4.6 Review

Metal-organic gels and their derived materials for electrochemical applications

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A Li+-integrated metallohydrogel-based mixed conductive electrochemical semiconductor

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Building multi-color emitters with tailored lanthanide-based supramolecular metallogels

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MACROMOLECULAR MATERIALS AND ENGINEERING (2022)

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Polyoxometalate-Containing Supramolecular Gels

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Summary: Supramolecular gels, fabricated through various interactions, can be enhanced by introducing negatively-charged clusters such as polyoxometalates (POMs). This review discusses the concept and design strategies of POM-containing gels, providing detailed examples to illustrate gelation process and structures. The applications of POM-containing gels in energy chemistry and sustainable chemistry are reviewed, along with future developments in this field.

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Chemical stimuli-induced reversible bond cleavage in covalently crosslinked hydrogels

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Summary: Supramolecular gels derived from low molecular weight gelators are fascinating soft and smart materials with various applications. Stimulus responsibility is an important property of supramolecular gel, which finds profound application in sensing.

JOURNAL OF THE INDIAN CHEMICAL SOCIETY (2022)

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Effect of an aqueous copper gel electrolyte with cobalt metal organic framework based additive on performance of aqueous-dye-sensitized solar cells

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Summary: This study designed three new tunable heteroleptic copper redox mediators and found that the copper mediator with a bulky high donor ligand had a better redox potential in dye sensitized solar cells (DSSC). Additionally, the addition of Co-MOF reduced recombination and improved the efficiency of the devices.

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Recent progress and perspectives on advanced flexible Zn-based batteries with hydrogel electrolytes

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Summary: This review comprehensively discusses recent advances in flexible Zn-based batteries with hydrogel electrolytes, focusing on the development of smart batteries with multifunctionalities. The soft and wet characteristics of hydrogel electrolytes, along with their high solubility of zinc salts, provide advantages for fabricating flexible batteries. Additionally, the tunable chemistries of hydrogels allow for the incorporation of novel functionalities such as super toughness, extreme temperature tolerance, stimuli-responsive properties, and self-healing capability. The design principles, including polymer chemistry, synthesis methods, characterization, and versatility demonstration, are comprehensively reviewed, and relevant challenges and perspectives are analyzed and discussed.

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Application of conductive polymer hydrogels in flexible electronics

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Summary: Flexible electronic devices for accurate and efficient human-machine interactions have garnered attention. Conductive polymer-based hydrogels (CPHs) are promising materials with tunable conductivity and soft mechanical properties for next-generation wearable electronic devices. This review summarizes material design and preparation of CPHs, highlighting their properties and emerging applications in flexible electronics.

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Progress on nanostructured gel catalysts for oxygen electrocatalysis

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Versatile electrochemiluminescence sensor for dual-potential off and on detection of double targets based on a novel terbium organic gel and multifunctional DNA network probes

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Summary: This critical review provides a timely and comprehensive summary of the applications, synthesis methods, and principles of carbon aerogel-based materials as electrocatalysts for oxygen reduction, oxygen evolution, hydrogen evolution, and CO2 reduction reactions. The prospects for emerging synthesis, screening, and construction methods are also outlined.

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Applications of metal-organic framework-derived N, P, S doped materials in electrochemical energy conversion and storage

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Metal-organic aerogel derived hierarchical porous metal-carbon nanocomposites as efficient bifunctional electrocatalysts for overall water splitting

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Summary: A novel tube-like metal-carbon nanocomposite with encapsulated Fe, Cr, and Ni nanoparticles is synthesized by carbonization of a metal-organic aerogel composite. The nanocomposite exhibits excellent catalytic activity and stability for water splitting, making it a promising non-noble metal-based electrocatalyst.

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Oxygen-rich ligands tailored for novel metal-organic gel electrocatalyst to promote two-electron selectivity electrocatalysis

Xinghao Zhang et al.

Summary: This study reports the use of metal-organic gels (MOGs) as catalysts for H2O2 electroproduction by precisely controlling the number of oxygen groups (OGs). Through the comparison of over 70 samples, it is found that OGs can significantly enhance the selectivity of the reaction. The Fe0.1Co0.9 MOG (H6L) shows promising activity and selectivity under low overpotential conditions, with a wide voltage window.

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Comparative study on proton conductivity of P- and G-UC

Xiaofeng Zheng et al.

Summary: Developing novel proton conductors is crucial to electrochemical technology for energy conversion and storage. Metal-organic frameworks (MOFs) have attracted wide attention for this purpose. Experimental results show that under high humidity conditions, G-UC exhibits better proton conductivity than P-UC, with more stable high proton conductivity and lower activation energy.

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A Wide Bandgap Semiconducting Magnesium Hydrogel: Moisture Harvest, Iodine Sequestration, and Resistive Switching

Noohul Alam et al.

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Self-Healable Poly(vinyl alcohol)-Metal-Organic Hybrid Gel Electrolyte for Flexible Capacitor Sensors

Zi-Cheng Wang et al.

Summary: In this study, a hybrid supramolecular gel electrolyte system based on a poly(vinyl alcohol) (PVA)-palladium coordination metal-organic gel (MOG) was reported. By controlling the ligand conformation transition from cis to trans, the PVA/MOG hybrid gels exhibited reversible coordination and hydrogen bonding interactions, resulting in 17 consecutive self-healing in 10000S and ultrafast self-healable ability in both mechanical and electrochemical time scales of 180 and 60 s, respectively. The sensor based on the hybrid gel electrolyte showed a wide voltage window and stable charge-discharge cycle, with the ability to recognize hand gestures with good sensitivity when printed onto a glove.

ACS APPLIED POLYMER MATERIALS (2022)

Review Chemistry, Multidisciplinary

Hierarchical porous metal-organic gels and derived materials: from fundamentals to potential applications

Jacek K. Wychowaniec et al.

Summary: Metal-organic gels (MOGs) are functional soft materials with hierarchical microporous/mesoporous pore structures, fabricated through metal-ligand coordination and supramolecular interactions. These materials have found important applications in electrochemical sensors, superhydrophobic materials, and ion storage devices, among others. They also show potential for spatially patterned macro-structured preparation.

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A multistimulus-responsive self-healable supramolecular copper(ii)-metallogel derived from l-(+) tartaric acid: an efficient Schottky barrier diode

Subhendu Dhibar et al.

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NEW JOURNAL OF CHEMISTRY (2022)

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A short review on the synthesis and advance applications of polyaniline hydrogels

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A croconate-directed supramolecular self-healable Cd(ii)-metallogel with dispersed 2D-nanosheets of hexagonal boron nitride: a comparative outcome of the charge-transport phenomena and non-linear rectifying behaviour of semiconducting diodes

Santanu Majumdar et al.

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DALTON TRANSACTIONS (2022)

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Multi-TpyCo2+-based conductive supramolecular hydrogels constructed by bridge bonds for rechargeable Zn-air batteries with ultrastable cycling stability over 1100 h

Qianqian Liu et al.

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JOURNAL OF MATERIALS CHEMISTRY A (2022)

Article Engineering, Environmental

A straightforward strategy to synthesize supramolecular amorphous zirconium metal-organic gel for efficient Pb(II) removal

Feng Zhao et al.

Summary: By developing a straightforward strategy involving standing time-controlled crystallization, amorphous Zr-MOG-12 was successfully synthesized with superb adsorption capacity for Pb(II) and excellent selectivity and reusability. Additionally, the transformation of amorphous Zr-MOG-12 to highly crystalline Zr-MOF' was achieved using glacial acetic acid as the crystallization promoter.

CHEMICAL ENGINEERING JOURNAL (2021)

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ACS APPLIED NANO MATERIALS (2021)

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Selection of hydrogel electrolytes for flexible zinc-air batteries

P. Zhang et al.

Summary: This study investigates the advances in conductivity, mechanical toughness, environmental adaptability, and interfacial compatibility of hydrogel electrolytes for flexible zinc-air batteries. Various additives are summarized to improve the conductivity of hydrogel electrolytes, while measures to enhance mechanical properties are taken through structure optimization and composition modification. The environmental adaptability and compatibility of the electrolyte-electrode interface are also discussed.

MATERIALS TODAY CHEMISTRY (2021)

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Facile coordination driven synthesis of metal-organic gels toward efficiently electrocatalytic overall water splitting

Xinghao Zhang et al.

Summary: In this study, a strategy for fabricating metalorganic gels (MOGs) through electrochemical overall water splitting was reported. The Ni0.6Fe0.4-MOG exhibited excellent oxygen evolution reaction (OER) performance and moderate hydrogen evolution reaction (HER) performance in 1 M KOH, outperforming most polymer catalysts. This work demonstrates that MOGs have the potential to surpass current polymer catalysts for electrocatalysis.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

Article Chemistry, Physical

Co/nitrogen-doped carbon nanocomposite derived from self-assembled metallogels as efficient bifunctional oxygen electrocatalyst for Zn-air batteries

Ningzhao Shang et al.

Summary: The folic acid based metal-organic gels synthesized through coordination induced self-assemble strategy show good dispersion and larger accessible surface areas, providing potential to enhance the oxygen reduction reaction and oxygen evolution reaction activities in nonprecious metal based bifunctional electrocatalysts for metal-air batteries.

APPLIED SURFACE SCIENCE (2021)

Article Chemistry, Applied

Alkali metal ion triggered conductive and stimuli-responsive metallogels

Shaorui Chen et al.

Summary: NDH gel prepared through dynamic coordination interactions between imidazoline-1,3-diol unit and alkali showed strong ion conductivity in experiments, with no significant impact on ions diffusion rate.

DYES AND PIGMENTS (2021)

Article Energy & Fuels

Metal-Organic Aerogel Assisted Reduced Graphene Oxide Coated Sulfur as a Cathode Material for Lithium Sulfur Batteries

Xiaochun Li et al.

Summary: Sulfur, as a cathode material for lithium-sulfur batteries, has drawn significant attention in research, but less focus has been given to the importance of binders in enhancing battery performance. In this study, Al (III)-carboxylate metal-organic aerogels (Al-MOGs) were introduced as a binder for the first time, demonstrating improved electrochemical performance and offering new perspectives for high-energy-density Li-S batteries.

ENERGY & FUELS (2021)

Article Engineering, Environmental

Chem-inspired synthesis of injectable metal-organic hydrogels for programmable drug carriers, hemostasis and synergistic cancer treatment

Zhangyou Yang et al.

Summary: Injectable metal-organic hydrogels with porous microstructure and flexibility were developed in this study for programmable encapsulation and pH-responsive release of various drugs, demonstrating rapid hemostatic effects in surgical animal models and effective tumor growth suppression. These hydrogels have promising potential for drug delivery and other biomedical applications.

CHEMICAL ENGINEERING JOURNAL (2021)

Review Chemistry, Inorganic & Nuclear

MOF and derived materials as aerogels: Structure, property, and performance relations

Pijush Kanti Chattopadhyay et al.

Summary: Metal organic framework (MOF) based aerogels have diverse applications and researchers are continuously developing new strategies to exploit their performance potential.

COORDINATION CHEMISTRY REVIEWS (2021)

Article Chemistry, Analytical

A boric acid-functionalized lanthanide metal-organic gel: A ratiometric fluorescence probe with rapid and sensitive detection of dopamine

Yiyang Sun et al.

Summary: This study constructed a new ratio fluorescent gel probe for the detection of dopamine. The probe has dual emission characteristics and achieves detection of dopamine by adjusting the energy conversion efficiency of the boronic acid-based ligand and Tb3+ ions, showing high sensitivity and selectivity. The probe has been successfully applied to detect dopamine in human serum samples.

MICROCHEMICAL JOURNAL (2021)

Article Chemistry, Applied

Novel self-supporting multilevel-3D porous NiO nanowires with metal-organic gel coating via like dissolves like to trigger high-performance binder-free lithium-ion batteries

Daoning Wu et al.

Summary: In this study, a novel concept of self-supporting multilevel-3D porous NiO nanowires was proposed and successfully synthesized for binder-free LIB electrodes. The in situ coating of Zr-MOG on the nanowires stabilizes the structure and provides cementation power, enhancing the electrode material adhesion and redox reaction performance. The NiO nanowires coated by Zr-MOG exhibit superior electrochemical performance, showing high specific capacity and cycle stability in LIB applications.

MICROPOROUS AND MESOPOROUS MATERIALS (2021)

Article Chemistry, Multidisciplinary

Templating Synthesis of Metal-Organic Framework Nanofiber Aerogels and Their Derived Hollow Porous Carbon Nanofibers for Energy Storage and Conversion

Wang Zhang et al.

Summary: By utilizing MOF nanofiber aerogels as carbon precursors, well-dispersed hollow porous carbon nanofibers can be efficiently synthesized to serve as hosts for sulfur encapsulation and electrocatalysts for ORR. The dispersed HPCNs exhibit enhanced electrochemical performance, indicating that the dispersion state of nanomaterials significantly influences their final properties and potential applications in energy storage and conversion.
Article Nanoscience & Nanotechnology

Metal-Organic Gel Derived N-Doped Granular Carbon: Remarkable Toluene Uptake and Rapid Regeneration

Xianming Zheng et al.

Summary: N-doped granular carbons synthesized by direct carbonization of metal-organic gel exhibit high toluene adsorption capacity and rapid regeneration, making them crucial for capturing VOCs from high humidity air. These materials show significant improvement in toluene adsorption compared to traditional carbon materials and exhibit excellent hydrophobicity, with a critical role of effective diffusion length in regeneration rate.

ACS APPLIED MATERIALS & INTERFACES (2021)

Article Nanoscience & Nanotechnology

Hierarchically Porous Metal-Organic Gel Hosting Catholyte for Limiting Iodine Diffusion and Self-Discharge Control in Sustainable Aqueous Zinc-I2 Batteries

Hiren K. Machhi et al.

Summary: The rechargeable aqueous zinc-iodine batteries (AZIBs) with a multipurpose sponge-like porous matrix of a metal-organic gel show superior electrochemical performance due to limited iodine diffusion, leading to high capacity retention and long-term stability even after 1500 cycles. Prototype flexible band-aid-type AZIBs also demonstrate promising performance in real-scale wearable applications.

ACS APPLIED MATERIALS & INTERFACES (2021)

Review Chemistry, Multidisciplinary

Metal-Organic Frameworks and Metal-Organic Gels for Oxygen Electrocatalysis: Structural and Compositional Considerations

Hao Wang et al.

Summary: The article discusses a new approach to improve oxygen electrocatalysis efficiency through rational design of metal-organic frameworks (MOFs) and metal-organic gels (MOGs). While MOFs/MOGs show potential in synthesizing oxygen electrocatalysts, they still face some challenges and future research directions.

ADVANCED MATERIALS (2021)

Article Chemistry, Multidisciplinary

Cucurbituril-Encapsulating Metal-Organic Framework via Mechanochemistry: Adsorbents with Enhanced Performance

Jun Liang et al.

Summary: This study presents the first examples of monolithic crystalline host-guest hybrid materials, which are achieved through the reaction of 1,3,5-benzenetricarboxylic acid and Fe(NO3)(3).9 H2O in the presence of decamethylcucurbit[5]uril ammonium chloride. The resulting MC5@MIL-100(Fe) hybrid monoliths exhibit hierarchical micro-, meso- and macropores, enhanced CH4 and lead(II) uptake performance, and selective capture of lead(II) cations at low concentrations, demonstrating synergistic properties that out-perform individual components-based materials.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Chemistry, Multidisciplinary

Self-Foaming Metal-Organic Gels Based on Phytic Acid and Their Mechanical, Moldable, and Load-Bearing Properties.

Yali Xiao et al.

Summary: A series of metal-organic gels were synthesized from phytic acid (PA) and various metal ions upon heating at 80 degrees C, with unique morphologies and properties observed in different compositions. The self-foaming gel PA-Fe-1 : 4 exhibited reversible gel-sol phase transition and load-bearing capabilities, showcasing the potential for tunable properties based on naturally abundant resources.

CHEMISTRY-A EUROPEAN JOURNAL (2021)

Review Chemistry, Inorganic & Nuclear

Fluorescent supramolecular self-assembly gels and their application as sensors: A review

Xinhua Cao et al.

Summary: Low molecular weight gels are extensively studied and used in supramolecular chemistry due to their ability to construct functional soft materials through noncovalent interactions. Fluorescent LMWGs in particular have received attention for their excellent photophysical properties and sensing abilities, allowing them to selectively detect specific substances in various states.

COORDINATION CHEMISTRY REVIEWS (2021)

Article Chemistry, Multidisciplinary

Silver-Ion-Selective Gelation of Simple Pyridine-Naphthalimide Conjugates with Multiple Applications: Sensing, Drug Delivery, Dye Adsorption and Ion Conductivity

Sumit Ghosh et al.

Summary: Naphthalimide-based compounds 1-4 have been synthesized to exhibit excellent gelation properties in the presence of Ag+ ions, with compounds 1-3 forming gels with rock and fibrous morphologies. The Ag-gels not only demonstrate excellent ion conduction properties, but also possess other significant attributes in material chemistry.

CHEMISTRYSELECT (2021)

Review Chemistry, Physical

Tunable Interaction between Metal-Organic Frameworks and Electroactive Components in Lithium-Sulfur Batteries: Status and Perspectives

Fulai Qi et al.

Summary: Lithium-sulfur (Li-S) batteries show potential advantages, but face challenges in cycle life and efficiency. The design of metal-organic frameworks materials can enable precise interaction with electroactive components in the battery, thus improving battery performance.

ADVANCED ENERGY MATERIALS (2021)

Article Nanoscience & Nanotechnology

Processable UiO-66 Metal-Organic Framework Fluid Gel and Electrical Conductivity of Its Nanofilm with Sub-100 nm Thickness

Vetiga Somjit et al.

Summary: By employing a particle downsizing strategy, UiO-66 can be synthesized as a fluid gel with unique properties and processed into films of different thicknesses, enhancing its electrical conductivity. The impact of particle size and film thickness at the nanoscale on the electrical properties of UiO-66 is significant.

ACS APPLIED MATERIALS & INTERFACES (2021)

Article Chemistry, Multidisciplinary

Enantioselective Gel Phase Synthesis of Metal-Organic Materials

Dipankar Ghosh et al.

Summary: The asymmetric synthesis of homochiral metal-organic materials in chiral gels results in enantioselectivity, while synthesis in solution phase and achiral gels leads to conglomerates.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Engineering, Environmental

Soluble salt assisted synthesis of hierarchical porous carbon-encapsulated Fe3C based on MOFs gel for all-solid-state hybrid supercapacitor

Yidong Zhang et al.

Summary: A facile strategy was presented to fabricate hierarchical porous supercapacitor materials using NaCl-assisted MOFs gel as a structure-directing template, which can provide broad ion diffusion pathway and low charge-transfer resistance. The use of seawater instead of NaCl for preparing hierarchical porous carbon also showed good capacitive performance, demonstrating potential for advanced utilization of MOFs gel and seawater in designing electrodes materials.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Chemistry, Multidisciplinary

Phytic Acid-Based FeCo Bimetallic Metal-Organic Gels for Electrocatalytic Oxygen Evolution Reaction

Xiying Feng et al.

Summary: In this study, bimetallic metal-organic gels derived from phytic acid and mixed transition metal ions were reported for their excellent performance in electrocatalytic oxygen evolution reaction. The reduction method using NaBH4 effectively improved the electrocatalytic activity while maintaining the gel morphology structure. This strategy provides guidance for enhancing the performance of metal-organic electrocatalysts and their future applications.

CHEMISTRY-AN ASIAN JOURNAL (2021)

Article Electrochemistry

Self-healable metal-organic gel membranes as anodes with high lithium storage

Daoning Wu et al.

Summary: Amorphous metal-organic gel (MOG) membranes were successfully fabricated and applied as anodes for lithium ion batteries (LIBs) for the first time. These membrane anodes exhibited excellent electrochemical performance, outperforming metal-organic frameworks (MOFs) or MOGs without membrane formation. The conductivity of the membrane and viscosity of MOGs allowed for the fabrication of membrane electrodes without the need for carbon black, binder, or organic solvent.

ELECTROCHIMICA ACTA (2021)

Article Chemistry, Inorganic & Nuclear

Controlled fabrication of Ag nanoparticles in situ embedded in metal organic gel (MOG) as an efficient recyclable catalyst for the reduction of nitrophenol compounds

Jing Jia et al.

Summary: This study presents a facile, scalable, and environmentally friendly method to encapsulate catalytically active silver nanoparticles in porous metal-organic gel, resulting in a hybrid with remarkable catalytic activity. The strategy employed in this work opens up new possibilities for the functional applications of MOGs.

INORGANIC CHEMISTRY COMMUNICATIONS (2021)

Article Engineering, Environmental

Luminescent cellulose-based porous binary metal-organic gels in an adsorption bed for effective adsorption and sensitive detection of chlortetracycline hydrochloride

Meijun Liu et al.

Summary: Three novel (Fe-Eu) JLUE-MOGs were successfully synthesized and utilized for efficient adsorptive enrichment and sensitive detection of antibiotics. The properties of ample active sites, large surface areas, and hierarchical porous structures contributed to superb and rapid chlortetracycline hydrochloride (CTC) adsorption. The optimized conditions were explored by response surface methodology (RSM) and the fluorescent JLUE-MOG-7 was implemented for sensitive recognition of CTC, showing potential for real-time pollutants removal in wastewater treatment.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Engineering, Environmental

Energy-efficient capture of volatile organic compounds from humid air by granular metal organic gel

Xianming Zheng et al.

Summary: The formation of a granular Al-based metal organic gel, CAU-3-NH2(gel), with high surface area and adsorption capacity for VOCs, as well as its outstanding performance in dynamic adsorption and regeneration at mild temperatures, has been reported. The interaction of toluene-framework and adsorption process are investigated by using Grand Canonical Monte Carlo (GCMC) simulations.

JOURNAL OF HAZARDOUS MATERIALS (2021)

Article Materials Science, Multidisciplinary

In2S3-Polymer Hybrid Gels Derived from In(III) Metal-Organic Gels for Dye Adsorption, Photodegradation, and Bacteria Removal

Botian Li et al.

Summary: In this study, indium sulfide hybrid gels were prepared from indium(III) metal-organic gels as sacrificial templates, showing excellent photocatalytic and adsorption properties for the removal of organic dyes and bacteria. The hybrid gels exhibit potential applications in the photoinduced purification of water by scavenging organic dyes and bacteria.

MACROMOLECULAR MATERIALS AND ENGINEERING (2021)

Review Chemistry, Multidisciplinary

Advances and Novel Perspectives on Colloids, Hydrogels, and Aerogels Based on Coordination Bonds with Biological Interest Ligands

Noelia Maldonado et al.

Summary: This perspective article discusses the new advances in synthesizing colloids, gels, and aerogels by combining metal ions with ligands of biological interest. These materials can respond to different stimuli and have applications in drug delivery, antimicrobial materials, self-healable materials, sensors, catalytic or luminescent materials. The elimination of trapped solvents in gels can transform them into metal-organic aerogels and metal-organic xerogels, leading to new porous materials and composites for adsorption, conversion, and energy storage.

NANOMATERIALS (2021)

Review Materials Science, Multidisciplinary

Anions-responsive supramolecular gels: A review

Liangchun Li et al.

Summary: This article discusses the design strategies, mechanisms, and future applications of anion-responsive supramolecular gels, emphasizing the need for more focus on in vivo applications in areas such as drug delivery and disease detection. Through analyzing the latest research summaries, the advantages and disadvantages of anion-responsive gels are explored.

MATERIALS & DESIGN (2021)

Article Chemistry, Multidisciplinary

Copper Metallogel as Potential Drug Carrier for Anti-Inflammatory Drugs

Priyanka Choudhary et al.

Summary: Copper based Metal-Organic Gels show high efficiency in drug loading, with CuBTC@5FU demonstrating the best performance under physiological conditions, likely attributed to strong hydrogen bonding interactions between CuBTC and 5FU.

CHEMISTRYSELECT (2021)

Article Chemistry, Physical

Li+-Zn2+ tailored nanostructured metallohydrogel based mixed ionic-electronic conductors

Yeeshu Kumar et al.

Summary: A conductive metallohydrogel (MHG) was obtained by in situ LiOH deprotonation and Zn2+ coordination, aiming to fabricate a mixed ionic-electronic conductor without external dopants, and its conductive nature and utilization were well established through characterization techniques and EIS measurements.

SUSTAINABLE ENERGY & FUELS (2021)

Article Chemistry, Physical

Regulating the heteroatom doping in metallogel-derived Co@dual self-doped carbon onions to maximize electrocatalytic water splitting

Ekata Saha et al.

Summary: This study presents cobalt nanomaterials encapsulated in N,O-dual self-doped carbon onions, which show improved efficiency for oxygen evolution reaction (OER) by tuning heteroatom doping. The results indicate that Co@doped carbon onions are superior electrocatalysts compared to cobalt oxide materials from the same precursor, with the optimal doped cobalt catalyst achieving low overpotential and high turnover frequency. The reported materials are scalable and easily adjustable in terms of heteroatom doping, benefiting the rational design of transition metal-containing electrocatalysts for water splitting.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

Article Chemistry, Multidisciplinary

A V(iii)-induced metallogel with solvent stimuli-responsive properties: structural proof-of-concept with MD simulations

Sima Sedghiniya et al.

Summary: A new solvent stimuli-responsive metallogel, VGel, was synthesized and its self-assembly was investigated through molecular dynamics simulations. The gel formation was confirmed by experimental data and a detection method for counterfeit liquor was proposed based on VGel's stimuli-responsive feature.

RSC ADVANCES (2021)

Review Chemistry, Multidisciplinary

Towards conductive hydrogels in e-skins: a review on rational design and recent developments

Chujia Li

Summary: Conductive hydrogels have attracted significant attention for applications in E-skins due to their biocompatibility and stretchability. Achieving superior mechanical strength and conductivity in conductive hydrogels remains a challenge, but rational design frameworks and different fabrication methods can enhance their performance and functionality in E-skins.

RSC ADVANCES (2021)

Article Chemistry, Multidisciplinary

Electrochemical detection of heavy metal ions in water

Qi Ding et al.

Summary: Heavy metal ions are a major source of water pollution and are carcinogens threatening ecological balance and human health. Electrochemical detection methods offer high sensitivity, efficiency, portability, and cost-effectiveness, making them versatile for on-site inspections. This promising strategy has garnered attention for applications in agriculture, life science, clinical diagnosis, and analysis.

CHEMICAL COMMUNICATIONS (2021)

Article Chemistry, Physical

Conductive Zn(ii)-metallohydrogels: the role of alkali metal cation size in gelation, rheology and conductance

Chinthakuntla Mahendar et al.

Summary: In this study, a series of conductive metallohydrogels were synthesized and characterized to investigate the effect of alkali metal ion size on gel properties and the underlying mechanism of gelation. The results showed that the conductivity of metallohydrogels increased with the size of alkali metal ions, correlating with a decline in rheological properties, and that the conductivity of all synthesized metallohydrogels increased with temperature.

MOLECULAR SYSTEMS DESIGN & ENGINEERING (2021)

Article Chemistry, Multidisciplinary

Synthesis of macroscopic monolithic metal-organic gels for ultra-fast destruction of chemical warfare agents

Chuan Zhou et al.

Summary: Hierarchically porous monolithic UiO-66-X xerogels with enhanced degradability have been developed for the destruction of CWAs, exhibiting outstanding performance with ultrafast decomposition of vesicant agent sulfur mustard (HD) and nerve agent VX. This work represents the first report on macroscopic monolithic UiO-66-X xerogels for rapid decomposition of CWAs.

RSC ADVANCES (2021)

Article Materials Science, Multidisciplinary

Conductive NiMn-based bimetallic metal-organic gel nanosheets for supercapacitors

Qiankun Zhong et al.

Summary: A conductive NiMn-based bimetallic metal-organic gel with controllable morphology has been developed via self-assembly process, showing excellent performance in supercapacitors. This work provides an effective strategy for actual energy storage and conversion applications.

MATERIALS ADVANCES (2021)

Article Chemistry, Physical

A multi-responsive organogel and colloid based on the self-assembly of a Ag(i)-azopyridine coordination polymer

Botian Li et al.

Summary: In this study, coordination polymers with azo groups on the main chain were prepared through the coordination of C-3 symmetric azopyridine ligands and Ag(i). The trans coordination polymer exhibited self-healing and multi-stimuli response, forming an organogel, while the cis coordination polymer assembled into responsive nanoparticles that can produce fibrous precipitation under light irradiation.

SOFT MATTER (2021)

Article Nanoscience & Nanotechnology

Cu(II)-Based Nanofibrous Metallogel for Phenoxazinone Synthaselike Activity

Sougata Sarkar et al.

Summary: The simultaneous use of disodium succinate and hexamethylenetetramine with CuCl2 in an aqueous medium results in the formation of a selective metallogel, showcasing the cooperativity of ligands. The gel exhibits a nanoscale fibrillar network and is specifically responsive towards Cu(II) ions only, showing enzyme mimicking characteristics when used as a catalyst for oxidative conversion reactions such as phenoxazinone synthesis from 2-aminophenol.

ACS APPLIED NANO MATERIALS (2021)

Article Chemistry, Physical

A gel-limiting strategy for large-scale fabrication of Fe-N-C single-atom ORR catalysts

Youpeng Wang et al.

Summary: This study presents a gel-limiting strategy for fabricating Fe-N-C single-atom catalysts and evaluates its feasibility for large-scale applications. The Fe-SASCs exhibited superior electrocatalytic performance compared to commercial Pt/C and were successfully used in a homemade Zn-air battery, demonstrating practical application value. The reported strategy has the potential to be further developed for the preparation of more transition metal SASCs in the future.

JOURNAL OF MATERIALS CHEMISTRY A (2021)

Review Chemistry, Multidisciplinary

Emergent electrochemical functions and future opportunities of hierarchically constructed metal-organic frameworks and covalent organic frameworks

Yosuke Hara et al.

Summary: Designing spatial and architectural features across different scales is a crucial topic in materials science, with a focus on the effects of porous structures on mass transport phenomena. While significant progress has been made in traditional inorganic materials, such as ceramics, the mechanistic understanding of spatial features at the molecular level remains limited in the field of electrochemical reactions. Further research on well-defined architectures is essential for advancements in next-generation energy devices.

NANOSCALE (2021)

Article Chemistry, Multidisciplinary

The fabrication and characterization of a supramolecular Cu-based metallogel thin-film based Schottky diode†

Vivek Kumar et al.

Summary: In this study, a stable supramolecular Cu(ii)-metallogel was successfully synthesized and its mechanical properties, aggregation morphology, structural morphology, elemental composition, crystalline behavior, thermal stability, and optical properties were explored, leading to the successful fabrication of a Schottky diode.

NEW JOURNAL OF CHEMISTRY (2021)

Article Chemistry, Multidisciplinary

In situ immobilization of Fe/Fe3C/Fe2O3 hollow hetero-nanoparticles onto nitrogen-doped carbon nanotubes towards high-efficiency electrocatalytic oxygen reduction

Binbin Zhang et al.

Summary: The study successfully synthesized Fe/Fe3C/Fe2O3 hollow heterostructured nanoparticles immobilized on nitrogen-doped carbon nanotubes via a hydrogel-bridged pyrolysis strategy, exhibiting excellent catalytic activity and structural stability for the oxygen reduction reaction in an alkaline electrolyte.

NANOSCALE (2021)

Article Chemistry, Inorganic & Nuclear

Convenient synthesis of polymetallic metal-organic gels for efficient methanol electro-oxidation

Yan-Jiang Wang et al.

Summary: In this study, AlNi-MOG and AlNi-based trimetallic MOGs were successfully fabricated and used as electrocatalysts for the methanol oxidation reaction (MOR). Among them, the AlNiCu-MOG showed improved MOR activity, which was further enhanced by the addition of acetylene black. These results indicate a promising application of MOGs in MOR.

INORGANIC CHEMISTRY FRONTIERS (2021)

Review Chemistry, Multidisciplinary

Supramolecular gels in cyanide sensing: a review

Santanu Panja et al.

Summary: This article discusses the current status and challenges of using supramolecular low molecular weight gels for cyanide visual sensing, emphasizing the advantages of gels over traditional methods.

MATERIALS CHEMISTRY FRONTIERS (2021)

Article Chemistry, Physical

Ag-Induced metallogel based on cyclooctatetrathiophene: structural characterization and stimuli-responsive properties

Yu Tian et al.

Summary: Utilizing saddle-shaped cyclooctathiophene as building blocks, ligands 2 and 3 were synthesized with 3- or 4-substituted pyridyl groups, showing strong gelation abilities with AgBF4 in various solvents at room temperature. The Ag+-induced metallogel exhibited outstanding stimuli-responsive properties upon addition of halogen ions, acetonitrile or H2O.

SOFT MATTER (2021)

Article Chemistry, Applied

Metal-Organic Gel-Derived Co/CoO/Co3O4 Composite for the Electrochemical Detection of Diethylstilbestrol

Zhengmao Cao et al.

APPLIED ORGANOMETALLIC CHEMISTRY (2020)

Review Electrochemistry

Progress on Synthesis and Applications of Porous Carbon Materials

Bowen Li et al.

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE (2020)

Article Nanoscience & Nanotechnology

Metal-Organic Nanogel with Sulfonated Three-Dimensional Continuous Channels as a Proton Conductor

Ming Qu et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

Article Engineering, Environmental

Mesoporous LaFeO3 perovskite derived from MOF gel for all-solid-state symmetric supercapacitors

Yidong Zhang et al.

CHEMICAL ENGINEERING JOURNAL (2020)

Article Chemistry, Multidisciplinary

Imine Gels Based on Ferrocene and Porphyrin and Their Electrocatalytic Property

Guangmei Cai et al.

CHEMISTRY-AN ASIAN JOURNAL (2020)

Article Chemistry, Multidisciplinary

TpyCo2+-Based Coordination Polymers by Water-Induced Gelling Trigged Efficient Oxygen Evolution Reaction

Qianqian Liu et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

Article Chemistry, Multidisciplinary

Electroactive Covalent Organic Frameworks: Design, Synthesis, and Applications

Yusran Yusran et al.

ADVANCED MATERIALS (2020)

Review Engineering, Environmental

Hierarchically porous monolithic MOFs: An ongoing challenge for industrial-scale effluent treatment

Fabrice Lorignon et al.

CHEMICAL ENGINEERING JOURNAL (2020)

Review Chemistry, Multidisciplinary

Novel Two-dimensional Porous Materials for Electrochemical Energy Storage: A Minireview

Lei Mao et al.

CHEMICAL RECORD (2020)

Review Chemistry, Multidisciplinary

Hydrogels and Hydrogel-Derived Materials for Energy and Water Sustainability

Youhong Guo et al.

CHEMICAL REVIEWS (2020)

Review Chemistry, Inorganic & Nuclear

Supramolecular redox-responsive ferrocene hydrogels and microgels

Xiong Liu et al.

COORDINATION CHEMISTRY REVIEWS (2020)

Review Chemistry, Multidisciplinary

Recent Electrochemical Applications of Metal-Organic Framework-Based Materials

Somayeh Tajik et al.

CRYSTAL GROWTH & DESIGN (2020)

Article Materials Science, Multidisciplinary

Advances and Challenges of Fe-MOFs Based Materials as Electrocatalysts for Water Splitting

Min Yang et al.

APPLIED MATERIALS TODAY (2020)

Article Nanoscience & Nanotechnology

Cd-Based Metallohydrogel Composites with Graphene Oxide, MoS2, MoSe2, and WS2 for Semiconducting Schottky Barrier Diodes

Santanu Majumdar et al.

ACS APPLIED NANO MATERIALS (2020)

Article Chemistry, Multidisciplinary

Metal-organic framework gels and monoliths

Jingwei Hou et al.

CHEMICAL SCIENCE (2020)

Article Nanoscience & Nanotechnology

Electrochemical Activation of Heterometallic Nanofibers for Hydrogen Evolution

Yali Xiao et al.

ACS APPLIED NANO MATERIALS (2020)

Review Chemistry, Inorganic & Nuclear

Recent advances in coordination-driven polymeric gel materials: design and applications

Papri Sutar et al.

DALTON TRANSACTIONS (2020)

Review Polymer Science

Conducting gels: A chronicle of technological advances

Priyadarshi Chakraborty et al.

PROGRESS IN POLYMER SCIENCE (2019)

Article Chemistry, Multidisciplinary

Green One-Pot Synthesis of Silver Nanoparticles/Metal-Organic Gels Hybrid and Its Promising SERS Application

Yang Li et al.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2019)

Article Chemistry, Physical

Microgels in biomaterials and nanomedicines

Yitong Wang et al.

ADVANCES IN COLLOID AND INTERFACE SCIENCE (2019)

Article Electrochemistry

A promising heat-induced supramolecular metallogel electrolyte for quasi-solid-state dye-sensitized solar cells

Wei Zhang et al.

JOURNAL OF SOLID STATE ELECTROCHEMISTRY (2019)

Article Chemistry, Inorganic & Nuclear

A Copper Metal-Organic Hydrogel as a Catalyst for SO2 and CO2 Fixation under Ambient Conditions

Chandane Kumar Karan et al.

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY (2019)

Article Chemistry, Multidisciplinary

A Self-Healing Metal-Organic Hydrogel for an All-Solid Flexible Supercapacitor

Chandan Kumar Karan et al.

CHEMISTRY-A EUROPEAN JOURNAL (2019)

Article Chemistry, Physical

Monoethanolamine and Fe(III) based metallohydrogel: An efficient Schottky barrier diode

Subhendu Dhibar et al.

JOURNAL OF MOLECULAR LIQUIDS (2019)

Review Chemistry, Physical

A review on heavy metal pollution, toxicity and remedial measures: Current trends and future perspectives

Kilaru Harsha Vardhan et al.

JOURNAL OF MOLECULAR LIQUIDS (2019)

Article Chemistry, Multidisciplinary

Electrocatalytic Oxygen Evolution in Acidic and Alkaline Media by a Multistimuli-Responsive Cobalt(II) Organogel

Ekata Saha et al.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2019)

Article Chemistry, Physical

Fast self-healing and rebuildable polyphosphate-based metallo-gels with mixed ionic-electronic conductivity

Euzebio Skovroinski et al.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2019)

Article Chemistry, Multidisciplinary

Metal-Organic Gel-Derived FexOy/Nitrogen-Doped Carbon Films for Enhanced Lithium Storage

Dong-Hui Yang et al.

Article Electrochemistry

Porous Organic Polymer Gel Derived Electrocatalysts for Efficient Oxygen Reduction

Baolong Zhou et al.

CHEMELECTROCHEM (2019)

Review Chemistry, Multidisciplinary

Metallogels: Availability, Applicability, and Advanceability

Huiqiong Wu et al.

ADVANCED MATERIALS (2019)

Review Chemistry, Physical

Hydrogels for anion removal from water

Hu Wang et al.

JOURNAL OF MATERIALS CHEMISTRY A (2019)

Article Chemistry, Multidisciplinary

Color-tunable lanthanide metal-organic framework gels

Fei Chen et al.

CHEMICAL SCIENCE (2019)

Article Chemistry, Multidisciplinary

Luminescent lanthanide (Eu(iii)) cross-linked supramolecular metallo co-polymeric hydrogels: the effect of ligand symmetry

Samuel J. Bradberry et al.

CHEMICAL COMMUNICATIONS (2019)

Article Chemistry, Multidisciplinary

A Supramolecular Gel of Oxalic Acid-Monoethanolamine for Potential Schottky Barrier Diode Application

Subhendu Dhibar et al.

CHEMISTRYSELECT (2019)

Article Chemistry, Multidisciplinary

Energy efficient electrochemical reduction of CO2 to CO using a three-dimensional porphyrin/graphene hydrogel

Jaecheol Choi et al.

ENERGY & ENVIRONMENTAL SCIENCE (2019)

Article Chemistry, Multidisciplinary

A simple approach to achieve a metastable metal oxide derived from carbonized metal-organic gels

Jing-Cheng Huang et al.

CHEMICAL COMMUNICATIONS (2019)

Article Nanoscience & Nanotechnology

Self-Healable Lanthanoid-Based Metallogels: Dye Removal and Crystallization in the Confined Gel State

Novina Malviya et al.

ACS APPLIED NANO MATERIALS (2019)

Article Chemistry, Inorganic & Nuclear

Polyoxometalate-based metallogels as anode materials for lithium ion batteries

Xing Meng et al.

DALTON TRANSACTIONS (2019)

Article Engineering, Electrical & Electronic

Development of Supra molecular Semiconducting Mn(II)-Metallogel Based Active Device with Substantial Carrier Diffusion Length

Subhendu Dhibar et al.

ACS APPLIED ELECTRONIC MATERIALS (2019)

Article Chemistry, Physical

A sol-gel monolithic metal-organic framework with enhanced methane uptake

Tian Tian et al.

NATURE MATERIALS (2018)

Review Chemistry, Multidisciplinary

Metal Organic Framework Derived Materials: Progress and Prospects for the Energy Conversion and Storage

Arindam Indra et al.

ADVANCED MATERIALS (2018)

Article Chemistry, Multidisciplinary

Stimuli-Responsive Metallogels for Synthesizing Ag Nanoparticles and Sensing Hazardous Gases

Protap Biswas et al.

CHEMISTRY-AN ASIAN JOURNAL (2018)

Article Chemistry, Physical

Porphyrin-based imine gels for enhanced visible-light photocatalytic hydrogen production

Peisen Liao et al.

JOURNAL OF MATERIALS CHEMISTRY A (2018)

Review Chemistry, Multidisciplinary

Modular Design of Porous Soft Materials via Self-Organization of Metal-Organic Cages

Nobuhiko Hosono et al.

ACCOUNTS OF CHEMICAL RESEARCH (2018)

Review Materials Science, Multidisciplinary

Recent Advances and Perspective on Design and Synthesis of Electrode Materials for Electrochemical Sensing of Heavy Metals

Huijie Hou et al.

ENERGY & ENVIRONMENTAL MATERIALS (2018)

Article Chemistry, Multidisciplinary

Pyridine coupled mono and bisbenzimidazoles as supramolecular gelators: selective metal ion sensing and ionic conductivity

Santanu Panja et al.

MATERIALS CHEMISTRY FRONTIERS (2018)

Article Chemistry, Inorganic & Nuclear

A supramolecular Cd(ii)-metallogel: an efficient semiconductive electronic device

Subhendu Dhibar et al.

DALTON TRANSACTIONS (2018)

Article Chemistry, Multidisciplinary

The Kinetics of Growth of Metallo-supramolecular Polyelectrolytes in Solution

Stefanie Martina Munzert et al.

CHEMISTRY-A EUROPEAN JOURNAL (2018)

Article Chemistry, Multidisciplinary

Copper-Based Metal-Organic Porous Materials for CO2 Electrocatalytic Reduction to Alcohols

Jonathan Albo et al.

CHEMSUSCHEM (2017)

Article Chemistry, Inorganic & Nuclear

Transforming HKUST-1 Metal-Organic Frameworks into Gels - Stimuli-Responsiveness and Morphology Evolution

Peisen Liao et al.

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY (2017)

Article Spectroscopy

Al-based metal-organic gels for selective fluorescence recognition of hydroxyl nitro aromatic compounds

Mao Xia Guo et al.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2017)

Article Chemistry, Multidisciplinary

Gel-based morphological design of zirconium metal-organic frameworks

Bart Bueken et al.

CHEMICAL SCIENCE (2017)

Article Chemistry, Multidisciplinary

Trace-doped metal-organic gels with remarkably enhanced luminescence

Xiying Feng et al.

RSC ADVANCES (2017)

Article Chemistry, Multidisciplinary

High Salt Removal Capacity of Metal-Organic Gel Derived Porous Carbon for Capacitive Deionization

Zhuo Wang et al.

ACS SUSTAINABLE CHEMISTRY & ENGINEERING (2017)

Article Chemistry, Physical

A multi-stimuli responsive conductive sonometallogel: a mechanistic insight into the role of ultrasound in gelation

Vinay Kumar Pandey et al.

JOURNAL OF MATERIALS CHEMISTRY A (2017)

Article Chemistry, Multidisciplinary

Polyoxometalate-based gelating networks for entrapment and catalytic decontamination

Kevin P. Sullivan et al.

CHEMICAL COMMUNICATIONS (2017)

Review Chemistry, Multidisciplinary

Multifunctional Nanostructured Conductive Polymer Gels: Synthesis, Properties, and Applications

Fei Zhao et al.

ACCOUNTS OF CHEMICAL RESEARCH (2017)

Article Chemistry, Multidisciplinary

Nitrogen-doped porous carbon material derived from metal-organic gel for small biomolecular sensing

Yung-Han Shih et al.

CHEMICAL COMMUNICATIONS (2017)

Article Chemistry, Multidisciplinary

Chemically Resistant, Shapeable, and Conducting Metal-Organic Gels and Aerogels Built from Dithiooxamidato Ligand

Daniel Vallejo-Sanchez et al.

ADVANCED FUNCTIONAL MATERIALS (2017)

Article Nanoscience & Nanotechnology

Nanostructured Electrode Materials Derived from Metal-Organic Framework Xerogels for High-Energy-Density Asymmetric Supercapacitor

Asif Mahmood et al.

ACS APPLIED MATERIALS & INTERFACES (2016)

Review Chemistry, Multidisciplinary

Electrically Conductive Porous Metal-Organic Frameworks

Lei Sun et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2016)

Review Chemistry, Multidisciplinary

Supramolecular metallogels with bulk self-healing properties prepared by in situ metal complexation

Marleen Haering et al.

CHEMICAL COMMUNICATIONS (2016)

Article Chemistry, Physical

Supramolecular Metallogel That Imparts Self-Healing Properties to Other Gel Networks

Tobias Feldner et al.

CHEMISTRY OF MATERIALS (2016)

Article Chemistry, Multidisciplinary

Creating Coordination-Based Cavities in a Multiresponsive Supramolecular Gel

Shi-Chao Wei et al.

CHEMISTRY-A EUROPEAN JOURNAL (2015)

Article Chemistry, Multidisciplinary

Fe(III) phytate metallogel as a prototype anhydrous, intermediate temperature proton conductor

Harshitha Barike Aiyappa et al.

CHEMICAL SCIENCE (2015)

Article Nanoscience & Nanotechnology

Nitrogen-Doped Porous Carbon Derived from Metal-Organic Gel for Electrochemical Analysis of Heavy-Metal Ion

Lin Cui et al.

ACS APPLIED MATERIALS & INTERFACES (2014)

Article Chemistry, Physical

A novel metal-organic gel based electrolyte for efficient quasi-solid-state dye-sensitized solar cells

Jie Fan et al.

JOURNAL OF MATERIALS CHEMISTRY A (2014)

Article Chemistry, Multidisciplinary

Proton-Conducting Supramolecular Metallogels from the Lowest Molecular Weight Assembler Ligand: A Quote for Simplicity

Subhadeep Saha et al.

CHEMISTRY-A EUROPEAN JOURNAL (2013)

Review Chemistry, Inorganic & Nuclear

Metal-organic gels: From discrete metallogelators to coordination polymers

Jianyong Zhang et al.

COORDINATION CHEMISTRY REVIEWS (2013)

Article Chemistry, Multidisciplinary

In situ generation of conducting polymer in a redox-active metal-organic gel

Barun Dhara et al.

RSC ADVANCES (2013)

Article Chemistry, Multidisciplinary

Triptycene based luminescent metal-organic gels for chemosensing

Samir Barman et al.

CHEMICAL COMMUNICATIONS (2012)

Review Chemistry, Multidisciplinary

Metal- and Anion-Binding Supramolecular Gels

Marc-Oliver M. Piepenbrock et al.

CHEMICAL REVIEWS (2010)

Article Chemistry, Multidisciplinary

A metal-organic gel used as a template for a porous organic polymer

Q Wei et al.

CHEMICAL COMMUNICATIONS (2005)