Assembling covalent organic framework membranes with superior ion exchange capacity

Article Engineering, Chemical

Pressure-modulated synthesis of self-repairing covalent organic frameworks (COFs) for high-flux nanofiltration

Congcong Yin et al.

Summary: The pressure-modulated synthesis method is used to prepare defect-free COF membranes on seeded substrates for fast nanofiltration, resulting in improved selectivity and permeance.

JOURNAL OF MEMBRANE SCIENCE (2021)

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Article Chemistry, Multidisciplinary

Self-Assembly-Driven Nanomechanics in Porous Covalent Organic Framework Thin Films

Kaushik Dey et al.

Summary: This study investigates the mechanical behavior of different types of COF thin films by controlling the internal order and self-assembly of building blocks, revealing that defect density and the nature of supramolecular interactions play a significant role in determining the stress-strain behavior of the films.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Chemistry, Multidisciplinary

Polycrystalline Covalent Organic Framework Films Act as Adsorbents, Not Membranes

Julie L. Fenton et al.

Summary: Covalent organic framework (COF) membranes function as adsorbents rather than size-sieving membranes. Adsorption of various dyes by COFs shows high capacity and diverse affinities, driven by variable entropic gains. Further examination of the COF membrane literature is necessary, as separations based on differential transport through 2D COF pores remain an important yet unrealized frontier.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Review Chemistry, Multidisciplinary

Understanding the Ion Transport Behavior across Nanofluidic Membranes in Response to the Charge Variations

Linxiao Hou et al.

Summary: This study decouples the effects of charge density from pore structure using a multivariate strategy to construct covalent organic framework-based membranes. The impact of charged sites density in nanofluidic membranes on ion transport activity, particularly focusing on Li+ and Mg2+ ions relevant to salt-lake lithium mining challenge, is systematically investigated. The synthesized membranes show outstanding selectivity for Li+ over Mg2+ and operational stability, making them potential candidates for lithium extraction and other controlled separation processes.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Free-Standing Covalent Organic Framework Membrane for High-Efficiency Salinity Gradient Energy Conversion

Shuhua Hou et al.

Summary: This study achieved efficient salinity gradient energy conversion by preparing a covalent organic framework membrane with high ion conductivity and selectivity.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Engineering, Chemical

Highly crystalline ionic covalent organic framework membrane for nanofiltration and charge-controlled organic pollutants removal

Tongfan Chen et al.

Summary: Organic pollutants, with biological toxicity, should be removed from the environment. A self-standing sulfonate anionic COF membrane shows high efficiency in nanofiltration separation and charge-controlled organic molecule separation.

SEPARATION AND PURIFICATION TECHNOLOGY (2021)

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Article Chemistry, Multidisciplinary

Surface-Mediated Construction of an Ultrathin Free-Standing Covalent Organic Framework Membrane for Efficient Proton Conduction

Lin Liu et al.

Summary: In this study, a new type of SCOF membrane was synthesized by surface-initiated condensation polymerization. The thickness of the COF layer could be adjusted by controlling the polymerization time, and free-standing COF membranes were obtained.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

Scalable Fabrication of Crystalline COF Membranes from Amorphous Polymeric Membranes

Chunyang Fan et al.

Summary: The transformation from amorphous polymeric membrane to crystalline COF membrane via monomer exchange allows for improved proton conductivity. The addition of intramolecular hydrogen bonds helps the crystalline COF maintain the morphology of the amorphous membrane.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

Tight Covalent Organic Framework Membranes for Efficient Anion Transport via Molecular Precursor Engineering

Yan Kong et al.

Summary: By molecular precursor engineering, tight COFs membranes with high hydroxide ion conductivity were synthesized using different quaternary ammonium-functionalized COFs. The impact of aldehyde precursors with varying properties on the reaction-diffusion process for fabricating COFs membranes was elucidated. More hydrophilic aldehydes tended to push the reaction zone to the aqueous phase, leading to the fabrication of tight membranes with significantly higher anion conductivity compared to loose membranes.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Review Chemistry, Inorganic & Nuclear

Design and application of ionic covalent organic frameworks

Penghui Zhang et al.

Summary: iCOFs are an emerging type of crystalline organic polymers that consist of the ionic skeleton and corresponding counterions. They combine the benefits of both porous ionic polymers and COFs, demonstrating great potential in ion conduction, adsorption, separation, catalysis, and sensing. Opportunities and challenges of iCOFs were analyzed in detail for understanding future prospects.

COORDINATION CHEMISTRY REVIEWS (2021)

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Article Chemistry, Multidisciplinary

Imparting Ion Selectivity to Covalent Organic Framework Membranes Using de Novo Assembly for Blue Energy Harvesting

Sifan Chen et al.

Summary: The study presents a facile strategy to fabricate angstrom-sized functional pores by incorporating ionic elements into three-dimensional covalent organic framework channels. The resulting membranes exhibit excellent permselectivity and low membrane resistance, showing potential for harvesting salinity gradient energy. Additionally, a reverse electrodialysis device coupled with positive and negative dye encapsulated COF membranes achieved a power density of up to 51.4 W m(-2), surpassing the commercialization benchmark.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Review Chemistry, Multidisciplinary

Organic molecular sieve membranes for chemical separations

Hongjian Wang et al.

Summary: Organic molecular sieve membranes (OMSMs) show great potential for molecular separations by precise construction of membrane structures and efficient intensification of membrane processes, integrating advantages of organic materials and inorganic molecular sieve membranes. The review provides insights into the design principles, assembly methods, mass transport mechanisms, and applications of OMSMs in gas and liquid molecular mixture separations, while also discussing challenges and future perspectives in the field.

CHEMICAL SOCIETY REVIEWS (2021)

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Review Chemistry, Multidisciplinary

Covalent Organic Frameworks: Chemical Approaches to Designer Structures and Built-In Functions

Xinyi Chen et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Article Engineering, Environmental

Selective extraction of thorium from uranium and rare earth elements using sulfonated covalent organic framework and its membrane derivate

Xiao Hong Xiong et al.

CHEMICAL ENGINEERING JOURNAL (2020)

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Article Chemistry, Multidisciplinary

Acid Exfoliation of Imine-linked Covalent Organic Frameworks Enables Solution Processing into Crystalline Thin Films

David W. Burke et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2020)

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Article Multidisciplinary Sciences

Laminated self-standing covalent organic framework membrane with uniformly distributed subnanopores for ionic and molecular sieving

Yang Li et al.

NATURE COMMUNICATIONS (2020)

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Article Chemistry, Multidisciplinary

De Novo Design of Covalent Organic Framework Membranes toward Ultrafast Anion Transport

Xueyi He et al.

ADVANCED MATERIALS (2020)

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Article Multidisciplinary Sciences

Self-standing and flexible covalent organic framework (COF) membranes for molecular separation

Jiangtao Liu et al.

SCIENCE ADVANCES (2020)

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Article Chemistry, Multidisciplinary

Weakly Humidity-Dependent Proton-Conducting COF Membranes

Li Cao et al.

ADVANCED MATERIALS (2020)

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Article Chemistry, Multidisciplinary

Solvent-Free, Single Lithium-Ion Conducting Covalent Organic Frameworks

Kihun Jeong et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

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Article Multidisciplinary Sciences

Covalent organic framework membranes through a mixed-dimensional assembly for molecular separations

Hao Yang et al.

NATURE COMMUNICATIONS (2019)

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Article Chemistry, Multidisciplinary

Ammoniating Covalent Organic Framework (COF) for High-Performance and Selective Extraction of Toxic and Radioactive Uranium Ions

Xiao Hong Xiong et al.

ADVANCED SCIENCE (2019)

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Review Chemistry, Multidisciplinary

Covalent Organic Frameworks: Chemistry beyond the Structure

Sharath Kandambeth et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

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Review Chemistry, Multidisciplinary

Covalent organic frameworks for membrane separation

Shushan Yuan et al.

CHEMICAL SOCIETY REVIEWS (2019)

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Review Chemistry, Multidisciplinary

Recent progress in covalent organic framework thin films: fabrications, applications and perspectives

Han Wang et al.

CHEMICAL SOCIETY REVIEWS (2019)

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Article Chemistry, Physical

Polydopamine-modulated covalent organic framework membranes for molecular separation

Jianliang Shen et al.

JOURNAL OF MATERIALS CHEMISTRY A (2019)

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Article Chemistry, Multidisciplinary

Covalent Organic Frameworks as a Decorating Platform for Utilization and Affinity Enhancement of Chelating Sites for Radionuclide Sequestration

Qi Sun et al.

ADVANCED MATERIALS (2018)

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Article Chemistry, Multidisciplinary

Superprotonic Conductivity in Flexible Porous Covalent Organic Framework Membranes

Himadri Sekhar Sasmal et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2018)

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Article Chemistry, Multidisciplinary

Porosity Prediction through Hydrogen Bonding in Covalent Organic Frameworks

Suvendu Karak et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2018)

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Article Chemistry, Multidisciplinary

Cationic Covalent Organic Framework Nanosheets for Fast Li-Ion Conduction

Hongwei Chen et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2018)

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Article Chemistry, Physical

A two-dimensional cationic covalent organic framework membrane for selective molecular sieving

Wenxiang Zhang et al.

JOURNAL OF MATERIALS CHEMISTRY A (2018)

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Article Chemistry, Multidisciplinary

Lewis-Acid-Catalyzed Interfacial Polymerization of Covalent Organic Framework Films

Michio Matsumoto et al.

CHEM (2018)

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Article Chemistry, Multidisciplinary

Flexible Films of Covalent Organic Frameworks with Ultralow Dielectric Constants under High Humidity

Pengpeng Shao et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2018)

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Article Chemistry, Multidisciplinary

Selective Molecular Sieving in Self-Standing Porous Covalent-Organic-Framework Membranes

Sharath Kandambeth et al.

ADVANCED MATERIALS (2017)

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Article Chemistry, Multidisciplinary

Selective Molecular Separation by lnterfacially Crystallized Covalent Organic Framework Thin Films

Kaushik Dey et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2017)

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Article Nanoscience & Nanotechnology

Mechanoassisted Synthesis of Sulfonated Covalent Organic Frameworks with High Intrinsic Proton Conductivity

Yongwu Peng et al.

ACS APPLIED MATERIALS & INTERFACES (2016)

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Article Chemistry, Physical

Interplaying Intrinsic and Extrinsic Proton Conductivities in Covalent Organic Frameworks

Suman Chandra et al.

CHEMISTRY OF MATERIALS (2016)

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Review Nanoscience & Nanotechnology

Covalent organic frameworks: a materials platform for structural and functional designs

Ning Huang et al.

NATURE REVIEWS MATERIALS (2016)

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Article Chemistry, Multidisciplinary

Two-Dimensional Covalent Organic Frameworks for Carbon Dioxide Capture through Channel-Wall Functionalization

Ning Huang et al.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2015)

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Article Chemistry, Multidisciplinary

Comparative study on the methods for predicting the reactive site of nucleophilic reaction

Jingsi Cao et al.

SCIENCE CHINA-CHEMISTRY (2015)

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Article Chemistry, Multidisciplinary

Mechanochemical Synthesis of Chemically Stable Isoreticular Covalent Organic Frameworks

Bishnu P. Biswal et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2013)

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Article Chemistry, Multidisciplinary

Multiwfn: A multifunctional wavefunction analyzer

Tian Lu et al.

JOURNAL OF COMPUTATIONAL CHEMISTRY (2012)

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Article Chemistry, Multidisciplinary

Construction of Crystalline 2D Covalent Organic Frameworks with Remarkable Chemical (Acid/Base) Stability via a Combined Reversible and Irreversible Route

Sharath Kandambeth et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2012)

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Article Chemistry, Multidisciplinary

Structure-Morphology-Property Relationships of Non-Perfluorinated Proton-Conducting Membranes

Timothy J. Peckham et al.

ADVANCED MATERIALS (2010)

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Review Chemistry, Multidisciplinary

Alternative polymer systems for proton exchange membranes (PEMs)

MA Hickner et al.

CHEMICAL REVIEWS (2004)

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Review Chemistry, Multidisciplinary

Transport in proton conductors for fuel-cell applications: Simulations, elementary reactions, and phenomenology

KD Kreuer et al.

CHEMICAL REVIEWS (2004)

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Article Chemistry, Analytical

Proton transfer in a single pore of a polymer electrolyte membrane

M Eikerling et al.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY (2001)

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Assembling covalent organic framework membranes with superior ion exchange capacity

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