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Article
Chemistry, Physical
Hao Hu et al.
Summary: In this study, four different covalent organic frameworks (COFs) were constructed to investigate the relationship between the composition of COFs and the photocatalytic performance for hydrogen peroxide (H2O2) evolution. The results showed that the optimized COF, 1H-COF, exhibited the highest ordered structure and the highest H2O2 yield among the four COFs.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Yan Yang et al.
Summary: By systematically engineering N-sites, architecture, and morphology, the authors have successfully improved the water splitting activity of beta-ketoamine COFs.
NATURE COMMUNICATIONS
(2023)
Review
Chemistry, Multidisciplinary
Yusuke Asakura et al.
Summary: Hollow covalent organic frameworks (COFs) have attracted significant attention due to their unique properties, such as enhanced surface-to-volume ratio, large surface area, hierarchical structure, highly ordered nanostructures, and excellent chemical stability. These intrinsic characteristics make hollow COFs highly attractive for various applications, including catalysis, energy storage, drug delivery, therapy, sensing, and environmental remediation. This review focuses on the recent advancements in the synthesis of hollow COFs and their derivatives, as well as their practical applications in different fields. The challenges, future opportunities, and the importance of hollow COFs in the future of materials science are also discussed.
Article
Chemistry, Multidisciplinary
Youxing Liu et al.
Summary: Researchers designed and constructed Cu2O/2D PyTTA-TPA COFs (PyTTA: 1,3,6,8-Tetrakis(4-aminophenyl)pyrene, TPA: p-benzaldehyde) core/shell nanocubes to greatly enhance the photocatalytic hydrogen evolution performance and inhibit photocorrosion.
Article
Chemistry, Multidisciplinary
Yuchen Yan et al.
Summary: The atomistic structural engineering of donor-acceptor polymer photocatalysts enhances charge separation and photocatalytic hydrogen production. Changing the electron affinity of the acceptor units allows for tuning of electron delocalization and exciton binding energy, resulting in improved efficiency. The optimized sample exhibits the highest H-2 production rate of 3207 mu mol g(-1) h(-1) when ascorbic acid is used as the sacrificial agent. Additionally, photocatalytic H-2 production can be coupled with near stoichiometric conversion of 5-hydroxymethyl furfural to 2,5-diformylfuran.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Kanghui Xiong et al.
Summary: This study synthesized three beta-ketoenamine COFs with different linker lengths and compared their photocatalytic activities. The results showed that the linker length plays an important role in the photocatalytic performance of COFs, and a moderate linker length can enhance the photocatalytic conversion rate.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Feng Chu et al.
Summary: A series of porous conjugated polymers were synthesized using mixed chloride salts as a template. The polymer materials displayed porous morphologies and different energy band structures by regulating the mass ratio of salts to monomers. Among them, PMTPA-20 exhibited a larger specific surface area and suitable redox potential for the photocatalytic oxidative coupling reaction. With molecular oxygen as the oxidant, PMTPA-20 achieved a conversion rate of 97% for benzylamine in 8 hours, which was 3.9 times higher than that of pristine PMTPA. Furthermore, PMTPA-20 catalyst showed good structural stability and reusability for photocatalytic reactions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Review
Chemistry, Applied
Duoyue Tang et al.
Summary: Traditional conversion of alcohols into carbonyl compounds has drawbacks including harsh reaction conditions, generation of hazardous wastes, and low selectivity. The emerging photo-, electro-, and photoelectro-catalytic conversion approaches offer a promising alternative by enabling selective oxidation of alcohols into valuable carbonyl compounds and simultaneous production of clean hydrogen (H2) under mild conditions. This review discusses the state-of-the-art strategies for selective oxidation of different types of alcohols and the design of catalysts, as well as current challenges and future research directions.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Wei Huang et al.
Summary: Semiconducting benzobisthiazole-based covalent organic frameworks with high crystallinity, great water-wettability, and fast charge separation dynamics were developed as a superior photocatalyst for hydrogen production. The material exhibited an extraordinary H2 evolution rate of 48.7 mmol g1 h1 under visible light irradiation. The polymeric photocatalyst featured ordered cylindrical mesopores and excellent catalytic performances, outperforming previous state-of-the-art photocatalysts.
NATIONAL SCIENCE REVIEW
(2023)
Article
Chemistry, Physical
Andrea M. Chanique et al.
Summary: Cold-active enzymes have optimal activity at low temperatures, making them useful for preserving heat-sensitive compounds. A cold-active flavin-dependent monooxygenase (FMO) was discovered in an Antarctic organism, showing high activity between 5 and 25 degrees C and promiscuity towards NADH and NADPH. The enzyme exhibits high enantioselectivity and has a unique active site structure.
Article
Chemistry, Multidisciplinary
Yanhui Qin et al.
Summary: A multifunctional core-shell nanoparticle, OPCPT, was constructed by coating PEGylated COF on photothermal carbon nanospheres. The COF shell dissociates in the acidic tumor microenvironment, leading to tumor-specific photothermal therapy and enhanced apoptosis of cancer cells. This study reveals the potential of COF-based nanomaterials for extended biomedical applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Shuhong Wu et al.
Summary: The keto-switched photocatalysis of covalent organic frameworks (COFs) for efficient H-2 evolution was achieved by engineering the local structure and component of the skeletal building blocks at a molecular level. The formation of keto-injectors in the COFs led to improved conduction band levels and an inhomogeneous charge distribution, resulting in a strong intramolecular built-in electric field. The photocatalytic H-2 evolution rates were significantly enhanced by alkaline post-treatment.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Haijie Ben et al.
Summary: Local charge polarization induced by intrinsic zwitterionic resonance structure effectively redistributes and separates charge carriers in photocatalysts, leading to enhanced photocatalytic activities. The novel SQ-COF-1 catalyst with the largest local polarization exhibits superior visible-light-driven photocatalytic performance compared to SQ-COF-2, PDA-COF, and common polymeric carbon nitride photocatalyst. This work presents a promising protocol for engineering charge behavior to advance the design of high-performance photocatalytic materials in the future.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Shuailong Yang et al.
Summary: In this study, a nickel-modified COF was reported to enhance the photocatalytic reduction of CO2 by modifying the linkage microenvironment.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jin Zhang et al.
Summary: The simultaneous presence of triazine and ketone acceptors in covalent organic frameworks has been found to enhance electron-hole separation efficiency and improve photocatalytic hydrogen production. COFs with two acceptors showed the highest hydrogen production rate. A single phenyl group as a bridging unit was more favorable for the catalytic reaction, indicating the importance of distance between acceptors in COF design.
Review
Chemistry, Inorganic & Nuclear
Guilong Lu et al.
Summary: The review summarizes strategies for constructing efficient photocatalyst systems and advanced techniques for investigating reaction mechanisms; discusses the application of MOFs in photocatalytic selective oxidation reactions and summarizes the role of reactive oxygen species (ROS) and corresponding regulation strategies; anticipates challenges and future developments of MOFs-based photocatalysts in this research area.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Chemistry, Physical
Xia Li et al.
Summary: 2D covalent organic frameworks (COFs) have recently shown promise as versatile photoactive functional materials. In this study, three 8-ketoenamine linked 2D COFs were successfully assembled, with Tp-BTD-25 exhibiting superior activity for photocatalytic oxidation reactions at lower temperature. The addition of TEMPO enhanced both stability and activity of the photocatalyst.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Shujuan Wu et al.
Summary: Covalent organic frameworks (COFs) have garnered attention in visible light photocatalysis, with 2D COFs like Por-DETH-COF exhibiting high selectivity for the red light-driven oxidation of benzyl amines to imines. The COF photocatalyst displays remarkable functional group compatibility and a wide scope of benzyl amine substrates.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
W. Zhang et al.
Summary: The study focuses on tuning semiconductor structures in metal-insulator-semiconductor systems to enhance the separation of photogenerated carriers in COFs for improved photocatalytic hydrogen production performance. The use of TiO2 as an electron collector and transporter and the smooth tunneling of photogenerated electrons into Pt nanoparticles in the metal-insulator-semiconductor system contribute to more efficient charge separation and higher photoexcitation rates.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Physical
Fulai Liu et al.
Summary: This research presents a strategy of built-in control of donor-acceptor interactions to regulate excitonic effects in benzobisthiazole-bridged covalent organic frameworks, leading to accelerated exciton dissociation and enhanced photocatalytic activity for H2 evolution.
Article
Chemistry, Multidisciplinary
Ming-Yu Qi et al.
Summary: Semiconductor-based photoredox catalysis offers a sustainable and mild strategy for organic transformation, but controlling selectivity is challenging due to non-selective interactions between semiconductors and photogenerated radicals. By designing atomically dispersed cocatalysts on semiconductor quantum dots, we achieve precise selectivity in high-performance heterogeneous coupling photosynthesis. This work overcomes the difficulties of selectivity regulation in semiconductor-based photochemical synthesis, highlighting the potential of utilizing atomically dispersed cocatalysts to control unselective radical conversion for selective heterogeneous photosynthesis.
Review
Chemistry, Multidisciplinary
Hui Chen et al.
Summary: This Review provides a comprehensive and systematic overview of the application of covalent organic frameworks (COFs) as photocatalysts for organic transformations. It covers the photophysical properties, characterization methods, general photocatalytic mechanism, advantages, and strategies to improve the efficiency of COF-based photocatalysts. It also analyzes advanced examples and discusses the challenges and prospects in the field.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Cheng-Juan Wu et al.
Summary: This study reports the first-ever synthesis of COF using natural sunlight and demonstrates its application as a reusable photocatalyst for promoting light-driven oxidation reactions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Jin Yang et al.
Summary: Isomerism in covalent organic frameworks (COFs) has a significant impact on their structure and properties, especially the configuration and orientation of the linkages. Experimental results show that different constitutional isomers exhibit substantial differences in their photophysical properties and photocatalytic performance.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Inorganic & Nuclear
Guang-Bo Wang et al.
Summary: Light-involved catalysis, especially photocatalysis and photothermal catalysis, is a promising alternative to traditional thermocatalysis. Highly efficient photocatalysts are crucial for the development of light-mediated catalysis. Covalent organic frameworks (COFs) are crystalline molecular solids with designable structures, light-harvesting, and semiconducting properties. The recent development of COFs has brought opportunities for visible-light induced organic transformations. This review comprehensively summarizes and discusses the applications of COFs in selective light-initiated organic transformations, provides an overview of COF-based photocatalysts, and discusses the limitations, challenges, and future perspectives of COF photocatalysis and photothermal catalysis.
COORDINATION CHEMISTRY REVIEWS
(2022)
Review
Chemistry, Physical
Zhenyu Wu et al.
Summary: This review summarizes recent advances in the use of metal-organic frameworks (MOFs) as heterogeneous catalysts for thermocatalytic selective oxidation of organic molecules. The application of different types of materials at different sites is discussed, with a particular emphasis on recent strategies to increase the number of active sites, shape/size selectivity, and long-term stability.
Article
Chemistry, Physical
Yuxiang Chen et al.
Summary: The study demonstrates that by manipulating the molecular structure of covalent organic frameworks (COFs), it is possible to enhance their photocatalytic performance, leading to improved efficiency in solar light-promoted hydrogen production from water.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Zhangjie Gu et al.
Summary: In this study, three triazine-based COFs with different electronic structures were successfully constructed by introducing various building blocks. It was found that the electron-deficient COF exhibited higher photocatalytic activity and selectivity. This result was further confirmed by photoelectrochemical measurements and theoretical calculations.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Lejing Li et al.
Summary: This study introduces a COF-based photocatalyst that can efficiently reduce O-2 to H2O2 in pure water under visible-light irradiation, overcoming the mass-transfer limitation of oxygen in water. By loading this catalyst onto a porous substrate to create a triphase interface, the production rate of H2O2 is significantly increased.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Huimin Hao et al.
Summary: Triazine-based materials like g-C3N4, CTF-1, and TP-COF show promise for visible light photocatalytic activation of O-2. TP-COF exhibits the best photocatalytic performance due to its large specific surface area, suitable bandgap, and superior charge transfer properties, enabling efficient conversion of organic sulfides under blue light.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Review
Chemistry, Multidisciplinary
Shuhong Wu et al.
Summary: This Minireview introduces state-of-the-art COF photocatalysts based on different linkages and discusses the origin of photocatalytic activities for hydrogen evolution. It focuses on advancements in synthetic methodologies, structural design, and photoelectronic properties relevant to photocatalytic performance of three typical COF photocatalysts with different linkages (-C=N-, O=C-C=C-NH-, and -C=C-). The review is expected to elucidate structure-property relationships and provide insights for designing photoactive COFs with enhanced performances.
Article
Chemistry, Multidisciplinary
Ting Wang et al.
Summary: This study demonstrates the synergistic effect of Pd SAs, clusters, and V(O)s on TiO2 in boosting photocatalytic reactions, leading to improved activity in hydrogen production and selective oxidation.
Review
Chemistry, Physical
Lunqiao Xiong et al.
Summary: This review provides an overview of the fundamentals of reactive oxygen species in photocatalytic organic oxidations and discusses strategies to improve the selectivity of high value chemicals. Difficulties and challenges in developing highly selective oxidation photocatalysts are comprehensively discussed to guide future research focus.
ADVANCED ENERGY MATERIALS
(2021)
Article
Engineering, Environmental
Ke Guo et al.
Summary: The study developed Ru/TpPa-1 catalysts for photocatalytic reduction of CO2 under visible light irradiation, showing significantly enhanced activity compared to TpPa-1. The interactions between Ru NPs and TpPa-1 were found to enhance visible-light harvesting and extend the service life of photo-generated charge carriers.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Zhenyu Wu et al.
Summary: The research demonstrates that COF-TpPa exhibits excellent performance in selective photocatalytic oxidative coupling of amines to imines under visible light irradiation, with the participation of three reactive oxygen species. The keto-enol tautomerism favors the adsorption of benzylamine based on characterization results and theoretical calculations.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Rui Xia et al.
Summary: This study successfully developed a series of COFs based on the electron donor-acceptor strategy with excellent colloidal stability and adjustable sizes, as well as varying absorption spectra. By altering the electron-donating ability of the monomers, these COFs exhibit a wide range of absorption spectra and potent photothermal activity, effectively inhibiting tumor growth.
Article
Chemistry, Multidisciplinary
Paolo Costa et al.
Summary: The photoassisted synthesis of value-added organic products has advanced significantly in recent decades to address the need for sustainable processes and renewable energy. Covalent organic frameworks (COFs) are emerging materials that show potential in bridging the gap between molecular and heterogeneous photocatalysis, offering a new approach for selective organic transformations. Interdisciplinary cooperation between synthetic chemistry and materials science communities is expected to drive further progress in this area.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Nanoscience & Nanotechnology
Shaoxiong Yang et al.
Summary: By modulating the reaction conditions, different stacking models of COF isomers can be obtained, leading to different generation efficiencies of ROS due to tautomerism involved in the reaction process.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Liying Yin et al.
Summary: This study investigates the structure-property relationships of COFs and their impact on photocatalytic performance. It is found that the backbone and substituents of COFs play important roles in influencing their band gap, spectral absorption, and carrier separation. TpPa-Cl2 demonstrates the best photocatalytic performance for hydrogen production among the studied COFs.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Chemistry, Multidisciplinary
Ming-Yu Qi et al.
Summary: The review discusses the combination of hydrogen evolution with oxidative organic synthesis using a semiconductor-mediated photoredox reaction, showcasing a dual-functional photocatalytic strategy for constructing C-C/C-X bonds under green conditions. It emphasizes the cooperative photoredox coupling of selective organic synthesis and H-2 production over semiconductor catalysts, highlighting recent progress and future perspectives in this flourishing area. It is anticipated to provide guidance for the development of economically and environmentally benign solar fuel generation and organic synthesis of value-added fine chemicals.
Review
Chemistry, Physical
Xiubing Huang et al.
Summary: Ceria-based catalysts have attracted significant attention in catalytic organic synthesis for their advantages of reversible redox pairs and surface properties, making them effective in achieving efficient organic transformations.
Article
Chemistry, Multidisciplinary
Xiangjun Li et al.
Summary: The study successfully synthesized MIL-125-NH-CH2OH@Ag@COF hybrids using thermo-enhanced photocatalysis technology, with the best photocatalytic performance observed at 60 degrees Celsius. The material achieved nearly 100% conversion of benzylamine and demonstrated good stability.
Article
Chemistry, Physical
Kaiyue Zhang et al.
Summary: The study investigates photocatalytic selective aerobic oxidation of amines to imines under visible light irradiation at specific temperatures using heterostructured TiO2(B)/anatase and Au/TiO2 nanobelts. It is found that the ligand-to-metal charge transfer effect between the surface amine substrate and metal can broaden visible-light absorption region. Pristine TiO2 achieves the best photocatalytic performance at 60 degrees C, while excessive Au NPs loaded on TiO2 inhibit the reaction process.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Applied
Chengbin Li et al.
Summary: In this study, mesoporous hybrid nanospheres were synthesized by one-pot method, with nanoCOPs uniformly distributed in the silica network, inheriting visible light responsive properties and enhancing photocatalyst activity successfully.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Siquan Zhang et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
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Samik Jhulki et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2018)
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(2018)
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JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2017)
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(2013)
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(2012)
