Review
Chemistry, Inorganic & Nuclear
Minghui Chen, Hongrui Li, Chenxi Liu, Jiayi Liu, Yaqing Feng, Andrew G. H. Wee, Bao Zhang
Summary: COFs are a type of structurally ordered porous materials constructed with light atoms through covalent bonds, with recent interest in tetrapyrrolic macrocycle-based COFs using porphyrin and its analogs as building blocks, showing potential applications in diverse fields.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Physical
Chenghan Yang, Chunfeng Mao, Qinghua Deng, Yong Yang, Yuming Zhou, Yiwei Zhang
Summary: In this study, a novel two-dimensional (2D) covalent organic framework (COF) with fxt topology was synthesized and metallized with gold species to form a heterogeneous catalyst. The Au@COF catalyst showed high catalytic activity and good recyclability, enabling the one-pot synthesis of flavone and its derivatives. This work demonstrates the great potential of metallized COFs in organic catalysis with unique well-defined pores.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Syed Shoaib Ahmad Shah, Muhammad Sufyan Javed, Tayyaba Najam, Muhammad Altaf Nazir, Aziz ur Rehman, Abdul Rauf, Manzar Sohail, Francis Verpoort, Shu-Juan Bao
Summary: This article provides a comprehensive explanation of the designed fabrication of COFs for heterogeneous catalysis and discusses the advantageous features of COFs as catalysts. It also highlights the active sites in COFs and presents future perspectives and challenges.
Article
Chemistry, Multidisciplinary
Bang Hou, Shi Yang, Kuiwei Yang, Xing Han, Xianhui Tang, Yan Liu, Jianwen Jiang, Yong Cui
Summary: Three-dimensional covalent organic frameworks (COFs) with well-defined porous channels have been shown to induce chiral molecular catalysts from non-enantioselective to highly enantioselective in catalyzing organic transformations. By condensing compounds derived from enantiopure BINOL, chiral COFs with highly interpenetrated diamondoid frameworks were prepared. The COF catalyst provides preferential secondary interactions between the substrate and framework to induce enantioselectivities that are not achievable in homogeneous systems.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Chemistry, Inorganic & Nuclear
Guang-Bo Wang, Ke-Hui Xie, Hai-Peng Xu, Yan-Jing Wang, Fei Zhao, Yan Geng, Yu -Bin Dong
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, Inorganic & Nuclear
Miao He, Qinghua Liang, Lin Tang, Zhifeng Liu, Binbin Shao, Qingyun He, Ting Wu, Songhao Luo, Yuan Pan, Chenhui Zhao, Chengang Niu, Yumeng Hu
Summary: This article introduces the magnetic composites formed by magnetic nanoparticles and covalent organic frameworks, which have the potential for rapid magnetic separation and high chemical stability in environmental remediation and biotechnology applications. The classification, characteristics, synthesis methods, and application areas of MCOFs composites are detailed, providing a theoretical basis for future synthesis and design.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Yusen Li, Xi Su, Wenhao Zheng, Jia-Jia Zheng, Linshuo Guo, Mischa Bonn, Xingfa Gao, Hai I. Wang, Long Chen
Summary: The targeted synthesis of kagome topologic 2D covalent organic frameworks (kgm Naph-COFs) remains challenging due to the dependence on building units and synthetic conditions. In this study, two isomeric Naph-COFs with different pore structures were successfully synthesized using elaborately designed monomers based on naphthalene core. The incorporation of C-60 into one of the isomeric COFs resulted in a stable C-60@m-Naph-COF composite with significantly higher photoconductivity compared to the pure m-Naph-COF.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Hao Zhang, Lan-Lan Lou, Kai Yu, Shuangxi Liu
Summary: Asymmetric catalysis is essential due to the increasing demand for optically pure substances. Metal-organic frameworks (MOFs) and covalent organic frameworks (COFs) show great potential for heterogeneous asymmetric catalysis. The unique properties of MOFs and COFs make them highly active and enantioselective for a wide range of asymmetric catalytic organic transformations.
Article
Chemistry, Physical
Chaonan Jin, Ning Li, En Lin, Xuepeng Chen, Ting Wang, Yan Wang, Mingfang Yang, Wansheng Liu, Jiangyue Yu, Zhenjie Zhang, Yao Chen
Summary: This study developed a photoenzymatic platform for asymmetric catalysis by immobilizing wheat germ lipase (WGL) onto rationally designed photocatalytic porphyrinic covalent organic frameworks (COFs). The WGL@COFs photobiocatalysts demonstrated high enzymatic activity and good operational stability, and exhibited excellent performance for an enantioselective Mannich reaction under visible light irradiation. This work provides a general and efficient strategy for fabricating photobiocatalysts that enable highly efficient photoenzymatic asymmetric catalysis using COFs as photocatalytic platforms for enzyme immobilization.
Article
Chemistry, Physical
Alberto Lopez-Magano, Borja Ortin-Rubio, Inhar Imaz, Daniel Maspoch, Jose Aleman, Ruben Mas-Balleste
Summary: The functionalization of an imine-based layered covalent organic framework has allowed the obtention of a heterobimetallated material with photoactive Ir and Ni fragments immobilized within the porous structure. These heterogeneous light-mediated reactions showed enhanced activity and stability compared to analogous homogeneous systems.
Review
Chemistry, Multidisciplinary
Xinyu Guan, Fengqian Chen, Shilun Qiu, Qianrong Fang
Summary: Three-dimensional covalent organic frameworks (3D COFs) with spatially periodic networks have significant advantages over their 2D counterparts, such as larger specific surface areas, interconnected channels, and more exposed active sites. However, the research on these materials faces challenges in crystallization and stability, which need to be addressed for practical applications. In this Minireview, strategies for preparing functional 3D COFs, including crystallization techniques and functionalization methods, are summarized. Applications of these functional materials in adsorption, separation, catalysis, fluorescence, sensing, and batteries are presented. Finally, the future challenges and perspectives for the development of 3D COFs are discussed.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Inorganic & Nuclear
Mahnaz Najafi, Sara Abednatanzi, Parviz Gohari Derakhshandeh, Fariba Mollarasouli, Sonia Bahrani, Elham Sadati Behbahani, Pascal Van der Voort, Mehrorang Ghaedi
Summary: Environmental pollution caused by various industries has led to water contamination, posing a threat to human life worldwide. Therefore, it is crucial to explore affordable and efficient technologies for water purification. Metal-organic frameworks (MOFs) and covalent organic frameworks (COFs) offer great potential in the field of water remediation. This review discusses the targeted design of MOFs and COFs, as well as key issues related to adjusting their structures and enhancing their stability for the removal of organic dyes through adsorption, catalysis, and extraction in water.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Materials Science, Multidisciplinary
Lucas K. Beagle, Qiyi Fang, Ly D. Tran, Luke A. Baldwin, Christopher Muratore, Jun Lou, Nicholas R. Glavin
Summary: This review highlights recent progress in the synthesis, customization of properties, and integration with other materials of porous polymeric covalent organic frameworks (COFs) thin films, showcasing their potential applications in filtration, electronics, sensors, and electrochemistry.
Article
Chemistry, Multidisciplinary
Ha L. Nguyen
Summary: Atmospheric water harvesting using reticular materials, particularly covalent organic frameworks (COFs), shows great potential due to their metal-free nature, stability, and customizable structure for this purpose. This article discusses the important features for synthesizing suitable water-harvesting COFs and highlights the achievements and structural design-related properties of using COFs as water harvesters. Perspectives and research directions for further studies in COF chemistry are also provided.
ADVANCED MATERIALS
(2023)
Review
Polymer Science
Tiago F. Machado, M. Elisa Silva Serra, Dina Murtinho, Artur J. M. Valente, Mu Naushad
Summary: Covalent Organic Frameworks are a new class of microporous polymers with unprecedented properties, offering promising solutions in a vast number of fields. By strategically combining monomers with specific structures and properties, COF materials can be fine-tuned and controlled, allowing for post-synthetic functionalization.
Review
Chemistry, Multidisciplinary
Tao Wang, A. Stephen K. Hashmi
Summary: Gold carbenes are highly active in homogeneous gold catalysis, facilitating various transformations including C-H/X-H insertions, cyclopropanations, and 1,2-migrations. While 1,2-migrations onto gold carbene centers have received less attention compared to other reactions, they have the potential to be a powerful tool for constructing molecular complexity rapidly and simply.
Article
Agriculture, Multidisciplinary
Wei Wang, Shan Zhang, Jianhua Wang, Furan Wu, Tao Wang, Gong Xu
Summary: A series of potential novel fungicides were designed and synthesized, with two compounds showing significant antifungal activities against various fungi. These compounds could be promising candidates for the development of new fungicides in crop protection.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2021)
Article
Chemistry, Organic
Yu Tian, Zunting Zhang, Tao Wang
Summary: The facile synthesis of isatin-hydrazones from 3-diazo oxindoles and sulfoxonium ylides under catalyst- and additive-free conditions is described, with a proposed reaction pathway involving diazo compounds as electrophiles reacting with nucleophilic sulfoxonium ylides, supported by experimental evidence.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Applied
Jingzhi Sui, Yun He, Tao Wang, Yong Liang, Zunting Zhang
Summary: The synthesis of three types of quinoline compounds, including trans-4a,12b-dihydrodibenzo[fh]quinolin-2(1H)-ones (2), dibenzo[f,h]quinolin-2(1H)-ones (3) and 3,4-dihydrodibenzo[f,h]quinolin-2(1H)-ones (4), was achieved through photo-induced annulation of 6-([1,1'-biphenyl]-2-yl)pyridine-2(1H)-ones (1) under 313 nm UV light. The highest yield reached 95%.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Chemistry, Applied
Nana Wang, Ding Wang, Yun He, Jin Xi, Tao Wang, Yong Liang, Zunting Zhang
Summary: A concise method for the synthesis of phenanthridin-6(5H)-ones via photoinduced intramolecular annulation of N-phenylbenzamides was developed. The method is efficient, environmentally friendly, and can be conducted at room temperature.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Yaxing Zhang, Yuanyuan Zheng, Changsheng Shi, Jinyan Zhang, Tao Wang, Ning Sun, Qiang Wang
Summary: This study focuses on the design and synthesis of two solution-processable orange-red TADF emitters. By modifying the carbazole group and appropriate acceptor screening, highly efficient emission characteristics were achieved.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Organic
Yuan Zhao, Ningning Liu, Shiping Zhong, Ziwei Wen, Tao Wang
Summary: This article presents a strategy for central-to-axial chirality conversion via a gold(I)-catalyzed 5-endo-dig cyclization/dehydration cascade to construct C-N axially chiral N-arylpyrroles from amino acid derivatives. The reaction demonstrates high efficiency in central-to-axial chirality conversion.
Article
Chemistry, Organic
Chun Wu, Yu Tian, Zunting Zhang, Tao Wang
Summary: A three-component reaction for the synthesis of 2-amino-2-butene-1,4-diones has been developed, which proceeds without the need for a catalyst or additive and produces the desired products with good to excellent yields. A plausible reaction pathway has been proposed and supported by control experiments.
TETRAHEDRON LETTERS
(2022)
Article
Chemistry, Applied
Yirong Dong, Yu Tian, Zunting Zhang, Tao Wang
Summary: We report a strategy for the preparation of 1,3-dicarbonyl sulfoxonium ylides from alpha-diazoketones and sulfoxonium ylides, demonstrating a wide substrate scope and functional group tolerance. A plausible mechanism for this transformation was proposed based on experimental results, and the synthetic utility of the products was explored.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Chemistry, Applied
Junying Wang, Jianghui Du, Tao Wang
Summary: The synthesis of 2-aminopyrrolo[1,2-b]pyridazines from 1,3-diynamides and 1-aminopyrroles via gold(I)-catalyzed chemoselective hydroamination/hydroarylation cascade was successfully achieved. A total of 26 examples were conducted to investigate the substrate scope, and a plausible reaction mechanism was proposed. Moreover, the fluorescence properties of the resulting products in both solution and solid states were explored.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Applied
Lixin Niu, Jinming Fan, Bo Liu, Ding Wang, Tao Wang, Zunting Zhang
Summary: A concise method for the synthesis of furan and benzene fused 2-tetralones via photo-induced rearrangement has been developed. The reaction mechanism involves several key steps including electrocyclization, [1,5]-H shift, [1,3]-H shift and keto-enol isomerization.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Organic
Jin Xi, Ding Wang, Jinxia Hu, Huan Shen, Tao Wang, Zunting Zhang
Summary: A method for synthesizing benzo[f]quinoline derivatives via photoinduced 6 pi-electrocyclization has been developed. The reaction conditions are mild, and the yields are high without the need for transition metal catalysts or additives.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Organic
Lixin Niu, Yun He, Jin Xi, Tao Wang, Yong Liang, Zunting Zhang
Summary: The method utilizes UV irradiation to achieve the synthesis of 6-phenylbenzo[h]quinolines without the need for transition metal catalyst and oxidant, offering high atom efficiency and mild reaction conditions.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)
Article
Chemistry, Organic
Wangxi Gao, Lixin Niu, Tao Wang, Yong Liang, Ding Wang, Zunting Zhang
Summary: A concise and environmentally friendly protocol has been developed for the synthesis of cis-dihydrochromenones and trans-dihydrochromenones in EtOH at room temperature. The described photorearrangement proceeded smoothly without the addition of any transition metals and additives, providing good yields. It is believed that the photorearrangement of 4-phenyl-3-arylcoumarins proceeds via 6 pi-electrocyclization, a [1,3]-hydrogen shift and keto-enol isomerization.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)