Covalent organic frameworks

Nature Reviews Methods Primers, Journal Year: 2023, Volume and Issue: 3(1)

Published: Jan. 12, 2023

Language: Английский

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Metalated covalent organic frameworks: from synthetic strategies to diverse applications

Chemical Society Reviews, Journal Year: 2022, Volume and Issue: 51(15), P. 6307 - 6416

Published: Jan. 1, 2022

This review highlights the recent advances of metalated covalent organic frameworks, including synthetic strategies and applications, discusses current challenges future directions.

Language: Английский

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Landscaping Covalent Organic Framework Nanomorphologies

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(26), P. 11482 - 11498

Published: June 27, 2022

The practical utilization of covalent organic frameworks (COFs) with manipulation at the atomic and molecular scale often demands their assembly on nano-, meso-, macroscale precise control. Consequently, synthetic approaches that establish ability to control nucleation growth COF crystallites self-assembly desired nanomorphologies have drawn substantial attention from researchers. On basis dimensionality morphologies, we can categorize them into zero- (0-D), one- (1-D), two- (2-D), three-dimensional (3-D) nanomorphologies. In this perspective, summarize reported strategies enable nanomorphologies' size, shape, reveal impact dimensionalities in physicochemical properties applications. aim is a synergistic optimization morphological while keeping micro- or mesoporosity, crystallinity, chemical functionalities COFs perspective. A detailed knowledge along way should help us enrich performance variety applications like catalysis, separation, sensing, drug delivery, energy storage, etc. We discussed interlinking between via transmutation dimensionalities. Such could lead variation during transition. Finally, concept constructing superstructures through combination two more has been explored, it bring up opportunities for developing next-generation innovative materials multidisciplinary

Language: Английский

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2D Conjugated Covalent Organic Frameworks: Defined Synthesis and Tailor-Made Functions

Accounts of Chemical Research, Journal Year: 2022, Volume and Issue: 55(6), P. 795 - 808

Published: Jan. 13, 2022

ConspectusCovalent organic frameworks (COFs) are an emerging class of crystalline porous polymers and have received tremendous attention research interest. COFs can be classified into two-dimensional (2D) three-dimensional (3D) analogues. Resembling the architectures graphene, 2D conjugated exhibited promising prospects in many fields, such as gas storage separation, heterogeneous catalysis, sensing, photocatalysis, environmental remediation, drug delivery, energy conversion, so forth. However, efficient structural design for high-throughput production remains challenging.In this Account, we summarize our recent contributions to design, synthesis, application exploration COFs. First, raised "two-in-one" strategy facile synthesis imine with good reproducibility solvent adaptability. Thanks elaborate molecular strategy, could easily modulate topology fabricate COF films. In addition, developed two approaches stabilize by using planar building blocks donor-acceptor structures. We also proposed a skeleton engineering electrode materials, through which redox-active orthoquinone moieties were stepwise-incorporated skeletons isostructural imine-linked This enabled systematic investigations on series analogous structures but different numbers active sites storage, provides platform unveil underlying structure-property relationships. recently new kind arylamine-linked The electroactive diphenylamine linkages endowed these extended conjugation improved stability, conferred excellent pseudocapacitive performance. Moreover, tailor-made sulfur-rich introduced that synthesized selective introduction polysulfide or sulfonyl groups used Li proton conduction. At end, key challenges toward practical applications their future suggested. hope Account will evoke inspirations innovative work field near future, especially some burgeoning interdisciplinary areas.

Language: Английский

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Constitutional isomerism of the linkages in donor–acceptor covalent organic frameworks and its impact on photocatalysis

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: Oct. 23, 2022

When new covalent organic frameworks (COFs) are designed, the main efforts typically focused on selecting specific building blocks with certain geometries and properties to control structure function of final COFs. The nature linkage (imine, boroxine, vinyl, etc.) between these naturally also defines their properties. However, besides type, orientation, i.e., constitutional isomerism linkages, has rarely been considered so far as an essential aspect. In this work, three pairs constitutionally isomeric imine-linked donor-acceptor (D-A) COFs synthesized, which different in orientation imine bonds (D-C=N-A (DCNA) D-N=C-A (DNCA)). isomers show substantial differences photophysical consequently photocatalytic performance. Indeed, all DCNA enhanced H2 evolution performance than corresponding DNCA Besides shown here, it can be concluded that proposed concept linkages is quite universal should when designing tuning

Language: Английский

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Porous materials for capture and catalytic conversion of CO2 at low concentration

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 465, P. 214576 - 214576

Published: April 29, 2022

Language: Английский

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Ionic Covalent Organic Frameworks for Energy Devices

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(52)

Published: Oct. 8, 2021

Covalent organic frameworks (COFs) are a class of porous crystalline materials whose facile preparation, functionality, and modularity have led to their becoming powerful platforms for the development molecular devices in many fields (bio)engineering, such as energy storage, environmental remediation, drug delivery, catalysis. In particular, ionic COFs (iCOFs) highly useful constructing devices, functional groups can transport ions efficiently, nonlabile ordered all-covalent pore structures backbones provide ideal pathways long-term under harsh electrochemical conditions. Here, current research progress on use iCOFs specifically lithium-based batteries fuel cells, is reviewed terms iCOF backbone-design strategies, synthetic approaches, properties, engineering techniques, applications. categorized anionic or cationic COFs, how each these types lithium ions, protons, hydroxides illustrated. Finally, challenges future opportunities utilization described. This review will therefore serve reference state-of-the-art design application strategies focusing devices.

Language: Английский

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Single-Crystalline Imine-Linked Two-Dimensional Covalent Organic Frameworks Separate Benzene and Cyclohexane Efficiently

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(43), P. 19813 - 19824

Published: Oct. 20, 2022

Two-dimensional (2D) covalent organic frameworks (COFs) are composed of structurally precise, permanently porous, layered macromolecular sheets, which traditionally synthesized as polycrystalline solids with crystalline domain lengths smaller than 100 nm. Here, we polymerize imine-linked 2D COFs suspensions faceted single crystals in little 5 min at moderate temperature and ambient pressure. Single two were prepared, consisting a rhombic COF (TAPPy-PDA) hexagonal (TAPB-DMPDA). The sizes TAPPy-PDA TAPB-DMPDA tuned from 720 nm to 4 μm 450 20 width, respectively. High-resolution transmission electron microscopy revealed that the consist layered, polymers comprising single-crystalline domains. Continuous rotation diffraction resolved unit cell crystal structure both COFs, a-b plane but disordered stacking c dimension. incorporated into gas chromatography separation columns exhibited unusual selective retention cyclohexane over benzene, significantly outperforming TAPB-DMPDA. Polycrystalline no separation, while poor opposite order elution, retaining benzene more cyclohexane, indicating importance improved material quality for exhibit properties derive their structures. This work represents first example synthesizing pressure short reaction times demonstrates promise high-quality molecular separations.

Language: Английский

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Structure–performance correlation guided applications of covalent organic frameworks

Materials Today, Journal Year: 2022, Volume and Issue: 53, P. 106 - 133

Published: Feb. 25, 2022

Language: Английский

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Growing single crystals of two-dimensional covalent organic frameworks enabled by intermediate tracing study

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: March 16, 2022

Resolving single-crystal structures of two-dimensional covalent organic frameworks (2D COFs) is a great challenge, hindered in part by limited strategies for growing high-quality crystals. A better understanding the growth mechanism facilitates development methods to grow 2D COF single Here, we take different perspective explore process tracing intermediates. We discover two mechanisms, nucleation and self-healing, which self-assembly pre-arrangement monomers oligomers are important factors obtaining highly crystalline COFs. These findings enable us micron-sized Py-1P. The crystal structure Py-1P successfully characterized three-dimensional electron diffraction (3DED), confirms that does, part, adopt widely predicted AA stacking structure. In addition, find majority crystals (>90%) have previously unknown structure, containing 6 layers within one unit cell.

Language: Английский

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