Covalent organic frameworks (COFs) for electrochemical applications

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(12), P. 6871 - 6913

Published: Jan. 1, 2021

This review article summarizes the design principles and strategies for synthesis of functional COFs, with a special focus on their potential electrochemical applications.

Language: Английский

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Reconstructed covalent organic frameworks

Nature, Journal Year: 2022, Volume and Issue: 604(7904), P. 72 - 79

Published: April 6, 2022

Abstract Covalent organic frameworks (COFs) are distinguished from other polymers by their crystallinity 1–3 , but it remains challenging to obtain robust, highly crystalline COFs because the framework-forming reactions poorly reversible 4,5 . More chemistry can improve 6–9 this typically yields with poor physicochemical stability and limited application scope 5 Here we report a general scalable protocol prepare imine COFs, based on an unexpected framework reconstruction. In contrast standard approaches in which monomers initially randomly aligned, our method involves pre-organization of using removable covalent tether, followed confined polymerization. This reconstruction route produces reconstructed greatly enhanced much higher porosity means simple vacuum-free synthetic procedure. The increased improves charge carrier transport, leading sacrificial photocatalytic hydrogen evolution rates up 27.98 mmol h −1 g nanoconfinement-assisted strategy is step towards programming function materials through atomistic structural control.

Language: Английский

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Design Rules of Hydrogen-Bonded Organic Frameworks with High Chemical and Thermal Stabilities

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(24), P. 10663 - 10687

Published: June 8, 2022

Hydrogen-bonded organic frameworks (HOFs), self-assembled from strategically pre-designed molecular tectons with complementary hydrogen-bonding patterns, are rapidly evolving into a novel and important class of porous materials. In addition to their common features shared other functionalized materials constructed modular building blocks, the intrinsically flexible reversible H-bonding connections endow HOFs straightforward purification procedures, high crystallinity, solution processability, recyclability. These unique advantages have attracted considerable attention across broad range fields, including gas adsorption separation, catalysis, chemical sensing, electrical optical However, relatively weak interactions within can potentially limit stability potential use in further applications. To that end, this Perspective highlights recent advances development chemically thermally robust HOF systematically discusses relevant design rules synthesis strategies access highly stable HOFs.

Language: Английский

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Metal–organic frameworks and covalent organic frameworks as disruptive membrane materials for energy-efficient gas separation

Nature Nanotechnology, Journal Year: 2022, Volume and Issue: 17(9), P. 911 - 923

Published: Aug. 22, 2022

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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Two-dimensional biomaterials: material science, biological effect and biomedical engineering applications

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(20), P. 11381 - 11485

Published: Jan. 1, 2021

To date, nanotechnology has increasingly been identified as a promising and efficient means to address number of challenges associated with public health. In the past decade, two-dimensional (2D) biomaterials, unique nanoplatform planar topology, have attracted explosive interest in various fields such biomedicine due their morphology, physicochemical properties biological effect. Motivated by progress graphene biomedicine, dozens types ultrathin 2D biomaterials found versatile bio-applications, including biosensing, biomedical imaging, delivery therapeutic agents, cancer theranostics, tissue engineering, well others. The effective utilization stems from in-depth knowledge structure-property-bioactivity-biosafety-application-performance relationships. A comprehensive summary for is still lacking. this review, we aim concentrate on state-of-the-art particular focus applications. particular, discuss design, fabrication functionalization used diverse applications based up-to-date progress. Furthermore, interactions between systems spatial-temporal scale are highlighted, which will deepen understanding underlying action mechanism aiding design improved functionalities. Finally, taking bench-to-bedside focus, conclude review proposing current crucial issues/challenges presenting future development directions advance clinical translation these emerging biomaterials.

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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Facile construction of fully sp2-carbon conjugated two-dimensional covalent organic frameworks containing benzobisthiazole units

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

Published: Jan. 10, 2022

Abstract Developing a facile strategy for the construction of vinylene-linked fully π -conjugated covalent organic frameworks (COFs) remains huge challenge. Here, versatile condition Knoevenagel polycondensation constructing 2D COFs was explored. Three new examples ( BTH-1 , 2 3 ) containing benzobisthiazoles units as functional groups were successfully prepared under this and mild condition. The electron-deficient benzobisthiazole cyano-vinylene linkages both integrated into conjugated skeleton acted acceptor moieties. Interestingly, we found highly ordered D-A system is favorable photocatalytic activity. BTH-3 with benzotrithiophene donor strong effect exhibited an attractive HER 15.1 mmol h −1 g visible light irradiation.

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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Covalent organic frameworks towards photocatalytic applications: Design principles, achievements, and opportunities

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 475, P. 214882 - 214882

Published: Oct. 14, 2022

Language: Английский

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