Covalent organic frameworks for photocatalysis: Synthesis, structural features, fundamentals and performance

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 475, P. 214889 - 214889

Published: Oct. 15, 2022

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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Fabrication of Robust Covalent Organic Frameworks for Enhanced Visible-Light-Driven H₂ Evolution

ACS Catalysis, Journal Year: 2021, Volume and Issue: 11(4), P. 2098 - 2107

Published: Feb. 2, 2021

Developing photocatalysts capable of visible-light-driven water splitting to produce clean hydrogen (H2) is one the premier challenges for solar energy conversion into and sustainable fuels. Inspired from structure feature photosystem I in nature, we have designed synthesized a series robust covalent organic frameworks (NKCOFs = Nankai University COFs) based on electric donor–acceptor moieties, which electron-donor group pyrene can be used harvesting light. Meanwhile, benzothiadiazole with different functional groups was introduced as an electron acceptor tune light-adsorption ability COFs. Notably, activity NKCOF-108 photochemical H2 evolution under visible light among highest COFs without hybridization other materials. We attribute high rate its distinct structural features wide visible-light-response range. The highly ordered layered ensures that sufficient active sites are accessible production, design promote separation photogenerated carriers. Our findings provided effective strategy light-driven evolution.

Language: Английский

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Engineering Covalent Organic Frameworks as Heterogeneous Photocatalysts for Organic Transformations

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(47)

Published: Sept. 14, 2022

Abstract Covalent organic frameworks (COFs) are an emerging category of polymers with highly porous crystalline structures. In the last decade, reports on use COFs as heterogeneous photocatalysts for transformations have shown significant progress. Still, comprehensive reviews mechanisms photocatalytic using lacking. This Review provides a and systematic overview COF‐based transformations. Firstly, we discuss photophysical properties characterization methods photocatalysts. Then, general mechanism, advantages, strategies to improve efficiency summarized. After that, advanced examples analyzed regard underlying mechanisms. The ends critical perspective challenges prospects.

Language: Английский

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Advances of MOFs and COFs for photocatalytic CO2 reduction, H2 evolution and organic redox transformations

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 490, P. 215210 - 215210

Published: May 21, 2023

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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Natural Sunlight Photocatalytic Synthesis of Benzoxazole-Bridged Covalent Organic Framework for Photocatalysis

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(41), P. 18750 - 18755

Published: Oct. 10, 2022

Although natural sunlight-mediated photocatalysis is a clean, efficient, and green approach to access organic products, its application in the synthesis of covalent frameworks (COFs), however, still unprecedented. Herein, we first report sunlight photocatalytic COF under ambient conditions. Furthermore, this "window ledge" reaction generated benzoxazole-linked stable can be applied as reusable photocatalyst highly promote visible-light-driven aerobic oxidation sulfides sulfoxides. These results not only enrich synthetic methodology but also open new route COFs sustainable way.

Language: Английский

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Metal-Free Photocatalysis: Two-Dimensional Nanomaterial Connection toward Advanced Organic Synthesis

ACS Nano, Journal Year: 2021, Volume and Issue: 15(3), P. 3621 - 3630

Published: March 14, 2021

Two-dimensional (2D) nanostructures are a frontier in materials chemistry as result of their extraordinary properties. Metal-free 2D nanomaterials possess extra appeal due to improved cost-effectiveness and lower toxicity with respect many inorganic structures. The outstanding electronic characteristics some metal-free semiconductors have projected them into the world organic synthesis, where they can function high-performance photocatalysts drive sustainable synthesis high-value molecules. Recent reports on this topic inspired stream research opened up theme that we believe will become one most dominant trends forthcoming years.

Language: Английский

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Reticular framework materials for photocatalytic organic reactions

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(22), P. 7949 - 8004

Published: Jan. 1, 2023

Photocatalytic organic reactions, harvesting solar energy to produce high value-added chemicals, have attracted increasing attention as a sustainable approach address the global crisis and environmental issues. Reticular framework materials, including metal-organic frameworks (MOFs) covalent (COFs), are widely considered promising candidates for photocatalysis owing their crystallinity, tailorable pore environment extensive structural diversity. Although design synthesis of MOFs COFs been intensively developed in last 20 years, applications photocatalytic transformations still preliminary stage, making systematic summary necessary. Thus, this review aims provide comprehensive understanding useful guidelines exploration suitable MOF COF photocatalysts towards appropriate reactions. The commonly used reactions categorized facilitate identification reaction types. From practical viewpoint, fundamentals experimental design, active species, performance evaluation external conditions, discussed detail easy experimentation. Furthermore, latest advances COFs, composites, comprehensively summarized according actual sites, together with discussion structure-property relationship. We believe that study will be helpful researchers novel reticular various synthetic applications.

Language: Английский

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Covalent Organic Frameworks as Porous Pigments for Photocatalytic Metal-Free C–H Borylation

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(13), P. 7592 - 7599

Published: March 21, 2023

Covalent organic frameworks (COFs) are highly promising as heterogeneous photocatalysts due to their tunable structures and optoelectronic properties. Though COFs have been used photocatalysts, they mainly employed in water splitting, carbon dioxide reduction, hydrogen evolution reactions. A few examples synthesis using metal-anchored COF were reported. Herein, we report stable β-keto-enamine-based for metal-free C–B bond formation Three different availed this purpose. Their photocatalysis performances monitored 12 substrates, like quinolines, pyridines, pyrimidines. All the showcase moderate-to-high yields (up 96%) depending upon substrate's molecular functionality. High crystallinity, a large surface area, low band gap, suitable position result highest catalytic activity of TpAzo COF. The thorough mechanistic investigation further highlights crucial role light-harvesting capacity, charge separation efficiency, current density during catalysis. light absorbance capacity plays critical catalysis maximized near COF's absorption maxima. high photostability as-synthesized offers reusability several (>5) cycles.

Language: Английский

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