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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Photocatalytic Hydrogen Production on a sp²‐Carbon‐Linked Covalent Organic Framework

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(42)

Published: Aug. 27, 2022

Abstract Two‐dimensional covalent organic frameworks (2D‐COFs) have emerged as attractive platforms for solar‐to‐chemical energy conversion. In this study, we implemented a gradient heating strategy to synthesize sp 2 ‐carbon‐linked triazine‐based COF, COF‐JLU100, exhibiting high crystallinity, large surface area, good durability and carrier mobility solar‐driven photocatalytic hydrogen evolution. The Pt‐doped COF‐JLU100 demonstrated evolution rate of over 100 000 μmol g −1 h water splitting under visible‐light illumination (λ>420 nm). Experimental theoretical studies corroborate that the cyano‐vinylene segments in extend π‐delocalization enable fast charge transfer separation rates well dispersion water. Moreover, can be prepared by low‐cost easily available monomers has excellent stability, which is desirable practical production.

Language: Английский

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Recent Advances in the Use of Covalent Organic Frameworks as Heterogenous Photocatalysts in Organic Synthesis

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(24)

Published: Dec. 23, 2022

Abstract Organic photochemistry is intensely developed in the 1980s, which nature of excited electronic states and energy electron transfer processes are thoroughly studied finally well‐understood. This knowledge from molecular organic can be transferred to design covalent frameworks (COFs) as active visible‐light photocatalysts. COFs constitute a new class crystalline porous materials with substantial application potentials. Featured outstanding structural tunability, large porosity, high surface area, excellent stability, unique photoelectronic properties, potential candidates various research areas (e.g., photocatalysis). review aims provide state‐of‐the‐art insights into COF photocatalysts (pristine, functionalized, hybrid COFs) for transformations. The catalytic reaction mechanism COF‐based influence dimensionality crystallinity on heterogenous photocatalysis performance also discussed, followed by perspectives prospects main challenges opportunities future

Language: Английский

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A redox-active perylene-anthraquinone donor-acceptor conjugated microporous polymer with an unusual electron delocalization channel for photocatalytic reduction of uranium (VI) in strongly acidic solution

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 314, P. 121467 - 121467

Published: May 3, 2022

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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Porous organic polymers (POPs) for environmental remediation

Materials Horizons, Journal Year: 2023, Volume and Issue: 10(10), P. 4083 - 4138

Published: Jan. 1, 2023

Porous organic polymers show great potential for addressing environmental pollution challenges, including chemical sensing, wastewater treatment, toxic gas sorption, heterogeneous catalysis, and further promoting sustainable remediation strategies.

Language: Английский

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Enaminone‐Linked Covalent Organic Frameworks for Boosting Photocatalytic Hydrogen Production

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(31)

Published: May 31, 2023

Covalent organic frameworks (COFs), possessing pre-designable structures and tailorable functionalities, are promising candidates for photocatalysis. Nevertheless, the most studied imine-linked COFs (Im-COFs) usually suffer from unsatisfactory stability photocatalytic performance. To meet this challenge, a series of highly stable enaminone-linked (En-COFs) have been synthesized afford much improved visible-light-driven hydrogen production activities, ranging 44 to 1078 times that isoreticular Im-COFs, with only difference being linkages (enaminone vs. imine) in their structures. The enhanced light-harvesting ability, facilitated exciton dissociation chemical account superior activity. Furthermore, quinoline-linked (Qu-COFs) further obtained via post-modification Im-COFs. Compared activities Qu-COFs significantly after modification, but still below those corresponding En-COFs (3-107 times). facile synthesis, excellent activity, high demonstrate platform

Language: Английский

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Covalent organic frameworks and their composites as multifunctional photocatalysts for efficient visible-light induced organic transformations

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 472, P. 214774 - 214774

Published: Aug. 23, 2022

Language: Английский

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Covalent organic framework nanomedicines: Biocompatibility for advanced nanocarriers and cancer theranostics applications

Bioactive Materials, Journal Year: 2022, Volume and Issue: 21, P. 358 - 380

Published: Sept. 14, 2022

Nanomedicines for drug delivery and imaging-guided cancer therapy is a rapidly growing research area. The unique properties of nanomedicines have massive potential in solving longstanding challenges existing drugs, such as poor localization at the tumor site, high doses toxicity, recurrence, immune response. However, inadequate biocompatibility restricts their clinical translation. Therefore, advanced nanomaterials with enhanced therapeutic efficiency are highly desired to fast-track translation nanomedicines. Intrinsic nanoscale covalent organic frameworks (nCOFs), suitable size, modular pore geometry porosity, straightforward post-synthetic modification via simple transformations, make them incredibly attractive future ability COFs disintegrate slightly acidic microenvironment also gives competitive advantage targeted delivery. This review summarizes recently published applications delivery, photo-immuno therapy, sonodynamic photothermal chemotherapy, pyroptosis, combination therapy. Herein we mainly focused on modifications enhance biocompatibility, efficacy will provide fundamental knowledge designing biocompatible nCOFs-based help rapid development carriers theranostics.

Language: Английский

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Evolution of BODIPY as triplet photosensitizers from homogeneous to heterogeneous: The strategies of functionalization to various forms and their recent applications

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 482, P. 215074 - 215074

Published: Feb. 16, 2023

Language: Английский

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