A Thienothiophene-Based Olefin-Linked Covalent Organic Framework for the Metal-Free Photocatalytic Oxidative Coupling of Amines

ACS Macro Letters, Journal Year: 2025, Volume and Issue: unknown, P. 278 - 283

Published: Feb. 15, 2025

The oxidative coupling of amines is a useful way to prepare many diverse compounds for the pharmaceutical and chemical industries. Covalent organic frameworks (COFs), crystalline class porous polymers, have emerged as promising heterogeneous photocatalysts that can accomplish this transformation under metal-free conditions due their excellent photochemical stability tunable electronic properties. Herein, we report optoelectronic photocatalytic properties an olefin-linked COF containing thienothiophene (TT) 2,4,6-trimethyl-1,3,5-triazine (TMT) units. TT-TMT-COF exhibited narrow band gap with extended light absorption charge separation, making it various benzylamines. fast reaction times, recyclability, conversions high ∼99%. reactivity was on par or significantly better than few small molecule 2,4,6-tris((E)-2-(thieno[3,2-b]thiophen-2-yl)vinyl)-1,3,5-triazine (TT-TMT) 2,4,6-tris((E)-2-(thiophen-2-yl)vinyl)-1,3,5-triazine (Thio-TMT) homogeneous catalytic systems similar functional This work further highlights ability perform efficient transformations in sustainable manner.

Language: Английский

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Photocatalytic detoxification of a sulfur mustard simulant by donor-enhanced porphyrin-based Covalent-Organic Frameworks

Nanoscale, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Porphyrin-based COF-OMe with a strong electron-donating group exhibited the highest photocatalytic activity among three COFs for detoxification of CEES in methanol solvent.

Language: Английский

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Visible-Light-Driven Photocatalytic Carbon–Carbon Coupling Reaction under Atmospheric Temperature and Pressure Conditions Using Hybrid Cu₂O–Pd Nanostructures

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Metal-catalyzed carbon-carbon (C-C) coupling reactions are important in the chemical industry. These conventionally carried out through fossil-fuel-derived heat-driven high-temperature catalytic processes. In this contribution, we report that Pd nanoclusters decorated on surface of quasi-spherical Cu2O (i.e., Cu2O-Pd) nanoparticles can successfully photocatalyze C-C reaction under ambient temperature and pressure conditions. Oxidative homocoupling phenylacetylene into diphenyl diacetylene is used as probe reaction. Based our results from transient reflection, density functional theory calculations, photoreactor studies, propose photocatalytic mechanism involves photon-excited electron transfer subsequent activation molecules by these excited electrons nanoclusters. The visible-light-driven approach demonstrated herein decarbonize processes industry since visible light input be supplied renewable energy resources.

Language: Английский

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Semiconducting Covalent Organic Frameworks

Chemical Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: May 14, 2025

Semiconductors form the foundational bedrock of modern electronics and numerous cutting-edge technologies. Particularly, semiconductors crafted from organic building blocks hold immense promise as next-generation pioneers, thanks to their vast array chemical structures, customizable frontier orbital energy levels bandgap easily adjustable π electronic properties. Over past 50 years, advancements in chemistry materials science have facilitated extensive investigations into small compounds, oligomers, polymers, resulting a rich library semiconductors. However, longstanding challenge persists: how organize units or chains well-defined which are crucial for performance Consequently, pursuit methodologies capable synthesizing and/or fabricating with ordered structures has emerged polymeric semiconductor research. In this context, covalent frameworks (COFs) stand out unique platforms allowing integration periodically thus facilitating development extended yet precisely defined architectures. Since initial report 2008, significant strides been made exploring various chemistries develop semiconducting COFs, properties, functions, applications. This review provides comprehensive focused exploration general structural features outlining basic principles design, illustrating linkage synthetic strategies based on typical one-pot polymerization reactions demonstrate growth bulk materials, nanosheets, films, membranes. By elucidating interactions between COFs entities such photons, phonons, electrons, holes, ions, molecules, spins, categorizes nine distinct sections: semiconductors, photoconductors, light emitters, sensors, photocatalysts, photothermal conversion electrocatalysts, storage electrodes, radical spin focusing disclosing structure-originated properties functions. Furthermore, scrutinizes structure-function correlations highlights features, breakthroughs, challenges associated COFs. Furnished knowledges state-of-the-art insights, predicts fundamental issues be addressed outlines future directions offering overview rapidly evolving remarkable field.

Language: Английский

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An Alkynyl-Based Olefin-linked Covalent Organic Framework as an Anode Material for Potassium-ion Batteries

Polymer, Journal Year: 2025, Volume and Issue: unknown, P. 128453 - 128453

Published: April 1, 2025

Language: Английский

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A guanidinium-based ionic COF for selective and efficient capture of 99TcO4−: A synergistic effect of ion exchange and hydrogen bond

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 359, P. 130841 - 130841

Published: Nov. 29, 2024

Language: Английский

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