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Synthesis of Stable Thiazole-Linked Covalent Organic Frameworks via a Multicomponent Reaction
journal contribution
posted on 2020-06-11, 18:33 authored by Kewei Wang, Zhifang Jia, Yang Bai, Xue Wang, Sophie E. Hodgkiss, Linjiang Chen, Samantha Y. Chong, Xiaoyan Wang, Haofan Yang, Yongjie Xu, Feng Feng, John W. Ward, Andrew I. CooperThe
development of robust synthetic routes to stable covalent organic
frameworks (COFs) is important to broaden the range of applications
for these materials. We report here a simple and efficient three-component
assembly reaction between readily available aldehydes, amines, and
elemental sulfur via a C–H functionalization and oxidative
annulation under transition-metal-free conditions. Five thiazole-linked
COFs (TZ-COFs) were synthesized using this method. These materials
showed high levels of crystallinity, high specific surface areas,
and excellent physicochemical stability. The photocatalytic applications
of TZ-COFs were investigated, and TZ-COF-4 gave high
sacrificial hydrogen evolution rates from water (up to 4296 μmol
h–1 g–1 under visible light irradiation)
coupled with high stability and recyclability, with sustained hydrogen
evolution for 50 h.
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thiazole-linked COFsTZ-COF -4oxidative annulationthree-component assembly reactionlight irradiationStable Thiazole-Linked Covalent Organic Frameworkstransition-metal-free conditionsmaterialhydrogen evolutionMulticomponent Reactionsurface areasphysicochemical stability50 hhydrogen evolution ratesphotocatalytic applications
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