Jinfeng Wang , Hongjie Yang , Rui Zhao , Linxi Hou
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引用次数: 0
摘要
共价有机框架(COF)是理想的异质光催化平台,由于其结构清晰明确,骨架可预先定制,因此提供了令人着迷的操作空间。本文报告了一种亚胺基 COF Im-oMe,它具有 N 和 O 位点,可以通过骨架局部区域的配位键将铜离子整合在一起,用于水相中的有氧光诱导电子/能量转移原子转移自由基聚合(PET-ATPR)。锚定铜离子的 Cu@Im-oMe 能够引发骨架局部极化效应,产生更大的偶极矩驱动力,促进电荷分离和传输,从而提高其光聚合性能。同时,该体系不需要额外添加过渡金属卤化物,在循环 3 次后仍具有很高的活性。本研究成果拓展了异质光催化剂的可行设计方法和策略,可用于在露天环境中精确生产聚合物。
In-situ charge polarization effect of copper(II) ion-coordination covalent organic framework induced aerobic PET-ATRP in aqueous phase
Covalent organic frameworks (COFs) are ideal heterogeneous photocatalytic platforms offering fascinating spaces for manipulation given their clearly defined structures along with pre-customizable skeletons. Herein, an imine-based COF Im-oMe featuring N and O sites allowing the integration of CuII ions via coordination bonds in local regions of the skeleton is reported for aerobic photoinduced electron/energy transfer atom transfer radical polymerization (PET-ATRP) in the aqueous phase. CuII@Im-oMe of anchored CuII ions is capable of triggering skeleton localized polarization effects, producing greater dipole moment driving force and facilitating the charge separation and transport to enhance its photopolymerization performance. Meanwhile, the system does not require additional addition of transition metal halides, and remains highly active after 3 cycles. The present work expands the feasible design methods and strategies of heterogeneous photocatalysts available for precision production of polymers in open-air environments.
期刊介绍:
The Journal of Catalysis publishes scholarly articles on both heterogeneous and homogeneous catalysis, covering a wide range of chemical transformations. These include various types of catalysis, such as those mediated by photons, plasmons, and electrons. The focus of the studies is to understand the relationship between catalytic function and the underlying chemical properties of surfaces and metal complexes.
The articles in the journal offer innovative concepts and explore the synthesis and kinetics of inorganic solids and homogeneous complexes. Furthermore, they discuss spectroscopic techniques for characterizing catalysts, investigate the interaction of probes and reacting species with catalysts, and employ theoretical methods.
The research presented in the journal should have direct relevance to the field of catalytic processes, addressing either fundamental aspects or applications of catalysis.