文献类型：期刊文献

英文题名：Xanthene Dye-Functionalized Conjugated Porous Polymers as Robust and Reusable Photocatalysts for Controlled Radical Polymerization

作者：Li, Xue[2];Zhang, Yu Chi[2];Zhao, Yujie[2];Zhao, Hong Peng[2];Zhang, Bin[1];Cai, Tao[2,3]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Wuhan Univ, Key Lab Biomed Polymers, Minist Educ, Coll Chem & Mol Sci, Wuhan 430072, Hubei, Peoples R China;[3]Wuhan Univ, Shenzhen Res Inst, Wuhan 430072, Hubei, Peoples R China

年份：2020

卷号：53

期号：5

起止页码：1550

外文期刊名：MACROMOLECULES

收录：;EI(收录号：20201008251240);WOS:【SCI-EXPANDED(收录号:WOS:000519337500005)】；

基金：The financial support from the National Natural Science Foundation of China (51773156 and 51703167), the Science and Technology Program of Shenzhen (JCYJ20170303170403122 and JCYJ20170303170340122), the Natural Science Foundation of Jiangsu Province (BK20170412), and the Fundamental Research Funds for the Central Universities, China, administered by Wuhan University (2042018kf0001) is acknowledged.

语种：英文

外文关键词：Light - Energy harvesting - Photobleaching - Transition metals - Catalysts - Polyethylene terephthalates - Solar energy - Atom transfer radical polymerization - Conjugated polymers

摘要：Photoinduced electron/energy transfer-reversible addition-fragmentation chain transfer (PET-RAFT) polymerization represents a versatile and highly efficient method for polymerizations of wide-ranging monomer variances upon solar energy harvesting. Although significant progress has been achieved, several drawbacks are still associated with existing photocatalysts, such as toxicity of transition metals, high cost, poor stability, and unavoidable purification procedures because of the photobleaching effect, to name a few. Herein, 1,4-diethynylbenzene-linked xanthene dye-conjugated porous polymers (CPPs) have been established as potential heterogenous photocatalysts of PET-RAFT polymerization. With this two-dimensional planar architecture, we demonstrate dual-stimuli toggling of RAFT polymerization using two different external physical manipulations: light "ON"/"OFF" and solution pH "LOW"/"HIGH". In addition, these CPPs endowed radical polymerizations with various impressive features such as compatibility of diverse monomer formulations, unique oxygen tolerance, and ppm-level catalyst dosage. Demonstrations of chain extension and catalyst recycling further highlight the robustness and performance of this CPP catalyst. Through the study of structure-property relationship using the experimental analyses, we envisage that a series of xanthene dye-functionalized CPPs can be developed as visible light-absorbing organocatalysts rivaling transition-metal photocatalysts.