Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (3): 456.doi: 10.7503/cjcu20190647

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Preparation of Novel Hydrophilic Conjugated Polymers and Their Applicationin Photocatalytic Hydrogen Evolution

LUO Wei,LIANG Youcai,HU Zhicheng,TANG Haoran,LIU Xiaocheng,XING Yetong,HUANG Fei   

  1. State Key Laboratory of Luminescent Materials, South China University of Technology, Guangzhou 510640, China
  • Received:2019-12-10 Online:2020-03-10 Published:2020-02-07
  • Contact: Fei HUANG
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.21634004);the Basic and Applied Basic Research Major Program of Guangdong Province, China(No.2019B030302007)

Abstract:

The application of organic conjugated polymers in photocatalytic hydrogen production has received increasing attention. However, most conjugated polymer photocatalysts showed unsatisfied photocatalytic hydrogen evolution, and the structure-performance relationship of conjugated polymers-based photocatalysts needs further exploration. In this study, we designed two conjugated polymers[poly({4, 8-bis[(2, 5, 8, 11, 14, 17, 20-heptaoxadocosan-22-yl)oxy]benzo[1, 2-b∶4, 5-b']dithiophene}-alt-[2, 5-di(thiazol-2-yl)pyrazine])(P7O-2N-2N) and poly({4, 8-bis[(2, 5, 8, 11, 14, 17, 20-heptaoxadocosan-22-yl)oxy]benzo[1, 2-b∶4, 5-b']dithiophene}-alt-[3, 6-di(thiophen-2-yl)-1, 2, 4, 5-tetrazine])(P7O-4N)] with hydrophilic side chains and nitrogen-contained heterocycles in backbones. The chemicals tructures and their influence on the absorption spectrum, energy level, free energy of hydrogen adsorption and photocatalytic performance of the material were systematically studied. The results showed that the conjugated polymer P7O-4N having a 3, 6-bis(thien-2-yl)-1, 2, 4, 5-tetrazine structure showed stronger inter-chain aggregation, lower hydrogen bonding free energy, and better photocatalytic hydrogen production performance than polymer P7O-2N-2N with 2, 5-bis(thiazole-2-yl)-pyrazide structure.

Key words: Conjugated polymer, Photocatalytic hydrogen evolution, Nitrogen-containing heterocycle, Hydrophilic side chain

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