Tuning Acceptor Length in Photocatalytic Donor-Acceptor Conjugated Polymers for Efficient Solar-to-Hydrogen Energy Conversion  

作　　者：Qian Li Jia Li Wen-Rui Wang Li-Na Liu Zi-Wen Xu Guanghui Xie Jingjing Li Jianhua Yao Wei-Shi Li 

机构地区：[1]The Education Ministry Key Laboratory of Resource Chemistry,Shanghai Normal University,Shanghai,200234 China [2]CAS Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules,Shanghai,Institute of Organic Chemistry,Chinese Academy of Sciences,345 Lingling Road,Shanghai,200032 China [3]CAS Key laboratory of Energy Regulation Materials,Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,345 Lingling Road,Shanghai,200032 China [4]Engineering Research Center of Zhengzhou for High Performance Organic Functional Materials,Zhengzhou University of Technology,6 Yingcai Street,Huiji District,Zhengzhou,Henan,450044 China

出　　处：《Chinese Journal of Chemistry》2022年第20期2457-2467,共11页中国化学（英文版）

基　　金：support from the National Natural Science Foundation of China(Nos.21674125,21672251,21975279,and 51761145043);the Strategic Priority Research Program of Ghines Asademy of Scienses(No,XDB20020000);Shanghai Institute of Organic Chemistry(No.sioczz202123);Zhengzhou University of Technology.

摘　　要：The development of conjugated polymer photocatalysts for efficient solar-to-hydrogen energy conversion is highly desirable for the sustainability of our society.Although the construction of donor-acceptor(D-A)structure in conjugated polymer photocatalysts for solar-to-hydrogen energy conversion has been well documented,less attention has been paid on how large D and how large A units combined together could achieve the best performance.Herein,a series of D-A copolymers P(BDT-DBTSOx)(x=7,19,39,and 79)composed of a benzodithiophene(BDT)donor unit and an oligomeric dibenzo[b,d]thiophene sulfone(DBTSO)acceptor segment were synthesized and studied.It was found that the polymer photocatalytic stabilities under full-arc irradiation improved upon shortening the length of the acceptor segment.Under visible light irradiation and in the presence of 3 wt%Pt cocatalyst,P(BDT-DBTSO79)displayed the best performance with an optimal hydrogen evolution rate of 119.3±5.8 mmol·g^(-1)·h^(-1).This is 1.4-fold as that of DBTSO homopolymer and 22.5-fold as that of BDT/DBTSO alternative copolymer,highlighting the importance of acceptor length in D-A structure for achieving high photocatalytic performance.

关 键 词：Photocatalysis Water splitting Solar-to-hydrogen energy conversion Conjugated polymers Donor-acceptor systems 

分 类 号：O63[理学—高分子化学]