Molecular Engineering of Conjugated Polybenzothiadiazoles for Enhanced Hydrogen Production by Photosynthesis
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- 作者：Can Yang ; Beatriz Chiyin Ma ; Linzhu Zhang ; Dr. Sen Lin ; Saman Ghasimi ; Prof. Katharina Landfester ; Dr. Kai A. I. Zhang and Prof. Xinchen Wang
- 刊名：Angewandte Chemie
- 出版年：2016
- 出版时间：August 1, 2016
- 年：2016
- 卷：128
- 期：32
- 页码：9348-9352
- 全文大小：917K
- ISSN：1521-3757
文摘
The search for metal-free organic photocatalysts for H2 production from water using visible light remains a key challenge. Reported herein is a molecular structural design of pure organic photocatalysts, derived from conjugated polybenzothiadiazoles, for photocatalytic H2 evolution using visible light. By alternating the substitution position of the electron-withdrawing benzothiadizole unit on the phenyl unit as a comonomer, various polymers with either one- or three-dimensional structures were synthesized and the effect of the molecular structure on their catalytic activity was investigated. Photocatalytic H2 evolution efficiencies up to 116 μmol h−1 were observed by employing the linear polymer based on a phenyl-benzothiadiazole alternating main chain, with an apparent quantum yield (AQY) of 4.01 % at 420 nm using triethanolamine as the sacrificial agent.