Premium
Molecular Engineering of Fully Conjugated sp 2 Carbon‐Linked Polymers for High‐Efficiency Photocatalytic Hydrogen Evolution
Author(s) -
Huang Tao,
Lin Xi,
Liu Yang,
Zhao Jiwu,
Lin Huan,
Xu Ziting,
Zhong Shuncong,
Zhang Chunjie,
Wang Xuxu,
Fu Xianzhi,
Long Jinlin
Publication year - 2020
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201903334
Subject(s) - conjugated system , photocatalysis , polymer , photochemistry , materials science , electron acceptor , quantum yield , phenylene , triazine , acceptor , carbon fibers , polymer chemistry , chemistry , organic chemistry , catalysis , fluorescence , physics , quantum mechanics , composite number , composite material , condensed matter physics
The diverse nature of organic precursors offers a versatile platform for precisely tailoring the electronic properties of semiconducting polymers. In this study, three fully conjugated sp 2 carbon‐linked polymers have been designed and synthesized for photocatalytic hydrogen evolution under visible‐light illumination, by copolymerizing different C 3 ‐symmetric aromatic aldehydes as knots with the 1,4‐phenylene diacetonitrile (PDAN) linker through a C=C condensation reaction. The hydrogen evolution (HER) is achieved at a maximum rate of 30.2 mmol g −1 h −1 over a polymer based on 2,4,6‐triphenyl‐1,3,5‐triazine units linked by cyano‐substituted phenylene, with an apparent quantum yield (AQY) of 7.20 % at 420 nm. Increasing the degree of conjugation and planarity not only extends visible‐light absorption, but also stabilizes the fully conjugated sp 2 ‐carbon‐linked donor–acceptor (D–A) polymer. Incorporating additional electron‐withdrawing triazine units into the D–A polymer to form multiple electron donors and acceptors can greatly promote exciton separation and charge transfer, thus significantly enhancing the photocatalytic activity.