Dibenzothiophene‐S,S‐Dioxide‐Based Conjugated Polymers: Highly Efficient Photocatalyts for Hydrogen Production from Water under Visible Light

Three dibenzothiophene‐S,S‐dioxide‐based alternating copolymers were synthesized by facile Suzuki polymerization for visible light–responsive hydrogen production from water (> 420 nm). Without addition of any cocatalyst, FluPh2‐SO showed a photocatalytic efficiency of 3.48 mmol h−1 g−1, while a l...

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Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2018-08, Vol.14 (34), p.e1801839-n/a
Main Authors: Dai, Chunhui, Xu, Shidang, Liu, Wei, Gong, Xuezhong, Panahandeh‐Fard, Majid, Liu, Zitong, Zhang, Deqing, Xue, Can, Loh, Kian Ping, Liu, Bin
Format: Article
Language:English
Subjects:
Charge transport
Chemical synthesis
conjugated polymers
Coplanarity
Dibenzothiophene
dibenzothiophene‐S,S‐dioxide
Dioxides
Hydrogen evolution
Hydrogen production
Nanotechnology
Steric hindrance
visible light irradiation
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Summary:Three dibenzothiophene‐S,S‐dioxide‐based alternating copolymers were synthesized by facile Suzuki polymerization for visible light–responsive hydrogen production from water (> 420 nm). Without addition of any cocatalyst, FluPh2‐SO showed a photocatalytic efficiency of 3.48 mmol h−1 g−1, while a larger hydrogen evolution rate (HER) of 4.74 mmol h−1 g−1 was achieved for Py‐SO, which was ascribed to the improved coplanarity of the polymer that facilitated both intermolecular packing and charge transport. To minimize the possible steric hindrance of FluPh2‐SO by replacing 9,9′‐diphenylfluorene with fluorene, Flu‐SO exhibited a more red‐shifted absorption than FluPh2‐SO and yielded the highest HER of 5.04 mmol h−1 g−1. This work highlights the potential of dibenzothiophene‐S,S‐dioxide as a versatile building block and the rational design strategy for achieving high photocatalytic efficiency. Three dibenzothiophene‐S,S‐dioxide‐based conjugated polymers are designed and synthesized for hydrogen production from water under visible light. All three polymers exhibit high photocatalytic efficiencies and the structure‐performance relationship of the polymers are systematically investigated.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.201801839