Dibenzothiophene‐S, S‐Dioxide‐Based Conjugated Polymers: Highly Efficient Photocatalyts for Hydrogen Production from Water under Visible Light. Issue 34 (24th July 2018)

• Record Type: Journal Article
• Authors: Dai, Chunhui; Xu, Shidang; Liu, Wei; Gong, Xuezhong; Panahandeh‐Fard, Majid; Liu, Zitong; Zhang, Deqing; Xue, Can; Loh, Kian Ping; Liu, Bin
• Is Part Of: Small. Volume 14:Issue 34(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-07-24
• Subjects: conjugated polymers -- dibenzothiophene‐S, S‐dioxide -- hydrogen production -- visible light irradiation; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201801839
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: 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. Abstract : 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.