Dibenzothiophene‐S,S‐Dioxide‐Based Conjugated Polymers: Highly Efficient Photocatalyts for Hydrogen Production from Water under Visible Light |
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| Authors: | Chunhui Dai Shidang Xu Wei Liu Xuezhong Gong Majid Panahandeh‐Fard Zitong Liu Deqing Zhang Can Xue Kian Ping Loh Bin Liu |
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| Affiliation: | 1. Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore;2. Department of Chemistry and Centre for Advanced 2D Materials, National University of Singapore, Singapore, Singapore;3. School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore;4. Nanoscience & Nanotechnology Initiative (NUSNNI)‐Nanocore, National University of Singapore, Singapore, Singapore;5. Beijing National Laboratory for Molecular Sciences, Organic Solids Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China |
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| 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. |
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| Keywords: | conjugated polymers dibenzothiophene‐S,S‐dioxide hydrogen production visible light irradiation |
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