Donor-acceptor conjugated polymers based on benzo[1,2-b:4,5-b] dithiophene-1,1,5,5- tetraoxide for photocatalytic hydrogen evolution from water Liang Luo, Richard Lyons, Tao Liu, Little Mark, Andrew I.Cooper Department of Chemistry and Material Innovation Factory, University of Liverpool, Crown Street, Facile functionalization of benzo [1,2-b:4,5-b] dithiophene-1,1,5,5- tetraoxide (BDTO) through bromination is developed to incorporate it into polymers as an electron accepting unit. A series of linear donor-acceptor polymers in which BDTO acts as electron acceptor and phenylene, pyrene, fluorene, carbazole, dibenzothiophene are electron donors respectively, were synthesized through Suzuki-Miyaura cross-coupling polymerization. All prepared polymers showed activity for photocatalytic hydrogen evolution from water in the presence of sacrificial electron donor and copolymer of BDTO with phenylene exhibited the highest hydrogen evolution rate of 5.395 mmol h -1 g -1 . The correlation between activity and properties such as optical gap, band edge position and hydrophilicity were systematically studied. Liverpool L69 7ZD, U. K. aicooper@liverpool.ac.uk
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