biostudies-literature00440Patel JFrench Infrastructure for Integrated Structural BiologyUniversité Paris-SaclayUniversité Paris-Sud7324-7328https://www.ebi.ac.uk/biostudies/studies/S-EPMC7480499biostudies-literatureUnknown11(28)In artificial photosynthesis, chemists are aiming to borrow principles from natural photosynthesis to develop photoelectrochemical cells (PEC) for water splitting. The water plastoquinone photo-oxidoreductase enzyme, also known as photosystem II, uses light to perform the four-electron, four-proton oxidation of water to dioxygen and stores reducing equivalents in reduced forms of quinones which are ultimately used in dark reactions for the synthesis of energy-rich molecules. We report a nano-structured semiconducting conjugated polymer based on poly(diphenylbutadiyne) (nano-PDPB) and its photocatalytic activities towards the water oxidation reaction under visible light irradiation when dispersed in water in the absence of any sacrificial agents or co-catalysts. Charge recovery at the nano-PDPB directly or delayed in time was exemplified by the reduction of quinone acting as a hydrogen reservoir. In the absence of quinones as electron acceptors H₂O₂ formation was detected, stemming from the partial reduction of O₂.Chemical scienceVisible light-driven simultaneous water oxidation and quinone reduction by a nano-structured conjugated polymer without co-catalysts.PMC7480499ANR-10-INSB-05-01Aukauloo ARemita HLeibl WMarinho SMYuan XPatel J44falseVisible light-driven simultaneous water oxidation and quinone reduction by a nano-structured conjugated polymer without co-catalysts.In artificial photosynthesis, chemists are aiming to borrow principles from natural photosynthesis to develop photoelectrochemical cells (PEC) for water splitting. The water plastoquinone photo-oxidoreductase enzyme, also known as photosystem II, uses light to perform the four-electron, four-proton oxidation of water to dioxygen and stores reducing equivalents in reduced forms of quinones which are ultimately used in dark reactions for the synthesis of energy-rich molecules. We report a nano-structured semiconducting conjugated polymer based on poly(diphenylbutadiyne) (nano-PDPB) and its photocatalytic activities towards the water oxidation reaction under visible light irradiation when dispersed in water in the absence of any sacrificial agents or co-catalysts. Charge recovery at the nano-PDPB directly or delayed in time was exemplified by the reduction of quinone acting as a hydrogen reservoir. In the absence of quinones as electron acceptors H₂O₂ formation was detected, stemming from the partial reduction of O₂.2020-01-01T00:00:00Z2020 Jul2024-12-04T13:11:32.907Z2020-09-21T07:01:57ZS-EPMC74804993295303510.1039/d0sc02122a