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Polystyrene-based eosin-Y as a photocatalyst for solar light-mediated NADH/NADPH regeneration and organic transformations

Singh, P and Chaubey, S and Singh, C and Singh, S and Yadav, RK and Singh, AP and Subhash, PD and Tiwari, D and Gupta, NK and Kim, TW (2023) Polystyrene-based eosin-Y as a photocatalyst for solar light-mediated NADH/NADPH regeneration and organic transformations. In: Reaction Chemistry and Engineering .

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Official URL: https://doi.org/10.1039/d2re00203e


The development of a highly efficient, polymer-based photocatalyst for the solar light-mediated photocatalytic reaction is a key challenge in this era. In this study, we report an aminomethyl-polystyrene-based eosin-Y (PBE) solar light active photocatalyst in which polystyrene is covalently bonded to the light-harvesting organic dye, eosin-Y, by the condensation method. The covalent attachment of eosin-Y and polystyrene would enhance the molar extension coefficient and light-harvesting properties, making it serve as a more efficient photocatalyst than the pristine polystyrene. The new PBE photocatalyst exhibited excellent efficiencies for NADH/NADPH regenerations with yields of 65.19 and 75.56, respectively, and for the synthesis of sulfoxide from alkenes and thiophenol it exhibited high yield and selectivity (99.8). The optical character of the as-synthesized photocatalyst was characterized by density functional theory and optical spectroscopy. From these experimental analyses, it was expected that the formation of a charge-transferred state would facilitate the improvement of solar absorption ability and light-harvesting properties in the PBE photocatalyst. Moreover, the PBE photocatalyst can be reused more than six times without the degradation of the photocatalytic activity, confirming that PBE is a highly stable and reusable photocatalyst. Therefore, the current research work brings new insights into the potential application of the PBE photocatalyst in the field of solar light-mediated nicotinamide cofactor regeneration, along with organic transformations. © 2023 The Royal Society of Chemistry.

Item Type: Journal Article
Publication: Reaction Chemistry and Engineering
Publisher: Royal Society of Chemistry
Additional Information: The copyright for this article belongs to Royal Society of Chemistry.
Keywords: Computer software reusability; Density functional theory; Electron transitions; Harvesting; Photocatalytic activity; Rate constants; Solar light, Covalently bonded; Eosin Y; Light harvesting properties; Light-harvesting; NADPH regeneration; Organic dye; Organic transformations; Photocatalytic reactions; Polymer based; Solar light, Polystyrenes
Department/Centre: Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA)
Date Deposited: 14 Mar 2023 07:06
Last Modified: 14 Mar 2023 07:06
URI: https://eprints.iisc.ac.in/id/eprint/80993

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