Visible-Light-Induced Two-Electron-Transfer Photoreductions on CdS: Effeects of Morphology

Article abstract of DOI:10.1021/j100365a002

Freshly prepared CdS suspensions (CdS-0) consisting of quantized particles and their loose aggregation catalyze photoreductions of aromatic ketones and olefins in methanol under visible light irradiation using triethylamine as sacrificial electron donor, yielding alcohols and dihydro compounds, respectively, which are more selective than photocatalysis of commercially available crystalline CdS (Aldrich) (CdS-Ald).Deuterium incorporation experiments in photolysis of dimethyl maleate in methanol-O-D revealed that CdS-0 catalyzes sequental two-electron-transfer photoreduction, affording dideuterated dimethyl succinate, while CdS-Ald induces both photoreduction and photoisomerization through disproportionation between one-electron-transfer-reduction intermediates, yielding much trideuterated dimethyl succinate and monodeuterated dimethyl fumarate and maleate.