T. Shiragami et al., SEMICONDUCTOR PHOTOCATALYSIS - QUANTIZED CDS-CATALYZED PHOTOFORMATIONOF 1-BENZYL-1,4-DIHYDRONICOTINAMIDE (BNAH) FROM 1-BENZYLNICOTINAMIDE (BNA+), Journal of the Chemical Society. Faraday transactions, 89(11), 1993, pp. 1857-1860
Citations number
23
Categorie Soggetti
Chemistry Physical","Physics, Atomic, Molecular & Chemical
Freshly pepared CdS suspensions (CdS-0) consisting of quantised partic
les and their loose aggregates catalyse the photoreduction of 1-benzyl
nicotinamide (BNA+) in water under visible-light irradiation using tri
ethylamine (TEA) as a sacrificial electron donor. Isomeric dimers of (
BNA)2 are also found as one-electron reduction products from BNA+, whe
reas the photocatalysis of commercially available CdS powder (Aldrich,
Cds-Ald) leads only to the formation of the dimers. The formation of
cadmium metal (Cd(o)) on the lattice Is indispensable for the photofor
mation of BNAH, suggesting that the eventual two-electron reduction on
irradiation of CdS-0 with TEA in water, should proceed through hydrog
en atom transfer from Cd(o)-H formed on the lattice of CdS-0.