Semiconductor Photocatalysis: Quantised CdS-catalysed Photoformation of 1-Benzyl-1,4-dihydronicotinamide (BNAH) from 1-Benzylnicotinamide (BNA+)

DOI: 10.1039/ft9938901857

Source and publish data:

Journal of the Chemical Society - Faraday Transactions p. 1857 - 1860 (1993)

Update date:2022-08-05

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Authors:

Shiragami, Tsutomu

Fukami, Shinako

Pac, Chyongjin

Yanagida, Shozo

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Article abstract of DOI:10.1039/ft9938901857

Freshly prepared CdS suspensions (CdS-0) consisting of quantised particles and their loose aggregates catalyse the photoreduction of 1-benzylnicotinamide (BNA⁺) in water under visible-light irradiation using triethylamine (TEA) as a sacrificial electron donor.Isomeric dimers of (BNA)2 are also found as one-electron reduction products from BNA⁺, whereas the photocatalysis of commercially available CdS powder (Aldrich, CdS-Ald) leads only to the formation of the dimers.The formation of cadmium metal (Cd⁰) on the lattice is indispensable for the photoformation of BNAH, suggesting that the eventual two-electron reduction on irradiatio n of CdS-0 with TEA in water, should proceed through hydrogen atom transfer from Cd⁰-H formed on the lattice of CdS-0.

Full text of DOI:10.1039/ft9938901857

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