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A comparative and mechanistic study on regioselective photooxidative demethylation of N-heterocyclics using TiO2 and molecular oxygen

✍ Scribed by Kambala V Subba Rao; Basavaraju Srinivas; Pierre Boule; Machiraju Subrahmanyam

Book ID
102330704
Publisher
Wiley (John Wiley & Sons)
Year
2002
Tongue
English
Weight
198 KB
Volume
77
Category
Article
ISSN
0268-2575

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✦ Synopsis

Abstract

Regioselective photooxidative demethylation of methyl‐substituted N‐containing heterocyclic compounds is investigated in non‐aqueous (ethane nitrile) solutions containing semiconductor oxide (TiO~2~) as photocatalyst in the presence of molecular oxygen upon irradiation at room temperature conditions. A plausible electron transfer mechanism, in which an electron‐hole pair is generated on the surface of TiO~2~ by illumination, is proposed for the semiconductor‐mediated photocatalysis. Molecular orbital calculation by the AM 1 method has been performed for the electron densities of N‐atoms of heterocyclics in the present study.

© 2002 Society of Chemical Industry

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