CONVENIENT CHEMICAL ACTINOMETER WITH 2-HYDROXY-4'-METHOXYCHALCONE

Authors
MATSUSHIMA R MIZUNO H KAJIURA A
Citation
R. Matsushima et al., CONVENIENT CHEMICAL ACTINOMETER WITH 2-HYDROXY-4'-METHOXYCHALCONE, Bulletin of the Chemical Society of Japan, 67(6), 1994, pp. 1762-1764
Citations number
19
Categorie Soggetti
Chemistry
Journal title
Bulletin of the Chemical Society of Japan → ACNP
ISSN journal
00092673
Volume
67
Issue
6
Year of publication
1994
Pages
1762 - 1764
Database
ISI
SICI code
0009-2673(1994)67:6<1762:CCAW2>2.0.ZU;2-T
Abstract
The quantum yields for the photochemical conversion of 2-hydroxy-4'-me thoxychalcone into the flavylium ion are in the range of 0.25-0.35 in acetic acid and 0.14-0.2 in aqueous ethanol at pH 2, depending on the wavelength of UV light. The quantum yields are essentially constant ag ainst any changes in the light intensity, temperature, or substrate co ncentration, which is a favorable feature regarding use as a convenien t chemical actinometer. A one-photon mechanism involving excited-state proton-transferred tautomer is proposed.