SENSITIZED PHOTOOXIDATION OF 2,3-DIHYDROXYNAPHTHALENES AND 2,7-DIHYDROXYNAPHTHALENES IN ALKALINE WATER

Authors
AMATGUERRI F CARRASCOSO M LUIZ M SOLTERANN AT BIASUTTI A GARCIA NA
Citation
F. Amatguerri et al., SENSITIZED PHOTOOXIDATION OF 2,3-DIHYDROXYNAPHTHALENES AND 2,7-DIHYDROXYNAPHTHALENES IN ALKALINE WATER, Journal of photochemistry and photobiology. A, Chemistry, 113(3), 1998, pp. 221-224
Citations number
29
Categorie Soggetti
Chemistry Physical
Journal title
Journal of photochemistry and photobiology. A, Chemistry → ACNP
ISSN journal
10106030
Volume
113
Issue
3
Year of publication
1998
Pages
221 - 224
Database
ISI
SICI code
1010-6030(1998)113:3<221:SPO2A2>2.0.ZU;2-M
Abstract
The Rose Bengal sensitized photooxidation of 2,3-dihydroxynaphthalene (2,3-DHN) and 2,7-dihydroxynaphthalene (2,7-DHN) in pH 12 water yields 1,1'-dimeric products, the appearance of which can be explained by th e coupling of radicals formed by primary electron transfer from the an ionic form of each starting dihydroxynaphthalene to singlet molecular oxygen or to the excited sensitizer. The dimer from 2,7-DHN is further oxidised during the irradiation to 6,7-dihydroxyperylene-1,12-quinone (DHPQ). In the case of 2,3-DHN, phthalic acid has also been detected. (C) 1998 Elsevier Science S.A.