OXIDATIVE-DEGRADATION OF ORGANIC PHOTOCHROMES

Authors
MALATESTA V MILOSA M MILLINI R LANZINI L BORTOLUS P MONTI S
Citation
V. Malatesta et al., OXIDATIVE-DEGRADATION OF ORGANIC PHOTOCHROMES, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 246, 1994, pp. 303-310
Citations number
12
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
246
Year of publication
1994
Pages
303 - 310
Database
ISI
SICI code
1058-725X(1994)246:<303:OOOP>2.0.ZU;2-H
Abstract
Photo-oxidation of some representative spiropyrans and spiro-oxazines does not seem to involve singlet oxygen O-2((1) Delta g). The photochr omes rather behave, in the spiro and merocyanine form, as O-2((1) Delt a g) quenchers. Only a methoxy-nitro benzopyran derivative was found t o promote formation of singlet oxygen. Superoxide anion O-2(radical an ion) is likely the activated oxygen species responsible for their oxid ative photodegradation.