ANOMALOUS TRIPLET MECHANISM SPIN POLARIZATION-INDUCED BY THE ADDITIONOF HYDROCHLORIC-ACID IN THE PHOTOCHEMICAL SYSTEM OF XANTHONE IN ALCOHOL

Authors
KOGA T OHARA K KUWATA K MURAI H
Citation
T. Koga et al., ANOMALOUS TRIPLET MECHANISM SPIN POLARIZATION-INDUCED BY THE ADDITIONOF HYDROCHLORIC-ACID IN THE PHOTOCHEMICAL SYSTEM OF XANTHONE IN ALCOHOL, The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory, 101(43), 1997, pp. 8021-8025
Citations number
38
Categorie Soggetti
Chemistry Physical
Journal title
The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory → ACNP
ISSN journal
10895639
Volume
101
Issue
43
Year of publication
1997
Pages
8021 - 8025
Database
ISI
SICI code
1089-5639(1997)101:43<8021:ATMSPB>2.0.ZU;2-U
Abstract
The hydrochloric-acid-addition effect on the photochemical reaction of xanthone in alcohol is studied by a time-resolved ESR technique. The CIDEP spectra of the transient radicals peculiarly reveal an enhanced absorption by the addition of hydrochloric acid, while the ordinary tr iplet mechanism of xanthone is known to be emissive. The spin-polariza tion inversion phenomenon is explained by the triplet mechanism induce d by the excitation of a ground-state weak charge-transfer complex of xanthone and HCl.