MAGNETIC-FIELD AND ISOTOPE EFFECTS ON PHOTOCHEMISTRY OF CHAIN-LINKED COMPOUNDS CONTAINING BENZOPHENONE AND HYDROGEN-DONOR MOIETIES

Authors
NAKAGAKI R YAMAOKA M TAKAHIRA O HIRUTA K FUJIWARA Y TANIMOTO Y
Citation
R. Nakagaki et al., MAGNETIC-FIELD AND ISOTOPE EFFECTS ON PHOTOCHEMISTRY OF CHAIN-LINKED COMPOUNDS CONTAINING BENZOPHENONE AND HYDROGEN-DONOR MOIETIES, The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory, 101(4), 1997, pp. 556-560
Citations number
40
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
4
Year of publication
1997
Pages
556 - 560
Database
ISI
SICI code
1089-5639(1997)101:4<556:MAIEOP>2.0.ZU;2-M
Abstract
The magnetic field effects on the decay kinetics for chain-linked trip let biradicals have been observed by the use of a laser photolysis app aratus with a conventional electromagnet and a pulsed magnet. Biradica l lifetimes increase steeply to their maxima from the zero field to ca . 2 T. The biradical decay times tend to decrease gradually with furth er increase of the magnetic field intensity to 14 T. The decreased lif etimes for triplet biradicals can be explained in terms of spin-lattic e relaxation due to hyperfine anisotropy and to g tensor anisotropy.