PICOSECOND KINETICS AND REVERSE SATURABLE ABSORPTION OF MESOSUBSTITUTED TETRABENZOPORPHYRINS

Authors
CHEN PL TOMOV IV DVORNIKOV AS NAKASHIMA M ROACH JF ALABRAN DM RENTZEPIS PM
Citation
Pl. Chen et al., PICOSECOND KINETICS AND REVERSE SATURABLE ABSORPTION OF MESOSUBSTITUTED TETRABENZOPORPHYRINS, Journal of physical chemistry, 100(44), 1996, pp. 17507-17512
Citations number
36
Categorie Soggetti
Chemistry Physical
Journal title
Journal of physical chemistry → ACNP
ISSN journal
00223654
Volume
100
Issue
44
Year of publication
1996
Pages
17507 - 17512
Database
ISI
SICI code
0022-3654(1996)100:44<17507:PKARSA>2.0.ZU;2-C
Abstract
The mechanism of reverse saturable absorption of meso-substituted tetr abenzoporphyrins was studied by means of picosecond transient spectros copy. Characteristic (1)(pi,pi), (3)(pi,pi*), and (d,d) transitions h ave been observed. The kinetics of the excited states vary with metal substitution. The nonlinear transmission of benzoporphyrins was measur ed, and the excited-state absorption was determined to be the dominant optical limiting mechanism. The results agreed very well with a five- level model.