TIME-RESOLVED RESONANCE RAMAN-SPECTRA OF FREE-BASE TETRAARYLPORPHYRINS - EFFECTS OF THE PERIPHERAL SUBSTITUENTS

Authors
JEOUNG SC KIM D AHN KH CHO DW YOON M
Citation
Sc. Jeoung et al., TIME-RESOLVED RESONANCE RAMAN-SPECTRA OF FREE-BASE TETRAARYLPORPHYRINS - EFFECTS OF THE PERIPHERAL SUBSTITUENTS, Chemical physics letters, 241(5-6), 1995, pp. 533-539
Citations number
25
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
Chemical physics letters → ACNP
ISSN journal
00092614
Volume
241
Issue
5-6
Year of publication
1995
Pages
533 - 539
Database
ISI
SICI code
0009-2614(1995)241:5-6<533:TRROFT>2.0.ZU;2-0
Abstract
Time-resolved resonance Raman spectra of free-base tetraarylporphyrins were obtained to investigate the peripheral substituent effect on the structural changes in the excited states. The aryl mode of H-2-tetrat oluylporphyrin in the excited triplet state was more strongly enhanced relative to that of H-2-tetramesitylporphyrin. These results are disc ussed in terms of the difference in the steric hindrance inhibiting th e electron delocalization of the porphyrin in the excited states.