Table of Contents
Laser Chemistry
Volume 19 (1999), Issue 1-4, Pages 187-190

Transient Raman Spectroscopy of Isotope-Substituted Species of Bacteriochlorophyll a, Bacteriopheophytin a And Chlorophyll a: Changes in the Bond Orders in the Macrocycles Upon Triplet and Singlet Excitation

Faculty of Science, Kwansei Gakuin University, Uegahara, Nishinomiya 662, Japan

Received 7 April 1997

Copyright © 1999 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The S0, T1 and S1 Raman spectra of bacteriochlorophyll a, bacteriopheophytin a and chlorophyll a were recorded for the species of natural abundance isotopic composition and those of totally substituted with 15N, 13C and 2H isotopes. Based on empirical assignments of the Raman lines, changes in the bond orders in the macrocycle upon triplet and singlet excitation are discussed.