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Pulsed laser induced vibrational resonance Raman scattering of chlorophyll a dimers
Author(s) -
de Wilton A.,
Haley L. V.,
Koningstein J. A.
Publication year - 1983
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250140415
Subject(s) - raman spectroscopy , resonance (particle physics) , raman scattering , chemistry , excited state , exciton , excitation , dimer , analytical chemistry (journal) , laser , absorption band , coherent anti stokes raman spectroscopy , molecular physics , materials science , atomic physics , optics , physics , organic chemistry , quantum mechanics , chromatography
The pulsed laser induced Raman spectrum of dry chlorophyll a (Chl a ) in hexane is reported. This sample is excited with a wavelength which is in resonance with an absorption band of the Chl a dimer at 432 nm. The observed resonance Raman excitation profile for several Raman bands shows that two electronic origins of the dimer are located at 434.1 and 435.4 nm and these are assigned to a pair of pseudo exciton levels. Features of this excitation profile are used to discuss the observed Raman spectra.