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The effect of excited state absorption of dimeric chlorophyll on the Raman spectrum of the solvent
Author(s) -
Koningstein J. A.
Publication year - 1989
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.1250200205
Subject(s) - raman spectroscopy , chemistry , excited state , photochemistry , solvent , picosecond , absorption (acoustics) , analytical chemistry (journal) , absorption spectroscopy , dimer , population , absorption band , laser , materials science , atomic physics , optics , organic chemistry , physics , demography , sociology , composite material
Pulsed laser‐induced Raman spectra of dimeric chlorophyll α in the solvent hexane are reported where the wavelength of the exciting radiation is in resonance with the position of the Soret band of the solute. As a result of the occurrence of effective population saturation of nanosecond‐ and picosecond‐lived S 1 and S 3 excited states of the dimer, changes take place in the absorption spectrum of the irradiated part of the solution from which Raman emission of the solvent occurs. The intensity of the observed Raman bands of hexane of different shifts are influenced in a different way by the change in the transmission of the medium. A correlation is made of these changes and the said Raman intensities.