Premium
Resonance Raman spectra and excitation profiles of tetradesmethyl‐β‐Carotene
Author(s) -
Okamoto Hiromi,
Saito Shigeki,
Hamaguchi HiroO,
Tasumi Mitsuo,
Eugster Conrad H.
Publication year - 1984
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.1250150508
Subject(s) - overtone , isopentane , raman spectroscopy , excitation , resonance (particle physics) , excited state , spectral line , chemistry , laser , analytical chemistry (journal) , atomic physics , molecular physics , optics , physics , biochemistry , quantum mechanics , astronomy , chromatography , catalysis
Resonance Raman spectra of tetradesmethyl‐β‐carotene were recorded using nine laser lines in the visible region. In a KBr disk at 77 K, two strong fundamental bands (1523 and 1133 cm −1 ) and their overtone and combination bands were observed to the fifth overtone region. Excitation profiles of nine Raman bands, including overtone and combination bands, were measured in isopentane solutions at 185 K. These were simulated by a simple two‐dimensional model based on Albrecht's A ‐term, and a reliable set of parameters corresponding to the structure differences between the excited and ground electronic states was determined. The agreement between the observed and calculated excitation profiles was excellent, showing the adequacy of the model adopted.