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Preresonance Raman spectra of methylpyridines
Author(s) -
Kosmidis C.,
Bolovinos A.,
Tsekeris P.
Publication year - 1990
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.1250211106
Subject(s) - raman spectroscopy , excited state , chemistry , wavelength , vibronic coupling , spectral line , laser , intensity (physics) , vibronic spectroscopy , molecular physics , atomic physics , optics , physics , astronomy
Preresonance Raman spectra of methylpyridines (picolines) are presented for different incident laser wavelengths. A strong intensity variation of the non‐totally symmetric vibration 10α is observed, which implies a vibronic coupling of the lowest nπ* excited state with the next ππ* ( B 2u and B 1u ) states. In addition an intensity increase of some totally symmetric vibrations is observed and their possible implications for the geometry of the excited ππ* states are discussed.