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Resonance Raman spectroscopy as a test of ab initio methods for the computation of molecular potential energy surfaces
Author(s) -
Hudson Bruce S.,
Markham Laura M.
Publication year - 1998
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/(sici)1097-4555(199806)29:6<489::aid-jrs269>3.0.co;2-5
Subject(s) - ab initio , raman spectroscopy , resonance (particle physics) , excited state , chemistry , resonance raman spectroscopy , ab initio quantum chemistry methods , ground state , raman scattering , molecular physics , spectral line , atomic physics , computational chemistry , molecule , physics , quantum mechanics , organic chemistry
The use of ab initio quantum chemical methods to aid in the interpretation of resonance Raman spectra is illustrated with examples where the resonant electronic absorption spectra are unstructured. In such cases only the gradient of the excited electronic state potential energy surface at the ground electronic state geometry is important in determining the upper state dynamics that are relevant to the Raman scattering process. The use of ab initio methods for which analytic gradients are available permits application to large molecular systems and to cluster models of molecules in solution. This procedure eliminates possible ambiguities in the empirical interpretation of resonance Raman spectra. These same ab initio methods may be used to provide descriptions of the ground‐state normal modes and the effect of isotopic substitution on the form of the normal modes. © 1998 John Wiley & Sons Ltd.