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Crossing of anisotropic and isotropic Raman components in the intermolecular resonance coupling of vibrations
Author(s) -
Sokołowska Anna,
Kęcki Zbigniew
Publication year - 1993
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.1250240509
Subject(s) - isotropy , raman spectroscopy , anisotropy , intermolecular force , coincidence , chemistry , aqueous solution , rotational–vibrational coupling , vibration , coupling (piping) , resonance (particle physics) , nuclear magnetic resonance , computational chemistry , molecular physics , analytical chemistry (journal) , materials science , physics , atomic physics , molecule , organic chemistry , optics , quantum mechanics , medicine , alternative medicine , pathology , metallurgy
Changes in the frequencies of the anisotropic and isotropic components of the OH bands in the Raman spectrum of aqueous, methanolic and ethanolic solutions of LiCl were investigated. With increased concentrations of LiCl a crossing of the components i.e. exchange of their positions, was observed, and the non‐coincidence values Δν = ν aniso – ν iso of the OH bands changed from positive to decidely negative. The results obtained suggest that some revision of existing theories of non‐coincidence is desirable.