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Raman study of the effect of LiCl and CsCl on the resonance intermolecular coupling and the Fermi resonance of water
Author(s) -
Sokołowska Anna
Publication year - 1991
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.1250220508
Subject(s) - fermi resonance , chemistry , resonance (particle physics) , aqueous solution , overtone , intermolecular force , anisotropy , coupling constant , isotropy , analytical chemistry (journal) , nuclear magnetic resonance , coupling (piping) , electrolyte , raman spectroscopy , atomic physics , materials science , molecule , spectral line , physics , electrode , optics , astronomy , metallurgy , chromatography , organic chemistry , particle physics
Changes in the isotropic and anisotropic component contours of the H 2 O and D 2 stretching bands in aqueous solutions of LiCl and CsCl were studied within the entire accessible concentration range. The isotropic component contours were resolved into three constituents and the anisotropic contours into four. The resonance intermolecular coupling constants, V 1 for the ν 1 vibration and V 2 for the 2ν 2 overtone, and the Fermi resonance constant, W , of water were determined for solutions of various electrolyte concentrations. The added electrolytes were found to lower the V 1 and V 2 values. The Fermi resonance coupling constant decreased in aqueous LiCl solutions and was constant in CsCl solutions. The unperturbed ν 1 and 2ν 2 band positions of the LiCl solutions did not change. In the CsCl solutions, ν 1 shifted to lower frequencies and 2ν 2 to higher frequencies. A new component was found to appear in the anisotropic component for concentrated LiCl solutions, at 3550 cm −1 for H 2 O and 2590 cm −1 for D 2 O.