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Vibrational relaxation study in carbonyl containing molecule: role of hydrodynamic and dispersion forces
Author(s) -
Devi T. Gomti
Publication year - 2008
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.1847
Subject(s) - raman spectroscopy , isotropy , chemistry , dilution , london dispersion force , dispersion (optics) , vibrational energy relaxation , molecule , relaxation (psychology) , solvent , polar , analytical chemistry (journal) , computational chemistry , molecular physics , thermodynamics , optics , chromatography , organic chemistry , physics , quantum mechanics , psychology , social psychology , van der waals force
The isotropic Raman component of the C = O stretching mode of ethyl acetate (EA) was analyzed using various polar and nonpolar solvents. It was found that the bandshape approaches towards Lorentzian at high dilution using the curve‐fitting method. The isotropic Raman band was also analyzed by estimating the correlation coefficient with reference to the Lorentzian lineshape using a simple method of linear‐curve fitting. The effects of dispersion and hydrodynamic forces on bandwidth were studied in details. The vibrational relaxation rate was studied using certain parameters and it was found that the microscopic based parameter can explain the complexities occurring in solute–solvent interactions. Copyright © 2007 John Wiley & Sons, Ltd.