title: Solvent dependent frequency shift and Raman noncoincidence effect of S=O stretching mode of Dimethyl sulfoxide in liquid binary mixtures.
abstract: The isotropic and anisotropic Raman peak frequencies of S=O stretching mode of Dimethyl sulfoxide (DMSO) have been discussed in different chemical and isotopic solvent molecules using different mechanisms. The shifting of peak frequency in further dilution of DMSO with solvent molecule is observed for all solvents. Transition dipole - transition dipole interaction and hydrogen bonding may play a major role in shifting of peak frequencies. The non-coincidence effect (NCE) of DMSO was determined for all the solvents and compared with four theoretical models such as McHale's model, Mirone's modification of McHale's model, Logan's model and Onsager-Fröhlich dielectric continuum model respectively. Most of the theoretical models are largely consistent with our experimental data.
authors.affiliation: Department of Physics, North-Eastern Regional Institute of Science and Technology, Arunachal Pradesh 791 109, India.
authors.forename: Ganesh
authors.initials: G
authors.lastname: Upadhyay
authors.forename: Th Gomti
authors.initials: TG
authors.lastname: Devi
authors.forename: Ranjan K
authors.initials: RK
authors.lastname: Singh
authors.forename: A
authors.initials: A
authors.lastname: Singh
authors.forename: P R
authors.initials: PR
authors.lastname: Alapati
mesh_terms: D016880:Anisotropy; D004121:Dimethyl Sulfoxide / Q000737:chemistry*; D008956:Models, Chemical; D012997:Solvents / Q000737:chemistry; D013059:Spectrum Analysis, Raman
chemical_list: D012997:Solvents; D004121:Dimethyl Sulfoxide