Raman frequency noncoincidence effect of confined liquid dimethyl sulfoxide
| Autor: | Jiri Jonas, Claus Czeslik, Yoo Joong Kim |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Formamide
Dimethyl sulfoxide Physics::Medical Physics Isotropy Analytical chemistry General Physics and Astronomy Radius Condensed Matter::Soft Condensed Matter chemistry.chemical_compound symbols.namesake chemistry Ab initio quantum chemistry methods symbols Physical and Theoretical Chemistry Anisotropy Porosity Raman spectroscopy |
| Zdroj: | The Journal of Chemical Physics. 111:9739-9742 |
| ISSN: | 1089-7690 0021-9606 |
| Popis: | Raman spectroscopy was used to study the short-range structure of liquid dimethyl sulfoxide (DMSO) confined to porous silica glasses in the pore radius range from 15 to 56 A. By analyzing isotropic and anisotropic Raman spectra of DMSO in the SO stretching vibration region, we found the noncoincidence of the in-phase and out-of-phase SO vibrational wavenumbers increasing with decreasing pore radius. This behavior is in contrast to that found earlier for other confined polar liquids. Using a theory derived by Logan and results of ab initio calculations, the liquid structures of DMSO, acetone, N,N-dimethyl formamide in the proximity of silica surfaces are proposed. |
| Databáze: | OpenAIRE |
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