ISSN:
0377-0486
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The Raman non-coincidence effect of the symmetric C=O stretching band was measured in liquid acetone and N,N-dimethylformamide confined to porous silica glasses prepared by the sol - gel process. The experiments were carried out both on bulk liquids and liquids confined to glasses with pore radii from 17 - 76 Å at 293 K. The value of the non-coincidence was decreased with decreasing pore radius (R) and scaled approximately as 1/R. Additional information about the role of pore surface effects was obtained by measurements on the polar liquids confined to surface-modified glasses when the surface hydroxyl groups were replaced by OSi(CH3)3 groups. The experimental data show that the non-coincidence effect is independent of the pore size in surface-modified glasses.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jrs.1250261107
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