Item – Theses Canada

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OCLC number
1007024707
Link(s) to full text
LAC copy
LAC copy
Author
Mitambo, Munyao Musilli,1964-
Title
Probing solute-solvent interactions in ethyl 4-(dimethylamino)benzoate with Raman spectroscopy.
Degree
M. Sc. -- University of Alberta, 2000
Publisher
Ottawa : National Library of Canada = Bibliothèque nationale du Canada, [2002]
Description
2 microfiches
Notes
Includes bibliographical references.
Abstract
A novel 4 NMR-tube holder is described for quantitative Raman and resonance Raman spectroscopy. The relative Raman intensities of a 1:1 mixture of benzene and chloroform taken in a single holder were within 6% of those of the pure solvents taken with the 4 NMR-tube holder. The resonance Raman cross-section of chromate was determined within 6% of that obtained from a single-tube holder. Raman spectra of ethyl 4-(dimethylamino)benzoate (DMABEE) were recorded in solvents of varying polarity and hydrogen bonding strength to elucidate the molecular mechanism of solute-solvent interactions in the condensed phase. Frequency shifts were observed in the vibrational frequencies of the C=O stretching, the C-O stretching and the OCO bending modes, as a function of increasing solvent acceptor number. A molecular model of DMABEE-solvent interaction is proposed based on solute-solvent hydrogen bonding and [pi]-[pi] interactions. These results suggest that vibrational spectroscopy provides a mode-specific measure of solute-solvent interactions.
ISBN
0612598519
9780612598515