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Effects of hydrogen bonding on the Raman intensities of methanol, ethanol and water

✍ Scribed by Naomichi Abe; Mitsuo Ito

Publisher: John Wiley and Sons
Year: 1978
Tongue: English
Weight: 658 KB
Volume: 7
Category: Article
ISSN: 0377-0486
DOI: 10.1002/jrs.1250070311

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✦ Synopsis

Abstract

The absolute Raman intensities of methanol, ethanol and water in the gas and liquid phases have been measured using 514.5 and 337.1 nm excitation. Large intensity changes were observed for the Raman lines of the OH stretching vibrations in changing from gas to liquid. The observed intensity changes are interpreted as due to the additional contribution of the charge transfer electronic excited state arising from hydrogen bond formation. The Raman intensities of methanol, ethanol and water in alkali halide solutions were also studied. The observed effects of halide ions on the intensities and their excitation wavelength dependences were found to be well correlated with the known charge transfer states resulting from electron transfer from the halide ion to the surrounding solvent molecules.

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