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The wavelength dependence of the intensities of raman lines of halogenoethylenes

โœ Scribed by Y. Takagi; Y. Udagawa; N. Mikami; K. Kaya; M. Ito

Publisher
Elsevier Science
Year
1972
Tongue
English
Weight
332 KB
Volume
17
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

The &man spectra of tMns-dichloroethylene, trichloroethylene, tetrachloroethylene and tetrabromoethylene

were measured with several excitation ws.velen,tis ranging from 6328 to 337.1 nm. A marked increase of the relative intensity of the C-C stretching mode was observed for all the halogenoethylenes, and discussed with relation to the lower lying excited electronic state.

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## Abstract The laser excitation wavelength is an important parameter in obtaining definitive Raman spectra from pharmaceutical drug substances. This paper investigates the effect of changing wavelength on the Raman spectra of four different drug substances: paracetamol, paroxetine and ranitidine (