ISSN:
0377-0486
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The spinning divided Raman liquid cell has been used to measure the relative integrated Raman intensities of several bands of C6H6(I), CCI4(I), C6H12(I), C6D6(I), CH3CN(I), CH2CI2(I), SO42-(aq.), and CIO4 -(aq.) at room temperature. To convert these relative intensities to absolute scattering activities, the average of the eight literature values of the absolute Raman scattering cross-section of the 992 cm-1 band of C6H6(I) under blue or green excitation was used. This yielded an unpolarized scattering activity per molecule of 640 ×10-9 cm4 g-1, with a standard deviation of 80 ×10-9 cm4 g-1 [in SI units, 792 ×10-34 and standard deviation 100 ×10-34 (C m2/V)2/(m2 kg)]. It is suggested that this value can be used as the basis for an interim scale of Raman scattering intensities. The scattering activities on this scale are higher than those in the literature because the benzene calibration value is higher than has been used previously. The relative scattering activities obtained agree well with those of Nestor and Lippincott. It is suggested that fairly weak and depolarized bands are often better secondary standards for relative intensity measurements than the very strong, very polarized bands that have traditionally been used.
Additional Material:
2 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jrs.1250190109
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