Circular intensity differential scattering

It is also interesting to note that circular differential Raman scattering, circular intensity differential (CID), has been reported for a series of optically active sulfoxides and a correlation found between the absolute configuration at sulfur and the differential scattering (240). Thus, all (/ )-alkyl p-tolyl sulfoxides investigated show a common (positive) CID feature in the 300 to 400 cm" region. 

Phenomena related to circular dichroism which may be useful for studying conformations in polymers are the circular intensity differential (CID) for scattered light. The difference in scattered intensity is measured for left and right circularly polarized incident light. At this time these effects have only been reported for small molecules. In principle, however, they may be very useful for the study of polymers. 

We have been discussing electronic transitions and ultraviolet or visible circular dichroism. However an optically active molecule will also have infrared CD due to its vibrational transitions. The measurement of infrared CD is very difficult, but some data exist [29]. Another related measurement is the Raman circular intensity differential [30]. It is the difference in Raman scattered intensity when right and left circularly polarized light is... 

Relevant quantities of interest, e.g. differential scattered intensities A/, are obtained from the formulae in Table 1 by an appropriate choice of K. The difference between the intensity of right (R) and left (L) circularly polarized scattered light in a backscat-tering SCP experiment with unpolarized (u) exciting light from Equation [8] is... 

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