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Linear polarization Raman optical activity: a new form of natural optical activity

✍ Scribed by Lutz Hecht; Laurence A. Nafie


Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
666 KB
Volume
174
Category
Article
ISSN
0009-2614

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✦ Synopsis


A new form of natural optical activity is identified on the basis of a general theory of natural Raman optical activity (ROA). This novel ROA phenomenon is predicted to occur as the difference in Raman-scattered intensity for pairs of linearly polarized measurements and depends on the real part of the product of the transition-polarizability and optical-activity tensors. This is the tint form of ROA to be identified that does not directly involve the use or measurement of circularly polarized radiation.


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✍ Lutz Hecht; Laurence A. Nafie πŸ“‚ Article πŸ“… 1992 πŸ› Elsevier Science 🌐 English βš– 227 KB

Recently, we introduced linear polarization Raman optical activity (LP ROA) as a new form of natural optical activity (NAO) [ 1 ] for small chiral molecules under resonance scattering conditions randomly oriented in an optically isotropic phase (in the absence of any externally applied electromagnet

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✍ Laurence A. Nafie; Teresa B. Freedman πŸ“‚ Article πŸ“… 1989 πŸ› Elsevier Science 🌐 English βš– 476 KB

The theoretical description of dual circular polarization (DCP) Raman optical activity is presented. It is shown that for forward scattering, right-angle scattering and backward scattering, it is possible to measure a form of ROA in which both the incident and scattered circular polarizations are si

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The first measurements of scattered circular polarization (SCP) Raman optical activity (ROA) are reported in which the degree of circular polarization of the scattered light is determined. The SCP ROA spectra are relatively simple to measure and confirm theoretical predictions of their relation to i

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✍ Robert A. Harris; Wm.M. McClain πŸ“‚ Article πŸ“… 1992 πŸ› Elsevier Science 🌐 English βš– 292 KB

We show that the "... new form of natural optical activity" of Hecht and Nafie is a special case of scattering phenomena predicted by a very general theorem. In addition, the "...new form..." is closely related to its well known elastic cousin.

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✍ Gu-Sheng Yu; Laurence A. Nafie πŸ“‚ Article πŸ“… 1994 πŸ› Elsevier Science 🌐 English βš– 759 KB

We report the first isolation of preresonance Raman scattering behavior in Raman optical activity (ROA) and the first measurement of out-of-phase dual circular polarization (DCPu) ROA. Using a series of molecules of increasing delocalized electronic structure, we observe a correlated increase in the