Molecular dynamics depolarized light scattering

The (3-process provides a further puzzle There are almost no reports of its detection by depolarized light scattering, even though the latter is believed to probe the same molecular reorientation dynamics as DS. In part, this must be related to the fact that the relevant kilohertz-to-megahertz range is not easily accessible to LS. However, from the rare reports where LS and DS results of 13-processes are compared, it appears that (3-processes only weakly show up in LS, if at all [65,160,161]. As an example, Fig. 36 shows normalized correlation... 

B. J. Alder, H. L. Strauss, and J. J. Weis. Studies in molecular dynamics XII. Band shape of the depolarized light scattered from atomic fluids. J. Chem. Phys., JP 1002-1012 (1973). 

A. J. C. Ladd, T. A. Litovitz, and C. J. Montrose. Molecular dynamics studies of depolarized light scattering from argon at various fluid densities. J. Chem. Phys., 77 4242-4248 (1979). 

Data of Dr were obtained for low molecular weight poly (y-benzyl-L-gluta-mate) (PBLG) samples in isotropic solutions by two methods. Mori et al. [129] used dynamic electric birefringence, while Zero and Pecora [130] and Kubota and Chu [131] applied depolarized dynamic light scattering. Figure 18 shows... 

F. Barocchi, M. Zoppi, and M. Neumann. First-order quantum corrections to depolarized interaction induced light scattering spectral moments Molecular dynamics calculation. Phys. Rev. A, 27 1587-1593 (1983). 

Viscosity measurements of solutions of low-molecular weight PBO in chlorosulfonic acid and other solvents yielded a Mark-Houwink exponent of 1.85, which is very close to the value expected for a rodlike polymer [45]. Depolarized dynamic light scattering of PBT solutions in chlorosulfonic acid resulted in a persistence length of 64 nm, which is one of the highest persistence lengths known when compared with those of other rigid-rod polymers [58]. 

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