The determination of all six spectral densities of motion for partially oriented DICHLOROMETHANE-D2 (cas 1665-00-5)

Add time:09/08/2019    Source:sciencedirect.com

Measurements of spin-lattice relaxation, combined with 2D measurements of single- and double-quantum spin-echo decay rates, have been used to determine the complete set of spectral density parameters which characterize deuterium relaxation of CD2Cl2 partially oriented in a nematic liquid crystal (Merck Licristal Phase V). At 31.5°C and 9.2 MHz, terms describing cross-correlation between two deuterium quadrupole coupling tensors are found to be comparable to the autocorrelation terms. A partial interpretation of these results in terms of anisotropic molecular reorientation and order-director fluctuations is presented and is confirmed by additional measurements of the temperature and field dependence of spin-lattice relaxation rates.

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