Abstract
The proton spin-lattice relaxation has been measured in cholesteryl stearate, oleate, and linoleate in the smectic and cholesteric mesophases and in the isotropic liquid using conventional pulsed proton magnetic resonance methods at 30 MHz. For all the esters, relaxation is found to be exponential in the smectic mesophase and nonexponential in the cholesteric mesophase and in the isotropic liquid. The nonexponential relaxation is analyzed assuming two exponentials. The results of this and other studies of relaxation in cholesteryl alkyl esters are compared.
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