Nuclear magnetic resonance corresponding correlation time

Rotational diffusion is characterized by the mean square angular deviation during the time interval At (0 ) = GDrAi. Highly anisotropic motion, which is typical for lipid molecules in the membrane, is usually described by two rotational diffusion coefficients Dr and Dri, which correspond to diffusion about the long diffusion axis and perpendicular to it, respectively. The diffusion coefficients are related to corresponding rotational correlation times measured by nuclear magnetic resonance (NMR), electron spin resonance (ESR), fluorescent depolarization, and so on, as ... 

Summary Nuclear magnetic resonance (NMR) was used to determine the T2 NMR relaxation times of silicone oils. T2 characterizes the molecular mobility of fluids. The Ti times, furthermore, correlate with both the zero-shear-rate viscosity and the molecular weight of the corresponding silicone oil. Thus NMR provides the possibility of determining simultaneously the zero-shear-rate viscosity and the molecular weight of silicone oils by means of T2 experiments. 

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