On the applicability of the rotational diffusion model in liquid crystalline solvents. A nuclear magnetic relaxation study of toluene

摘要: The model of rotational diffusion in the presence an orienting potential has been adapted to case asymmetric top molecule that is defined by two ordering parameters. It used describe relaxation quadrupolar mechanism deuterons toluene, dissolved «Phase V». No set constants could be found, which simultaneously reproduce all spectral densities were derived from measured rates. Only very approximate agreement obtained with sets are same order magnitude and about axis plane benzene ring perpendicular methylgroup, slower magnitude. anisotropy viscosity solution not explicitly taken into account, but it indicated how this might done. At stage, therefore, no definitive conclusions can drawn, clearly application liquid crystalline solutions should considered care