Anisotropic Translational Diffusion of Methane and Chloroform in Thermotropic Nematic and Smectic Liquid Crystals

13C PGSE NMR Experiment with Heteronuclear Dipolar Decoupling to Measure Diffusion in Liquid Crystals and Solids

“…Hence, there is usually no sufficient time to apply long and strong enough gradient pulses and the extra dephasing induced by diffusion along the applied spatial gradient of magnetic field is negligible (7,8). (Important exceptions are some small, weakly ordered solutes, including water, whose weak dipole coupling allows conventional PGSE measurements (7)(8)(9). )…”

Orientation-Dependent Friction in Liquid Crystals

“…For lack of better knowledge, we have identified 7 7 : and 7 7 ; with the Helfrich viscosities q1 and q2 reported by Kneppe and Schneider" for MBBA and equated qR with 5jT in the Eqs. (21). This choice may be questionable, but it is useful to give upper limits to our correction factors.…”

Translational Diffusion of CH4 and CH2Cl2 Dissolved in Cholesteric Liquid Crystals

“…into a 3.4 mm inner diameter Pyrex glass sample tubes, as described in Ref. 1. The introduction of the probe molecules, particularly the methylene chloride, reduced both the clearing temperature and the transition temperature to the smectic phase.…”