¹³C-NMR Studies on Fluctuation of Rod-Like Molecules in Solution: Molecular Dynamics in a Polar Solvent of CDCl₃

Abstract

To investigate the molecular dynamics of rod-like molecules in solution, 13 C-NMR measurements of a liquid crystalline material (4-(1-methylheptyloxycarbonyl)phenyl 4 0 -octyloxybiphenyl-4-carboxylate: MHPOBC) with a CDCl 3 solvent are carried out. When MHPOBC leaves the solution and deposits as crystals, peak broadening, which may result from a slowing down of molecular motion, occurs simultaneously. In addition, the correlation time s c of the corresponding molecular motion is estimated to be approximately 10 À8 s by the spin-lattice relaxation time T 1 measurements.

Phase Transformation of Swollen Thermotropic Liquid Crystals Studied by X-Ray and2H-NMR Measurements

“…Swollen thermotropic liquid crystals have been paid an increasing attention as a novel class of liquid-crystalline materials, because they give rise to new microscopic and macroscopic features by combining the thermotropic liquid crystalline structure with the lyotropic mesomorphic properties [1][2][3][4][5][6][7][8][9][10]. In this study, molecular realignments during successive phase transformations of a binary mixture of a smectogenic compound ((4-(1-methylheptyloxycarbonyl) phenyl 4 0 -octyloxybiphenyl-4-carboxylate: MHPOBC) and an aliphatic solvent (octane) are investigated.…”