Deuteron and proton NMR study of D-2, p-dichlorobenzene and 1,3,5-trichlorobenzene in bimesogenic liquid crystals with two nematic phases

作者：Burnell E E^*; Ahmed Z; Welch C; Mehl G H; Dong R Y

来源：Chemical Physics Letters, 2016, 659: 48-54.

DOI：10.1016/j.cplett.2016.07.005

The solutes dideuterium, 1,3,5-trichlorobenzene and p-dichlorobenzene (pdcb) are co-dissolved in a 61/39 wt% mixture of CBC9CB/5CB, a bimesogenic liquid crystal with two nematic phases. NMR spectra are collected for each solute. The local electric field gradient (F-ZZ) is obtained from the dideuterium spectrum. A double Maier-Saupe potential (MSMS) is used to rationalize the order parameters of pdcb. The liquid-crystal fields G(1) and G(2) are taken to be due to size and shape interactions and interactions between the solute molecular quadrupole and the mean F-ZZ of the medium. The F-ZZ's obtained from D-2 and G(2) (from pdcb) are compared and discussed.

• 出版日期2016-8-16