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N. M. Kuz'menok¹, S. G. Mikhalyonok¹, А. S. Arol¹, M. O. Shevchuk¹, V. S. Bezborodov^1,@, M. N. Krakhalev^2,3, V. S. Sutormin^2,3, O. O. Prishchepa^2,3, G. M. Zharkova⁴, V. Ya. Zyryanov²

Author affiliations
¹Belarusian State Technological University,
13-a Sverdlova St., Minsk, 220006, Belarus
E-mail: v_bezborodov@yahoo.com
²Kirensky Institute of Physics, Federal Research Center KSC SB RAS,
50 Akademgorodok, Krasnoyarsk, 660036, Russia
²Siberian Federal University, 79 Svobodny Ave., Krasnoyarsk, 660041, Russia
⁴Khristianovich Institute of Theoretical and Applied Mechanics, SB RAS,
4/1 Institutskaya St., Novosibirsk, 630090, Russia

Abstract
Quaternary ammonium salts and organotriphenylphosphonium halides have been synthesized. Their ions can have an orienting effect on liquid crystals. The solubility of the obtained compounds in the nematic liquid crystal – 4-cyano-4'-pentylbiphenyl (5CB) has been studied. It was shown that two ammonium salts both dissolve in the nematic and also dissociate into ions. At that, the anions moving in electric field can modify the boundary conditions. This fact allows using these compounds for the ion-surfactant method of controlling liquid crystal materials.

Keywords: liquid crystal, nematic, surfactant, quaternary ammonium salt, organotriphenylphosphonium halides, ionic-surfactant method