M. Matsui et al., FLUORINE-CONTAINING BENZOTHIAZOLYL BISAZO DYES - THEIR APPLICATION TOGUEST-HOST LIQUID-CRYSTAL DISPLAYS, Liquid crystals, 25(2), 1998, pp. 235-240
Perfluoroalkyl-substituted benzothiazolyl bisazo dyes showed higher so
lubility and greater bathochromicity than the corresponding alkyl deri
vatives. These dyes showed good dichroism (order parameter S > 0.75).