Ms. Ho et al., NITROPHENYL LIQUID-CRYSTALS WITH INTRAMOLECULAR HYDROGEN-BONDING IN THE MESOGENIC CORE, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 225, 1993, pp. 383-389
A liquid crystalline homologous series of 4-nitrophenyl-4'-alkoxypheny
l diazene and their 2'-hydroxy analogs were synthesized, and their mes
ogenic properties were studied. The formation of intramolecular hydrog
en bonding in the 2'-hydroxy analog series increased the rigidity of t
he mesogenic core and enhances the ranges of the liquid crystalline ph
ases.