Several dicationic salts with bis (triflimide) as counterions—otherwise known as viologens— were prepared by metathesis reaction of the corresponding viologen dibromides (diiodides) with lithium triflimide in a polar solvent. They were characterized for their thermotropic liquid- crystalline properties with various experimental techniques. Two of them had low crystal-to- smectic phase transitions (Tm) at–4 and 28° C; the other two also had low Tm values, at ...
