Room-Temperature Thermotropic Ionic Liquid Crystals: Viologen Bis (Triflimide) Salts

P Bhowmik, H Han, I Nedeltchev…

Index: Bhowmik, Pradip K.; Han, Haesook; Nedeltchev, Ivan K.; Cebe, James J. Molecular Crystals and Liquid Crystals, 2004 , vol. 419, p. 27 - 46

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Citation Number: 35

Abstract

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 ...