Four polypyridinium salts were synthesized from 4,4'-(1,4-phenylene)bis(2,6-diphenylpyrilium) tosylate and 3,3'-dimethylnaphthidine with tosylate, triflimide, 1-napthalenesulfonate, and 2-napthalenesulfonate counterions. Their structures and purities were established by FTIR, FTNMR spectroscopies, Gel Permeation Chromatography and Elemental Analyses. Thermo gravimetric and Differential Scanning Calorimetric studies show them having high thermal stabilities. Fluorescence spectroscopy results show that the nature of the counterions influence their thermotropic and light-emitting properties. Polarized light microscopy shows that they all form lyotropic liquid crystals at 24 oC which is not influenced by the counterions.

Thermotropic, light-emitting, and liquid crystalline properties of novel polypyridinium salts derived from 4,4'-(1,4-phenylene)bis(2,6-diphenylpyrilium)tosylate and 3,3'-dimethylnaphthidine

247th National Meeting (2014)

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