In this presentation, we report the synthesis of Ionic perylenebis(dicarbixiimide)s with formate (1a  ) and trifluoroacetate (1b  ) counterions. The effect of these counterions on aggregation and liquid-crystalline properties of these compounds have been investigated using UV-vis spectroscopy, 2H-NMR spectroscopy and optical polarizing microscopy. Studies by 2H NMR spectroscopy and polarized optical microscopy showed that the change in counterions from formate to trifluoroacetate causes dramatic changes in the liquid-crystalline behavior of 1  . At a similar concentration, the phase transition temperatures and the order parameters of trifluoroacetate salt 1b  are lower than that of formate salt 1a .

Effect of counterions on phase transition properties and order of ionic perylenebis(dicarboxiimide)s

247th National Meeting (2014)

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