New Pyrazolium Salts as a Support for Ionic Liquid Crystals and Ionic Conductors.

ABSTRACT: Ionic liquid crystals (ILCs) are a class of materials that combine the properties of liquid crystals (LCs) and ionic liquids (ILs). This type of materials is directed towards properties such as conductivity in ordered systems at different temperatures. In this work, we synthesize five new families of ILCs containing symmetrical and unsymmetrical substituted pyrazolium cations, with different alkyl long-chains, and anions such as Cl-, BF₄-, ReO₄-, p-CH₃-₆H₄SO₃- (PTS) and CF₃SO₃- (OTf). We study their thermal behavior by polarized light optical microscopy (POM) and differential scanning calorimetry (DSC). All of them, except those with OTf as counteranion, show thermotropic mesomorphism. The observations by POM reveal textures of lamellar mesophases. Those agree with the arrangement observed

SUBMITTER: Pastor MJ 

PROVIDER: S-EPMC5951432 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature