Nine 1-allyl-3-alkylimidazolium ([ACnIm]) or 1-vinyl-3-alkylimidazolium ([VCnIm]) dicyanamides (DCA) were prepared and characterized, and their physicochemical properties were studied in detail. Except for [AVIm]DCA and [AC4Im]DCA, the other dicyanamides with hexyl or longer alkyl chains on the cation exhibited the characteristic of hydrophobicity. Among them, [AC8Im]DCA and [AC10Im]DCA were found to possess similar densities to water, i.e. 1.007 g cm−3 and 0.988 g cm−3 at 25 °C, respectively. Interestingly, a reversible phase reversion of a [AC8Im]DCA/H2O mixture was observed as the temperature varied. These environmentally-friendly liquid materials have potential applications as precursors for syntheses of conducting polymeric materials.
制备并表征了九种1-烯丙基-3-烷基
咪唑双
氰胺([ACnIm]DCA)或
1-乙烯基-3-烷基
咪唑双
氰胺([
VCnIm]DCA),并详细研究了它们的物理
化学性质。除了[AVIm]DCA和[AC4Im]DCA外,阳离子带有己基或更长烷基的其他双
氰胺表现出疏
水性特征。其中,[AC8Im]DCA和[AC10Im]DCA的密度与
水相似,分别为1.007 g cm−3和0.988 g cm−3(25°C)。有趣的是,随着温度的变化,观察到了[AC8Im]DCA/
H2O混合物的可逆相变。这些环境友好的液体材料有望作为导电高分子材料合成的前驱体。