Ionic Liquids: Syntheses, Characterization And Applications In Analytical Chemistry

Abstract

Multifunctional ionic liquids (esp. dicationic and dianionic) have been shown to have a greater range of physical properties than most traditional, singly charged ILs. In this work, 28 novel tricationic ILs with specific structural variations have been synthesized in order to investigate the effect on their physicochemical properties. It was observed that the physicochemical properties can be varied to a greater extent in tricationic ILs than in traditional ILs. The central core of the tricationic IL itself can have different degrees of flexibility and these moieties can be altered as can the charge carrying groups to produce ILs with the desired physicochemical properties. These ILs have a greater range of viscosities and higher thermal stabilities than typical imidazolium based singly charged ionic liquids. Anion effects are also prominent with these highly tunable ionic liquids.