A NEW CLASS OF IONIC SOLVENTS, ELECTROLYTES AND ENGINEERING FLUIDS BASED ON 1,3-ALKYLMETHYL-1,2,3-BENZOTRIAZOLIUM SALTS
ABSTRACT: A new series of
ionic liquids based on 1,3-alkylmethyl-1,2,3-benzotriazolium cation has been
prepared. The spectroscopic, physical and electrochemical characteristics of
this family of salts have been investigated with respect to potential usage as
ionic solvents, electrolytes and engineering fluids. Incorporation of diverse
anions including weak coordinating anion and pseudohalide with this
benzotriazolium cation produces ionic liquids with advantageously low melting
points and good thermal stability. Thermal analyses of these very stable salts
included the determination of melting points (-65 to 164oC) and
decomposition temperatures (up to 291oC). The electrochemical
windows of representative benzotriazolium species has been investigated by
cyclic voltammetry and determined to be ~ 3 V. The X-ray single crystal and
spectroscopic studies revealed that weak hydrogen-bonding interactions between
the benzotriazolium ring protons and the anions are present both in the solid
state as well as in solution.
Keywords: ionic liquids, X-ray
single crystal, thermal analysis, electrochemical analysis, benzotriazolium
salt
Author: Ahmad Mudzakir
Journal Code: jpkimiagg060018
