New aspects on polarity of 1-alkyl-3-methylimidazolium salts as measured by solvatochromic probes
Abstract
Kamlet–Taft solvatochromic polarity parameters β and π* of ionic liquids with 1-alkyl-3-methylimidazolium cations are determined in two ways by the counter anion X−: the β value represents the hydrogen bond basicity and the π* value depends on the polarizability of X−.