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RESEARCH ARTICLE
Contents Vol 72(2)

Microheterogeneity in Ionic Liquid Mixtures: Hydrogen Bonding, Dispersed Ions, and Dispersed Ion Clusters

Andrea Mezzetta A , Maria J. Rodriguez Douton A , Lorenzo Guazzelli A , Christian Silvio Pomelli A and Cinzia Chiappe A B
+ Author Affiliations
- Author Affiliations

A Dipartimento di Farmacia, Università di Pisa, via Bonanno 33, 56126 Pisa, Italy.

B Corresponding author. Email: cinzia.chiappe@unipi.it

Australian Journal of Chemistry 72(2) 106-111 https://doi.org/10.1071/CH18375
Submitted: 31 July 2018  Accepted: 31 October 2018   Published: 23 November 2018

Abstract

Mixtures of ionic liquids (ILs) having a common ion but differing in the identity of the anion or cation represent highly interesting media. By varying the composition, one can successfully modulate specific physicochemical, structural, and biological properties. The molecular interactions (coulombic, hydrogen-bonding, van der Waals, and π–π intermolecular forces) that determine the three-dimensional structure of pure ILs can indeed be modified by the addition of another IL. In this context, we present here a 1H NMR, Fourier transform (FT)-IR, thermogravimetric, and solvatochromic study of the structural features of IL binary mixtures based on a common imidazolium cation ([CnC1im]+) and anions of different size and hydrogen-bond acceptor ability. For each mixture, the analyses were carried out at different molar ratios of the two components.


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