NMR and Rheological Study of Anion Size Influence on the Properties of Two Imidazolium-based Ionic Liquids

Stephen M Green (1) , Michael E. Ries (1) , Jamie Moffat (2) , Tatiana Budtova (3)

1 SMP - Soft Matter Physics Research Group [Leeds]
2 Innovia Films
3 CEMEF - Centre de Mise en Forme des Matériaux

NMR self-diffusion and relaxation, coupled with viscosity, were used to study the properties and structure of two imidazolium-based ionic liquids, 1-ethyl-3-methylimidazolium acetate [C2MIM][OAc] and 1-ethyl-3-methylimidazolium octanoate [C2MIM][OOct]. The experimental results point to the formation of different types of aggregates in each ionic liquid. These aggregates are small and stable under flow and temperature in [C2MIM][OAc], whereas the aggregates are large and sensitive to flow and temperature in [C2MIM][OOct]. In the latter case the size of aggregates decreases both under flow and temperature increase.

Domaines: Chimie théorique et/ou physique; Matière Condensée [cond-mat]

Stephen M Green, Michael E. Ries, Jamie Moffat, Tatiana Budtova. NMR and Rheological Study of Anion Size Influence on the Properties of Two Imidazolium-based Ionic Liquids. Scientific Reports, 2017, 7, pp.8968. ⟨10.1038/s41598-017-09509-2⟩. ⟨hal-01647843⟩