Speaker
Description
Protic Ionic Liquids (PILs) are a class of tailorable solvents made up of fused salts with melting points below 100 °C, which are formed through a Brønsted acid-base reaction involving proton exchange[1]. These solvents have applications as lubricants, electrolytes, and many other uses[2]. Although they are quite similar to molten salts, their crystal structures have not been explored in-depth, with only ethylammonium nitrate (EAN) having a reported crystal structure[3, 4].
Ten alkylammonium-based protic ionic liquids at both neat (<1 wt% water) and 90 mol% PIL, 10 mol% water concentrations were selected. Diffraction patterns were collected at the Australian Synchrotron ANSTO while attempting to crystallise the samples by cooling to 120 K. Five samples crystallised (3 neat, 2 dilute), where the temperature of the system was then increased at a rate of 6 K/min to room temperature. From these patterns we have identified a number of crystal phases, identifying their stability ranges and lattice constant variation from 120 K to room temperature.
[1] Hallett, J.P. and Welton, T. (2011). Chemical Reviews. 111, 3508–3576.
[2] Greaves, T.L. and Drummond, C.J. (2008). Chemical Reviews. 108, 206–237.
[3] Abe, H. (2020). Journal of Molecular Liquids. 6.
[4] Henderson, W.A., et al. (2012). Physical Chemistry Chemical Physics. 14, 16041.
| Level of Expertise | Student |
|---|---|
| Presenter Gender | Man |
| Pronouns | He/Him |
| Which facility did you use for your research | Australian Synchrotron |
| Students Only - Are you interested in AINSE student funding | Yes |
| Do you wish to take part in the Student Poster Slam | No |
| Condition of submission | Yes |