Crystal structure of the ionic liquid EtNH3NO3—Insights into the thermal phase behavior of protic ionic liquids

Wesley A. Henderson; Paul Fylstra; Hugh C. De Long; Paul C. Trulove; Simon Parsons

doi:10.1039/C2CP43079G

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Crystal structure of the ionic liquid EtNH₃NO₃—Insights into the thermal phase behavior of protic ionic liquids†

Wesley A. Henderson,*^ab Paul Fylstra,^a Hugh C. De Long,^c Paul C. Trulove^a and Simon Parsons^d

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* Corresponding authors

^a Department of Chemistry, U.S. Naval Academy, Annapolis, USA
E-mail: trulove@usna.edu
Fax: +1-410-293-2218
Tel: +1-410-293-6622

^b Ionic Liquids & Electrolytes for Energy Technologies (ILEET) Laboratory, Department of Chemical & Biomolecular Engineering, NC State University, Raleigh, USA
E-mail: whender@ncsu.edu
Fax: +1-919-515-3465
Tel: +1-919-513-2917

^c U.S. Air Force Office of Scientific Research, Arlington, USA
E-mail: hugh.delong@afosr.af.mil
Fax: +1-703-696-7360
Tel: +1-703-696-7722

^d School of Chemistry, University of Edinburgh, Edinburgh, Scotland, UK
E-mail: s.parsons@ed.ac.uk
Fax: +44 (0)131 650 4743
Tel: +44 (0)131 650 5804

Abstract

The crystal structure of the salt ethylammonium nitrate (EtNH₃NO₃) has been determined. EtNH₃NO₃ is one of the most widely studied protic ionic liquids (PILs)—ILs formed by proton transfer from a Brønsted acid to a Brønsted base. The structural features from the crystal structure, in concert with a Raman spectroscopic analysis of the ions, provide direct insight as to why EtNH₃NO₃ melts below ambient temperature, while other related salts (such as EtNH₃Cl) do not.

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Article information

DOI: https://doi.org/10.1039/C2CP43079G
Article type: Paper
Submitted: 03 Sep 2012
Accepted: 15 Oct 2012
First published: 16 Oct 2012

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Phys. Chem. Chem. Phys., 2012,14, 16041-16046

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Crystal structure of the ionic liquid EtNH₃NO₃—Insights into the thermal phase behavior of protic ionic liquids

W. A. Henderson, P. Fylstra, H. C. De Long, P. C. Trulove and S. Parsons, Phys. Chem. Chem. Phys., 2012, 14, 16041 DOI: 10.1039/C2CP43079G

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