Issue 35, 2020

Ionic liquids of superior thermal stability. Validation of PPh4+ as an organic cation of impressive thermodynamic durability

Abstract

Recent work by Wasserscheid, et al. suggests that PPh4+ is an organic molecular ion of truly exceptional thermal stability. Herein we provide data that cements that conclusion: specifically, we show that aliphatic moieties of modified PPh4+-based cations incorporating methyl, methylene, or methine C–H bonds burn away at high temperatures in the presence of oxygen, forming CO, CO2, and water, leaving behind the parent ion PPh4+. The latter then undergoes no further reaction, at least below 425 °C.

Graphical abstract: Ionic liquids of superior thermal stability. Validation of PPh4+ as an organic cation of impressive thermodynamic durability

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Article information

Article type
Paper
Submitted
13 Apr 2020
Accepted
21 May 2020
First published
29 May 2020
This article is Open Access
Creative Commons BY license

RSC Adv., 2020,10, 20521-20528

Ionic liquids of superior thermal stability. Validation of PPh4+ as an organic cation of impressive thermodynamic durability

M. Soltani, J. L. McGeehee, A. C. Stenson, R. A. O'Brien, E. R. Duranty, E. A. Salter, A. Wierzbicki, T. G. Glover and J. H. Davis, RSC Adv., 2020, 10, 20521 DOI: 10.1039/D0RA03220D

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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