Issue 7, 2008

Stability of [MeBu3N][Tf2N] under gamma irradiation

Abstract

The stability of the ionic liquid [MeBu3N][Tf2N], dry or after contact with water (where [MeBu3N]+ is the methyltributylammonium cation and [Tf2N] is the bistriflimide anion), was studied under 137Cs gamma irradiation in argon and in air. In a quantitative study with an absorbed dose of 2 MGy this ionic liquid was highly stable regardless of the radiolysis conditions. The radiolytic disappearance yields determined by ESI-MS were −0.38 and −0.25 µmol J−1 for the cation and anion, respectively. ESI-MS, NMR, and liquid chromatography coupled with ESI-MS identified a large number of degradation products in very small quantities for the same dose. The cation radicals were formed by the loss of a Bu˙ group, the Me˙ group, or two H˙ atoms to form a double bond with the butyl chain. Radiolysis of the anion produced mainly F˙ and CF3˙ radicals. The anion radicals recombined with the cation to form a wide range of secondary degradation products regardless of the radiolysis conditions.

Graphical abstract: Stability of [MeBu3N][Tf2N] under gamma irradiation

Supplementary files

Article information

Article type
Paper
Submitted
05 Sep 2007
Accepted
09 Nov 2007
First published
14 Dec 2007

Dalton Trans., 2008, 924-931

Stability of [MeBu3N][Tf2N] under gamma irradiation

É. Bossé, L. Berthon, N. Zorz, J. Monget, C. Berthon, I. Bisel, S. Legand and P. Moisy, Dalton Trans., 2008, 924 DOI: 10.1039/B713661G

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