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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Triggering the Chemical Instability of an Ionic Liquid under High Pressure

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Faria, Luiz F. O. ; Nobrega, Marcelo M. ; Temperini, Marcia L. A. ; Bini, Roberto ; Ribeiro, Mauro C. C.
Total Authors: 5
Document type: Journal article
Source: Journal of Physical Chemistry B; v. 120, n. 34, p. 9097-9102, SEP 1 2016.
Web of Science Citations: 3

Ionic liquids are an interesting class of materials due to their distinguished properties, allowing their use in an impressive range of applications,, from catalysis to hypergolic fuels. However, the reactivity triggered by the application of high pressure can give rise to a new class of materials, which is not achieved under normal conditions. Here, we report on the high-pressure chemical instability of the ionic liquid 1-allyl-3-methylimi dazolium dicyanamide, {[}allylC(1) im] {[}N(CN)(2)], probed by both Raman and IR techniques and supported by quantum chemical calculations. Our results show a reaction occurring above 8 GPa, involving the terminal double bond of the allyl group, giving rise to an oligomeric product. The results presented herein contribute to our understanding of the stability of ionic liquids, which is of paramount interest for engineering applications. Moreover, gaining insight into this peculiar kind of reactivity could lead to the development of new or alternative synthetic routes to achieve, for example, poly(ionic liquids). (AU)

FAPESP's process: 15/05803-0 - Ionic liquid structure under high pressure
Grantee:Luiz Felipe de Oliveira Faria
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 15/09763-2 - High pressure synthesis and reactivity of aniline and polyaniline-gold composites
Grantee:Marcelo Medre Nobrega
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 12/13119-3 - Vibrational spectroscopy in condensed phases
Grantee:Mauro Carlos Costa Ribeiro
Support type: Research Projects - Thematic Grants
FAPESP's process: 14/15107-8 - High pressure Raman spectroscopy, from aromatics amines to conducting polymers.
Grantee:Marcelo Medre Nobrega
Support type: Scholarships in Brazil - Post-Doctorate