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Structure and Reactivity of the Ionic Liquid 1-Allyl-3-methylimidazolium Iodide Under High Pressure

Structure and Reactivity of the Ionic Liquid 1-Allyl-3-methylimidazolium Iodide Under High Pressure

Luiz F O Faria, Marcelo M Nobrega, Naomi Falsini, Samuele Fanetti, Marcia L A Temperini, Roberto Bini, Mauro C C Ribeiro

J Phys Chem B. 2019 Feb 28;123(8):1822-1830.

PMID: 30730744

Abstract:

Poly(ionic liquid)s are an interesting class of compounds because of their unique chemical and physical properties gathering the characteristics of ionic liquids and polymers. Pressure and temperature have been demonstrated to be alternative parameters to obtain polymers from monomeric species using only physical tools. In this work, we investigate the reaction under high pressure and room temperature of the ionic liquid 1-allyl-3-methylimidazolium iodide by using the diamond anvil cell technique in combination with synchrotron X-ray diffraction and electronic and vibrational spectroscopies. The results indicate a chemical reaction happening through the terminal double bond of the allyl group both in crystalline and glassy phases with the onset of the reaction around ∼7 GPa. Vibrational spectra present evidence for an oligomerization reaction in both the phases. The reaction occurring both in glassy and crystal phases indicates a mechanism not driven by collective motions and likely related to local topological arrangements. The results presented herein extend our understanding of ionic liquid instability boundaries under high pressure and contribute to the development of alternative synthetic routes to achieve poly(ionic liquids).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP65039078	1-Allyl-3-methylimidazolium iodide		65039-07-8	Price

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