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

Author(s)

Faria, Luiz F. O. ^[1] ; Nobrega, Marcelo M. ^{[1, 2]} ; Falsini, Naomi ^[2] ; Fanetti, Samuele ^{[2, 3]} ; Temperini, Marcia L. A. ^[1] ; Bini, Roberto ^{[2, 3]} ; Ribeiro, Mauro C. C. ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Lab Espectroscopia Mol, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo - Brazil

^[2] LENS, European Lab Nonlinear Spect, Via Nello Carrara 1, I-50019 Florence, Sesto Fiorentin - Italy

^[3] Univ Firenze, Dipartimento Chim Ugo Schiff, Via Lastruccia 3, I-50019 Florence, Sesto Fiorentin - Italy

• Document type: Journal article
• Source: Journal of Physical Chemistry B; v. 123, n. 8, p. 1822-1830, FEB 28 2019.
• Web of Science Citations: 0

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 ally] group both in crystalline and glassy phases with the onset of the reaction around similar to 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). (AU)

• FAPESP's process: 16/21070-5 - Vibrational spectroscopy with spatial resolution
• Grantee: Mauro Carlos Costa Ribeiro
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 15/09763-2 - High pressure synthesis and reactivity of aniline and polyaniline-gold composites
• Grantee: Marcelo Medre Nobrega
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 12/13119-3 - Vibrational spectroscopy in condensed phases
• Grantee: Mauro Carlos Costa Ribeiro
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 15/05803-0 - Ionic liquid structure under high pressure
• Grantee: Luiz Felipe de Oliveira Faria
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 14/15107-8 - High pressure Raman spectroscopy, from aromatics amines to conducting polymers.
• Grantee: Marcelo Medre Nobrega
• Support Opportunities: Scholarships in Brazil - Post-Doctoral