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Takekiyo T, Yoshimura Y. Peculiar High-Pressure Phase Behavior of 1-Butyl-3-methylimidazolium Iodide. J Phys Chem B 2020; 124:7659-7667. [PMID: 32701280 DOI: 10.1021/acs.jpcb.0c04954] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We investigated the stability of the liquid phase of 1-butyl-3-methylimidazolium iodide (hereafter abbreviated as [C4mim][I]) up to 16.7 GPa at room temperature. We observed a peculiar phase transition behavior in the [C4mim][I] sample. In particular, a glassy state was formed at ∼1.3 GPa; however, the reddish-brown precipitate was formed probably due to concentrated I3- or I2- species that were formed above 12 GPa; [C4mim][I] showed a pressure-induced partial crystallization from the glassy state. We concluded that the conformation of [C4mim]+ is essential in iterative modulation to control the environmental formation of iodide precipitate.
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Affiliation(s)
- Takahiro Takekiyo
- Department of Applied Chemistry, National Defense Academy, 1-10-20, Hashirimizu, Yokosuka, Kanagawa 239-8686, Japan
| | - Yukihiro Yoshimura
- Department of Applied Chemistry, National Defense Academy, 1-10-20, Hashirimizu, Yokosuka, Kanagawa 239-8686, Japan
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2
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Faria LFO, Nobrega MM, Falsini N, Fanetti S, Temperini MLA, Bini R, Ribeiro MCC. Structure and Reactivity of the Ionic Liquid 1-Allyl-3-methylimidazolium Iodide under High Pressure. J Phys Chem B 2019; 123:1822-1830. [PMID: 30730744 DOI: 10.1021/acs.jpcb.8b10669] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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).
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Affiliation(s)
- Luiz F O Faria
- Laboratório de Espectroscopia Molecular, Departamento de Química Fundamental, Instituto de Química , Universidade de São Paulo , Av. Prof. Lineu Prestes 748 , 05508-000 São Paulo , Brazil
| | - Marcelo M Nobrega
- Laboratório de Espectroscopia Molecular, Departamento de Química Fundamental, Instituto de Química , Universidade de São Paulo , Av. Prof. Lineu Prestes 748 , 05508-000 São Paulo , Brazil.,LENS, European Laboratory for Nonlinear Spectroscopy , Via Nello Carrara 1 , 50019 Florence , Sesto Fiorentino, Italy
| | - Naomi Falsini
- LENS, European Laboratory for Nonlinear Spectroscopy , Via Nello Carrara 1 , 50019 Florence , Sesto Fiorentino, Italy
| | - Samuele Fanetti
- LENS, European Laboratory for Nonlinear Spectroscopy , Via Nello Carrara 1 , 50019 Florence , Sesto Fiorentino, Italy.,Dipartimento di Chimica"Ugo Schiff"dell'Università degli Studi di Firenze , Via della Lastruccia 3 , 50019 Florence , Sesto Fiorentino, Italy
| | - Marcia L A Temperini
- Laboratório de Espectroscopia Molecular, Departamento de Química Fundamental, Instituto de Química , Universidade de São Paulo , Av. Prof. Lineu Prestes 748 , 05508-000 São Paulo , Brazil
| | - Roberto Bini
- LENS, European Laboratory for Nonlinear Spectroscopy , Via Nello Carrara 1 , 50019 Florence , Sesto Fiorentino, Italy.,Dipartimento di Chimica"Ugo Schiff"dell'Università degli Studi di Firenze , Via della Lastruccia 3 , 50019 Florence , Sesto Fiorentino, Italy
| | - Mauro C C Ribeiro
- Laboratório de Espectroscopia Molecular, Departamento de Química Fundamental, Instituto de Química , Universidade de São Paulo , Av. Prof. Lineu Prestes 748 , 05508-000 São Paulo , Brazil
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Faria LFO, Lima TA, Ferreira FF, Ribeiro MCC. Ultraslow Phase Transitions in an Anion–Anion Hydrogen-Bonded Ionic Liquid. J Phys Chem B 2018; 122:1972-1980. [DOI: 10.1021/acs.jpcb.7b09497] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Luiz F. O. Faria
- Laboratório
de Espectroscopia Molecular, Departamento de Química Fundamental,
Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil
| | - Thamires A. Lima
- Laboratório
de Espectroscopia Molecular, Departamento de Química Fundamental,
Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil
| | - Fabio F. Ferreira
- Centro
de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André 09210-580, SP, Brazil
| | - Mauro C. C. Ribeiro
- Laboratório
de Espectroscopia Molecular, Departamento de Química Fundamental,
Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, São Paulo 05508-000, Brazil
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Takekiyo T, Koyama Y, Shigemi M, Matsuishi K, Abe H, Hamaya N, Yoshimura Y. Conformational adjustment for high-pressure glass formation of 1-alkyl-3-methylimidazolium tetrafluoroborate. Phys Chem Chem Phys 2017; 19:863-870. [DOI: 10.1039/c6cp06212a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The role of the alkyl-chain length (the conformational adjustment effect) in high pressure glass formation of 1-alkyl-3-methylimidazolum tetrafluoroborate.
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Affiliation(s)
- Takahiro Takekiyo
- Department of Applied Chemistry
- National Defense Academy
- Yokosuka
- Japan
| | - Yoshihiro Koyama
- Graduate School of Pure and Applied Science
- University of Tsukuba
- Tsukuba
- Japan
| | - Machiko Shigemi
- Department of Applied Chemistry
- National Defense Academy
- Yokosuka
- Japan
| | - Kiyoto Matsuishi
- Graduate School of Pure and Applied Science
- University of Tsukuba
- Tsukuba
- Japan
| | - Hiroshi Abe
- Department of Materials Science and Technology
- National Defense Academy
- Yokosuka
- Japan
| | - Nozomu Hamaya
- Graduate School of Humanities and Sciences
- Ochanomizu University
- Bunkyo-ku
- Japan
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