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

Communication: Glass transition and melting lines of an ionic liquid

Full text
Lima, Thamires A. [1] ; Faria, Luiz F. O. [1] ; Paschoal, Vitor H. [1] ; Ribeiro, Mauro C. C. [1]
Total Authors: 4
[1] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Lab Espect Mol, Av Prof Lineu Prestes 748, BR-05508000 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of Chemical Physics; v. 148, n. 17 MAY 7 2018.
Web of Science Citations: 5

The phase diagram of the ionic liquid 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesufonyl) imide, {[}Pyrr(1,4)]{[}NTf2], was explored by synchroton X-ray diffraction and Raman scattering measurements as a function of temperature and pressure. Glass transition T-g(p) and melting T-m(p) temperatures were obtained from atmospheric pressure up to ca. 2.0 GPa. We found that both the T-g(p) and T-m(p) curves follow essentially the same pressure dependence. The similarity of pressure coefficients, dT(g)/dp approximate to dT(m)/dp, is explained within the non-equilibrium thermodynamics approach for the glass transition by assuming that one of the Ehrenfest equations is appropriated for T-g(p), whereas T-m(p) follows the Clausius-Clapeyron equation valid for the first-order transitions. The results highlight that ionic liquids are excellent model systems to address fundamental questions related to the glass transition. Published by AIP Publishing. (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: 12/13119-3 - Vibrational spectroscopy in condensed phases
Grantee:Mauro Carlos Costa Ribeiro
Support type: Research Projects - Thematic Grants
FAPESP's process: 15/07516-8 - Collective dynamics of ionic liquids
Grantee:Vitor Hugo Paschoal
Support type: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 14/15049-8 - A Raman spectroscopy study of the glass transition of ionic liquids under high pressure.
Grantee:Thamires Andrade Lima
Support type: Scholarships in Brazil - Post-Doctorate