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Studying the dynamics of glass forming ionic liquids by neutron and X-ray scattering

Grant number: 16/24241-5
Support type:Scholarships abroad - Research Internship - Post-doctor
Effective date (Start): April 01, 2017
Effective date (End): March 31, 2018
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal Investigator:Mauro Carlos Costa Ribeiro
Grantee:Thamires Andrade Lima
Supervisor abroad: Yang Zhang
Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Local de pesquisa : University of Illinois at Urbana-Champaign, United States  
Associated to the scholarship:14/15049-8 - A Raman spectroscopy study of the glass transition of ionic liquids under high pressure., BP.PD


The investigation of the collective dynamics in disordered systems is a very active research field since the beginning of modern science. Some ionic liquids are good glass formers and excellent model systems for studying complex dynamics. We have investigated the phase behavior and structure of these ionic liquids by differential scanning calorimetry, Raman spectroscopy, and X-ray diffraction techniques at low temperatures and high pressures. However, we have obtained only indirect dynamical information about these disordered systems by low-frequency Raman spectroscopy. In this project, we propose the direct dynamical study of glass forming [NTf2]based ionic liquids at different phases at low temperatures (100K - 300K) and high pressures (1 - 7000 bar) by Quasi-elastic Neutron Scattering, Inelastic Neutron Scattering, and Inelastic X-Ray Scattering techniques, aiming to understand the relation between the dynamical processes and the low temperature phase transitions.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
LIMA, THAMIRES A.; PASCHOAL, VITOR H.; FREITAS, RAFAEL S.; FARIA, LUIZ F. O.; LI, ZHIXIA; TYAGI, MADHUSUDAN; RIBEIRO, MAURO C. C. An inelastic neutron scattering, Raman, far-infrared, and molecular dynamics study of the intermolecular dynamics of two ionic liquids. Physical Chemistry Chemical Physics, v. 22, n. 16, p. 9074-9085, APR 28 2020. Web of Science Citations: 0.
LIMA, THAMIRES A.; LI, ZHIXIA; TYAGI, MADHUSUDAN; RIBEIRO, MAURO C. C.; Z, Y. Spatial and thermal signatures of alpha and beta relaxations in glassy and glacial aliphatic ionic liquids. Journal of Chemical Physics, v. 150, n. 14 APR 14 2019. Web of Science Citations: 0.

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