| Full text | |
| Author(s): |
Lima, Thamires A.
[1, 2]
;
Li, Zhixia
[1, 3]
;
Tyagi, Madhusudan
[4, 5]
;
Ribeiro, Mauro C. C.
[2]
;
Z, Y.
[1, 3, 6, 7]
Total Authors: 5
|
| Affiliation: | [1] Univ Illinois, Beckman Inst Adv Sci & Technol, Urbana, IL 61801 - USA
[2] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Lab Espect Mol, BR-05513970 Sao Paulo, SP - Brazil
[3] Univ Illinois, Dept Nucl Plasma & Radiol Engn, Urbana, IL 61801 - USA
[4] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 - USA
[5] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 - USA
[6] Univ Illinois, Dept Elect & Comp Engn, Urbana, IL 61801 - USA
[7] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 - USA
Total Affiliations: 7
|
| Document type: | Journal article |
| Source: | Journal of Chemical Physics; v. 150, n. 14 APR 14 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
The competition between Coulomb and van der Waals interactions brings forth unique dynamic features and broad applications to ionic liquids. Herein, we present a combined calorimetric, X-ray diffraction, incoherent elastic, and quasi-elastic neutron scattering study, over a wide temperature range (180-340 K), of the relaxational dynamics of the liquid, supercooled liquid, crystalline, glassy, and glacial states of two model ionic liquids: tributylmethylammonium (a good glass-former) and butyltrimethylammonium (a good crystal-former) cations and the bis(trifluoromethanesulfonyl) imide anion. In both systems, we observed two distinct relaxation processes. The Q-dependence of the respective relaxation time shows that the alpha-process is diffusive, while the beta-process is modulated by the structure of the liquids. (AU) | |
| FAPESP's process: | 16/24241-5 - Studying the dynamics of glass forming ionic liquids by neutron and X-ray scattering |
| Grantee: | Thamires Andrade Lima |
| 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 |