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Title: Low-frequency Raman spectra and fragility of imidazolium ionic liquids

Raman spectra within the 5-200 cm{sup -1} range have been recorded as a function of temperature for different ionic liquids based on imidazolium cations. A correlation has been found between fragility and the temperature dependence of the strength of fast relaxational motions. Understanding quasielastic scattering as the relaxational contribution to ionic mean-squared displacement elucidates some effects on ionic liquids' fragility resulting from modifications in the chemical structure.
Authors:
 [1]
  1. Laboratorio de Espectroscopia Molecular, Instituto de Quimica, Universidade de Sao Paulo, CP 26077, CEP 05513-970 Sao Paulo, Sao Paulo (Brazil)
Publication Date:
OSTI Identifier:
21559881
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 133; Journal Issue: 2; Other Information: DOI: 10.1063/1.3462962; (c) 2010 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CATIONS; CORRELATIONS; MODIFICATIONS; MOLTEN SALTS; ORGANIC COMPOUNDS; QUASI-ELASTIC SCATTERING; RAMAN SPECTRA; TEMPERATURE DEPENDENCE CHARGED PARTICLES; DIRECT REACTIONS; IONS; NUCLEAR REACTIONS; QUASI-FREE REACTIONS; SALTS; SCATTERING; SPECTRA