Dynamics of RTILs: A comparative dielectric and OKE study
Dynamics of RTILs: A comparative dielectric and OKE study
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RTIL 的动力学:介电常数和 OKE 的比较研究
DOI:
10.1016/j.molliq.2013.09.019
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发表时间:
2014
影响因子:
6
通讯作者:
Sonnleitner T
中科院分区:
文献类型:
--
作者:
Sonnleitner T
The dynamics of room-temperature ionic liquids (RTILs) were studied by investigating their dielectric relaxation (DR) and time-resolved optical Kerr-effect (OKE) spectra in the frequency range of ~ 10 MHz to ~ 20 THz. For the studied RTILs the OKE and DR spectra are dominated by a relaxation in the GHz region and extend to a relatively sharp band at around 10 THz. Whilst the first feature is mainly associated with the structural relaxation of the fluid through ion rotation (α relaxation), the second indicates the short-time limit of intermolecular dynamics. The rather featureless intermediate region is mainly associated with intermolecular vibrations that are strongly coupled to hindered rotations. In contrast to other RTILs, imidazolium salts show an additionalsub-α relaxation which dominates the OKE signal and is indicative of the breathing motion of rather long-lived cages.Mixed with polar solvents RTILs were found to retain their ionic liquid-like character up to relatively high levels of dilution, but with the overall dynamics considerably speeded up. Below RTIL mole fractions of ~ 0.2–0.4 these systems behave like conventional electrolyte solutions with more or less pronounced ion pairing.
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DOI:
--
发表时间:
2010
期刊:
OPTO
影响因子:
--
作者:
D. Turton;J. Hunger;A. Stoppa;G. Hefter;A. Thoman;M. Walther;R. Buchner;K. Wynne
通讯作者:
K. Wynne
DOI:
10.1063/1.2897432
发表时间:
2008
期刊:
The Journal of chemical physics
影响因子:
--
作者:
Turton DA
通讯作者:
Turton DA
影响因子:
15
作者:
Turton, David A.;Hunger, Johannes;Wynne, Klaas
通讯作者:
Wynne, Klaas
DOI:
10.1039/b816106b
发表时间:
2009
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
作者:
J. Sangoro;C. Iacob;A. Serghei;Christian Friedrich;Friedrich Kremer
通讯作者:
Friedrich Kremer
影响因子:
3.4
作者:
D. Turton;Thomas Sonnleitner;A. Ortner;M. Walther;G. Hefter;K. R. Seddon;S. Stana;N. Plechkova;R. Buchner;K. Wynne
通讯作者:
D. Turton;Thomas Sonnleitner;A. Ortner;M. Walther;G. Hefter;K. R. Seddon;S. Stana;N. Plechkova;R. Buchner;K. Wynne