QENS Study of Diffusive and Localized Cation Motions of Pyridinium-based Ionic Liquids

被引：12

作者：

Embs, Jan Peter ^{[1
]}

Burankova, Tatsiana ^{[1
,2
]}

Reichert, Elena ^{[2
]}

Fossog, Verlaine ^{[2
]}

Hempelmann, Rolf ^{[2
]}

机构：

[1] Paul Scherrer Inst, Lab Neutron Scattering, CH-5232 Villigen, Switzerland

[2] Univ Saarland, D-66123 Saarbrucken, Germany

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2013年 / 82卷

关键词：

Quasielastic neutron scattering; ionic liquids; protonated/deuterated samples; jump-diffusion; Gaussian model for localized translational motion; alkyl chain length; DYNAMICS;

D O I：

10.7566/JPSJS.82SA.SA003

中图分类号：

O4 [物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

We have investigated stochastic motions of the cations of the pyridinium based ILs (1-butylpyridinium bis(trifluoromethylsulfonyl)imide [BuPy] [Tf2N], 1-dodecylpyridinium bis(trifluoromethylsulfonyl)imide [C12Py][Tf2N]) with different length of the alkyl substituent attached to the pyridinium ring. The accessible observation time at the instrument enabled us to consider the slower long-range motion and the faster localized one. Both of the processes are affected by the length of the alkyl chain. For better understanding of the localized process the QENS-spectra of partially deuterated samples have been analyzed as well.

引用

页数：6

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