Complex Dynamics of Pyridinium Cation in Ferroelectric Bis(thiourea)pyridinium Iodide Studied by Quasi-Elastic Neutron Scattering

We have studied the dynamics of a bis(thiourea)pyridinium iodide inclusion compound by means of quasi-elastic neutron scattering (QENS). Our results reveal the complex dynamics of pyridinium cations confined in thiourea channels. Two types of pyridinium cation motions (in-plane and out-of-plane) wer...

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Bibliographic Details
Published inJournal of physical chemistry. C Vol. 115; no. 31; pp. 15164 - 15171
Main Authors Pajzderska, A, Gonzalez, M. A, Embs, J. P, Wa̧sicki, J
Format Journal Article
LanguageEnglish
Published American Chemical Society 11.08.2011
Subjects
C: Nanops and Nanostructures
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Summary:We have studied the dynamics of a bis(thiourea)pyridinium iodide inclusion compound by means of quasi-elastic neutron scattering (QENS). Our results reveal the complex dynamics of pyridinium cations confined in thiourea channels. Two types of pyridinium cation motions (in-plane and out-of-plane) were characterized in a wide temperature range using spectrometers with different energy resolutions. The QENS data allow description of the geometry of both motions and show that their corresponding correlation times differ more than 2 orders of magnitude at room temperature. The influence of the host thiourea matrix on pyridinium cation dynamics is discussed.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp201940e