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A study of out-of-plane cation dynamics in a bis-thiourea pyridinium chloride inclusion compound

Physical Chemistry Chemical Physics, ISSN: 1463-9076, Vol: 13, Issue: 19, Page: 8908-8914
2011
  • 9
    Citations
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    Usage
  • 13
    Captures
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    9
    • Citation Indexes
      9
  • Captures
    13

Article Description

The out-of-plane motion of the pyridinium cation in the bis-thiourea pyridinium chloride inclusion compound has been studied in a wide temperature range using H NMR, dielectric spectroscopy and quasielastic neutron scattering. The geometry of this motion is obtained from the Q-dependence of the elastic incoherent structure factor determined from the quasielastic neutron scattering measurements. We find that the pyridinium cation performs out-of-plane reorientations around the axis passing through two opposite atoms of the ring. The correlation times as a function of temperature were measured in the three known crystallographic phases, finding a good agreement between the three techniques employed. The activation energy for this motion changes from 5 ± 1 kJ mol in the low-temperature phase to 1.2 ± 0.2 kJ mol in the intermediate and high-temperature phases. © 2011 the Owner Societies.

Bibliographic Details

Peplinska, B.; Krawczyk, J.; Pajzderska, A.; Embs, J. P.; Juranyi, F.; Gonzalez, M. A.; Czarnecki, P.; Wasicki, J.

Royal Society of Chemistry (RSC)

Physics and Astronomy; Chemistry

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