Dynamics of ferrocene in molecular sieves probed by Mossbauer spectroscopy and nuclear resonant scattering

  • T. Asthalter
  • , I. Sergueev
  • , U. Van Bürck
  • , F. E. Wagner
  • , P. Härter
  • , J. Kornatowski
  • , S. Klingelhöfer
  • , P. Behrens

Research output: Contribution to journalConference articlepeer-review

Abstract

A detailed study on the slow dynamics of ferrocene in the unidimensional channels of the molecular sieves SSZ-24 and AlPO4-5 has been carried out, using Mössbauer spectroscopy (MS), nuclear forward scattering (NFS) and synchrotron radiation-based perturbed angular correlations (SRPAC). In both host systems, anisotropic rotational dynamics is observed above 100 K. For SSZ-24, this anisotropy persists even above the bulk melting temperature of ferrocene. Various theoretical models are exploited for the study of anisotropic discrete jump rotations for the first time. The experimental data can be described fairly well by a jump model that involves reorientations of the molecular axis on a cone mantle with an opening angle dependant on temperature.

Original languageEnglish
Article number012143
JournalJournal of Physics: Conference Series
Volume217
Issue number1
DOIs
StatePublished - 2010
EventInternational Conference on the Applications of the Mossbauer Effect, ICAME 2009 - Vienna, Austria
Duration: 19 Jul 200924 Jul 2009

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