Dynamics of ferrocene in molecular sieves probed by Mossbauer spectroscopy and nuclear resonant scattering
| Autor: | U. van Bürck, P. Härter, Peter Behrens, Ilya Sergueev, T. Asthalter, J. Kornatowski, F. E. Wagner, Stefan Klingelhöfer |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
History
Photon Forward scatter Mossbauer spectroscopy Analytical chemistry Bulk melting temperatures Slow dynamics Synchrotron radiation Experimental data Radiation Opening angle Molecular sieve Perturbed angular correlation Iron compounds Molecular physics Fluorescence Molecular sieves Education Nuclear forward scattering Rotational dynamics chemistry.chemical_compound Mössbauer spectroscopy ddc:530 Theoretical models Anisotropy Konferenzschrift Molecular axis Photons Ssbauer spectroscopy Nuclear resonant scattering Sieves Forward scattering ddc Computer Science Applications Ferrocene chemistry Quantum theory Single crystals Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik Ferrocenes |
| Zdroj: | Journal of Physics: Conference Series 217 (2010), Nr. 1 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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