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

被引：0
|
作者：
Asthalter, T. [1 ]
Sergueev, I. [2 ]
van Buerck, U. [4 ]
Wagner, F. E. [4 ]
Haerter, P. [3 ]
Kornatowski, J. [5 ]
Klingelhoefer, S. [6 ]
Behrens, P. [6 ]
机构：
[1] Univ Stuttgart, Inst Phys Chem, D-70569 Stuttgart, Germany
[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[3] Tech Univ Munich, Anorgan Chem, D-85747 Garching, Germany
[4] Tech Univ Munich, Experimentalphys E13, D-85747 Garching, Germany
[5] Max Planck Inst Kohlenforsch, D-45470 Mulheim, Germany
[6] Leibniz Univ Hannover, Anorgan Chem, D-30167 Hannover, Germany
来源：
INTERNATIONAL CONFERENCE ON THE APPLICATIONS OF THE MOSSBAUER EFFECT (ICAME 2009) | 2010年 / 217卷
关键词：
STOCHASTIC THEORY; LINE-SHAPE; SPECTRA; MODEL;
D O I：
10.1088/1742-6596/217/1/012143
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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 Mossbauer spectroscopy (MS), nuclear forward scattering (NFS) and synchrotron radiation-based perturbed angular correlations (SRPAC). In both host systems, anisotropic rotational dynamics is observed above 100K. 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.
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页数：8
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