Palmer, Benjamin A., Edwards-Gau, Gregory R., Morte Rodenas, Anabel, Kariuki, Benson ![]() ![]() |
Abstract
While the phenomenon of birefringence is well-established in the case of visible radiation and is exploited in many fields (e.g., through the use of the polarizing optical microscope), the analogous phenomenon for X-rays has been a virtually neglected topic. Here, we demonstrate the scope and potential for exploiting X-ray birefringence to determine the orientational properties of specific types of bonds in solids. Specifically, orientational characteristics of C–Br bonds in the bromocyclohexane/thiourea inclusion compound are elucidated from X-ray birefringence measurements at energies close to the bromine K-edge, revealing inter alia the changes in the orientational distribution of the C–Br bonds associated with a low-temperature order–disorder phase transition. From fitting a theoretical model to the experimental data, reliable quantitative information on the orientational properties of the C–Br bonds is determined. The experimental strategy reported here represents the basis of a new approach for gaining insights into the orientational properties of molecules in anisotropic materials.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Chemistry Earth and Environmental Sciences |
Subjects: | Q Science > QD Chemistry |
Uncontrolled Keywords: | X-ray birefringence; phase transition; molecular orientation; synchrotron; solid inclusion compound |
Publisher: | ACS Publications |
ISSN: | 1948-7185 |
Last Modified: | 21 Oct 2022 10:38 |
URI: | https://orca.cardiff.ac.uk/id/eprint/40864 |
Citation Data
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