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Elastically Flexible Crystals have Disparate Mechanisms of Molecular Movement Induced by Strain and Heat |
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| Authors: | Dr Aidan J Brock Jacob J Whittaker Joshua A Powell Dr Michael C Pfrunder Dr Arnaud Grosjean Prof Simon Parsons Prof John C McMurtrie Prof Jack K Clegg |
| Affiliation: | 1. School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, Australia;2. School of Molecular Sciences, The University of Western Australia, Crawley, WA, Australia;3. Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh, UK;4. School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, Australia |
| Abstract: | Elastically flexible crystals form an emerging class of materials that exhibit a range of notable properties. The mechanism of thermal expansion in flexible crystals of bis(acetylacetonato)copper(II) is compared with the mechanism of molecular motion induced by bending and it is demonstrated that the two mechanisms are distinct. Upon bending, individual molecules within the crystal structure reversibly rotate, while thermal expansion results predominantly in an increase in intermolecular separations with only minor changes to molecular orientation through rotation. |
| Keywords: | copper(II) crystallography flexible crystals supramolecular thermal expansion |
