Elastically Flexible Crystals have Disparate Mechanisms of Molecular Movement Induced by Strain and Heat.

Elastically Flexible Crystals have Disparate Mechanisms of Molecular Movement Induced by Strain and Heat.
Angew Chem Int Ed Engl. 2018 Jul 12;:
Authors: Brock AJ, Whittaker JJ, Powell JA, Pfrunder MC, Grosjean A, Parsons S, McMurtrie JC, Clegg JK
Abstract
Elastically flexible crystals are an emerging class of materials that exhibit a range of notable properties. Here, we compare the mechanism of thermal expansion in flexible crystals of bis(acetylacetonato)copper(II) with the mechanism of molecular motion induced by bending and show that they 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.
PMID: 29998602 [PubMed - as supplied by publisher]

Source: Angewandte Chemie - July 12, 2018 Category: Chemistry Authors: Brock AJ, Whittaker JJ, Powell JA, Pfrunder MC, Grosjean A, Parsons S, McMurtrie JC, Clegg JK Tags: Angew Chem Int Ed Engl Source Type: research