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Elastically Flexible Crystals have Disparate Mechanisms of Molecular Movement Induced by Strain and Heat
Author(s) -
Brock Aidan J.,
Whittaker Jacob J.,
Powell Joshua A.,
Pfrunder Michael C.,
Grosjean Arnaud,
Parsons Simon,
McMurtrie John C.,
Clegg Jack K.
Publication year - 2018
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201806431
Subject(s) - intermolecular force , molecule , bending , chemical physics , mechanism (biology) , thermal expansion , rotation (mathematics) , crystallography , materials science , crystal (programming language) , thermal motion , thermal , molecular dynamics , crystal structure , copper , orientation (vector space) , strain (injury) , rotation around a fixed axis , chemistry , computational chemistry , composite material , thermodynamics , classical mechanics , physics , geometry , medicine , mathematics , organic chemistry , quantum mechanics , computer science , metallurgy , programming language
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.