Brock Aidan J, Whittaker Jacob J, Powell Joshua A, Pfrunder Michael C, Grosjean Arnaud, Parsons Simon, McMurtrie John C, Clegg Jack K
School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD, 4072, Australia.
School of Molecular Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia.
Angew Chem Int Ed Engl. 2018 Aug 27;57(35):11325-11328. doi: 10.1002/anie.201806431. Epub 2018 Jul 30.
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.
弹性柔性晶体构成了一类新兴材料，这类材料展现出一系列显著特性。将双（乙酰丙酮）铜（II）柔性晶体中的热膨胀机制与弯曲诱导的分子运动机制进行了比较，结果表明这两种机制是不同的。在弯曲时，晶体结构内的单个分子会可逆地旋转，而热膨胀主要导致分子间间距增加，分子取向仅通过旋转有微小变化。
