Crystals of Aliphatic Derivatives of [Cu(acac)2] have Distinct Atomic‐Scale Mechanisms of Bending

Author:

Thompson Amy J.1ORCID,Powell Joshua A.1ORCID,Melville Jamie N.1,McMurtrie John C.2ORCID,Clegg Jack K.1ORCID

Affiliation:

1. School of Chemistry and Molecular Biosciences The University of Queensland St. Lucia QLD 4072 Australia

2. School of Chemistry and Physics and Centre for Materials Science Queensland University of Technology (QUT) Brisbane QLD 4000 Australia

Abstract

AbstractMolecular crystals displaying elastic flexibility have important applications in the fields of optoelectronics and nanophotonic technologies. Understanding the mechanisms by which these materials bend is critical to the design of future materials incorporating these properties. Based on the known elastic properties of bis(acetylacetonato)copper(II), a series of 14 aliphatic derivatives are synthesized and crystallized. All those which grew in a needle morphology display noticeable elasticity, with 1D chains of π‐stacked molecules parallel to the long metric length of the crystal a consistent crystallographic feature. Crystallographic mapping is used to measure the mechanism of elasticity at an atomic‐scale. Symmetric derivatives with ethyl and propyl side chains are found to have different mechanisms of elasticity, which are further distinguished from the previously reported mechanism of bis(acetylacetonato)copper(II). While crystals of bis(acetylacetonato)copper(II) are known to bend elastically via a molecular rotation mechanism, the elasticity of the compounds presented is facilitated by expansion of their π‐stacking interactions.

Funder

Australian Research Council

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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