title: Reversible piezochromism in a molecular wine-rack.
abstract: The highly-polymorphic, strongly-coloured 'ROY' system exhibits a yellow → orange → red piezochromic response under hydrostatic compression. The 'Y' (yellow) polymorph accommodates the effect of pressure via a wine-rack-type mechanism, made accessible by the conformational flexibility of the molecule, while retaining the crystal symmetry of the parent Y form. Decompression from 1.49 GPa demonstrates reversibility of this behaviour.
authors.affiliation: Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, UK. nicholas.funnell@chem.ox.ac.uk.
authors.forename: Elena L
authors.initials: EL
authors.lastname: Harty
authors.forename: Alex R
authors.initials: AR
authors.lastname: Ha
authors.forename: Mark R
authors.initials: MR
authors.lastname: Warren
authors.forename: Amber L
authors.initials: AL
authors.lastname: Thompson
authors.forename: David R
authors.initials: DR
authors.lastname: Allan
authors.forename: Andrew L
authors.initials: AL
authors.lastname: Goodwin
authors.forename: Nicholas P
authors.initials: NP
authors.lastname: Funnell