Pressure-and temperature induced phase transitions, piezochromism, NLC behaviour and pressure controlled Jahn–Teller switching in a Cu-based framework
Charles J. McMonagle, Priyanka Comar, Gary S. Nichol, David R. Allan, J. González, José A. Barreda-Argüeso, Fernando Rodríguez, Rafael Valiente, Gemma F. Turner, Euan K. Brechin, Stephen A. Moggach
Abstract
single-crystal diffraction and spectroscopic techniques have been used to study a previously unreported Cu-framework bis[1-(4-pyridyl)butane-1,3-dione]copper(ii) (CuPyr-I). CuPyr-I was found to exhibit high-pressure and low-temperature phase transitions, piezochromism, negative linear compressibility, and a pressure induced Jahn-Teller switch, where the switching pressure was hydrostatic media dependent.
Topics & Concepts
ButaneJahn–Teller effectCopperDiffractionPhase (matter)CrystallographyChemistryMaterials scienceThermodynamicsPhysicsOrganic chemistryOpticsIonCatalysisOrganic and Molecular Conductors ResearchCrystallography and molecular interactionsMagnetism in coordination complexes