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RESEARCH PRODUCT
Temperature- and pressure-dependent structural study of {Fe(pmd) 2[Ag(CN)2 ]2}n spin-crossover compound by neutron Laue diffraction
José Antonio RealMiguel A. CastroLaura Cañadillas-delgadoJosé Alberto Rodríguez-velamazánGarry J. Mcintyresubject
Pressure-temperatureChemistryMetals and AlloysSpin transitionChromophoreChromophoresAtomic and Molecular Physics and OpticsSpin-crossover compoundsElectronic Optical and Magnetic MaterialsCrystallographyOctahedronSpin crossoverX-ray crystallographyMaterials ChemistryNeutronOrthorhombic crystal systemMagnetic materialsAmbient pressuredescription
The effect of pressure (up to 0.17GPa) on the spin-crossover compound {Fe(pmd)2[Ag(CN)2]2} n [orthorhombic isomer (II), pmd = pyrimidine] has been investigated by temperature- and pressure-dependent neutron Laue diffraction and magnetometry. The cooperative high-spin ↔ low-spin transition, centred at ca 180K at ambient pressure, is shifted to higher temperatures as pressure is applied, showing a moderate sensitivity of the compound to pressure, since the spin transition is displaced by ca 140KGPa-1. The space-group symmetry (orthorhombic Pccn) remains unchanged over the pressure-temperature (P-T) range studied. The main structural consequence of the high-spin to low-spin transition is the contraction of the distorted octahedral [FeN6] chromophores, being more marked in the axial positions (occupied by the pmd units), than in the equatorial positions (occupied by four [Ag(CN)2]- bridging ligands). © 2014 International Union of Crystallography.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-01-01 |