6533b86dfe1ef96bd12ca081
RESEARCH PRODUCT
Pressure-tuning of magnetism and linkage isomerism in iron(II) hexacyanochromate.
Georgiy LevchenkoEugenio CoronadoMari Carmen Giménez-lópezValentín García-baonzaMoshe Paz-pasternak§Moshe Paz-pasternak§Moshe Paz-pasternak§Francisco M. RomeroAnd Alla Milnersubject
Prussian blueMagnetic domainMagnetismCyanideGeneral ChemistryMagnetic hysteresisBiochemistryCatalysischemistry.chemical_compoundMagnetizationCrystallographyColloid and Surface ChemistrychemistryDiamagnetismLinkage isomerismhuman activitiesNuclear chemistrydescription
A pressure-induced linkage isomerization of the cyanide anion has been observed in single crystals of a chromium(III)-iron(II) Prussian blue analogue of formula K0.4Fe4[Cr(CN)6]2.8 square1.2.16H2O (1). Upon application of pressure in the 0-1200 MPa range, the cyanide ligand rotates and becomes C-bonded to the iron(II) cations, leading to a stabilization of their diamagnetic low-spin states. The result is a decrease of magnetization and magnetic ordering temperatures from TC = 19 K at ambient pressure to 13 K at 1200 MPa. The initial magnetic properties can be restored on pressure release. The reversible movement of cyanide in the solid state can be exploited as a switch of the magnetic interaction at the molecular level.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-03-10 | Journal of the American Chemical Society |