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RESEARCH PRODUCT
Electrical Bistability around Room Temperature in an Unprecedented One-Dimensional Coordination Magnetic Polymer
Avelino MartínFélix ZamoraCarlos J. Gómez-garcíaDiego HernándezElisa HernándezEsther DelgadoPilar Amo-ochoasubject
Models MolecularCalorimetry Differential ScanningMolecular StructurePolymersCoordination polymerbusiness.industryTemperatureElectronsCrystal structureActivation energyInorganic Chemistrychemistry.chemical_compoundHysteresisCrystallographyMagnetic FieldsDifferential scanning calorimetrySemiconductorchemistryElectrical resistivity and conductivityOrganometallic CompoundsAntiferromagnetismPhysical and Theoretical Chemistrybusinessdescription
The synthesis, crystal structure, and physical properties of an unprecedented one-dimensional (1D) coordination polymer containing [Fe2(S2C6H2Cl2)4](2-) entities bridged by dicationic [K2(μ-H2O)2(THF)4](2+) units are described. The magnetic properties show that the title compound presents pairwise Fe-Fe antiferromagnetic interactions that can be well reproduced with a S = 1/2 dimer model with an exchange coupling, J = -23 cm(-1). The electrical conductivity measurements show that the title compound is a semiconductor with an activation energy of about 290 meV and two different transitions, both with large hysteresis of about 60 and 30 K at 260-320 K and 350-380 K, respectively. These two transitions are assumed to be due to slight structural changes in the cation-anion interactions. Differential Scanning Calorimetry confirms the presence of both transitions. This compound represents the first sample of a coordination polymer showing electrical bistability.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-05-03 | Inorganic Chemistry |