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RESEARCH PRODUCT

Coexistence of spin-crossover and antiferromagnetic coupling phenomena in the novel dinuclear Fe(II) complex [Fe(dpa)(NCS)2]2bpym

José Antonio RealVadim KsenofontovAna B. GasparAna B. GasparPhilipp Gütlich

subject

CrystallographyNuclear magnetic resonanceChemistrySpin crossoverIntramolecular forceMössbauer spectroscopyIntermolecular forceGeneral Physics and AstronomyPhysical and Theoretical ChemistryAtmospheric temperature rangePlateau (mathematics)Magnetic susceptibilityAntiferromagnetic coupling

description

Abstract The iron(II) spin crossover dinuclear compound [Fe(dpa)(NCS) 2 ] 2 bpym where dpa = 2,2 ′ -dipyridylamine and bpym = 2,2 ′ -bipyrimidine has been synthesized and characterized. Variable-temperature magnetic susceptibility and 57 Fe Mossbauer spectroscopy data provide evidence for a rather complete and continuous S=2 ( HS )↔S=0 (LS) spin-crossover behavior taking place in the temperature range 400–50 K (T 1/2 =245 K ) without the presence of a plateau at 50% of conversion. The absence of such plateau, which is characteristic of all dinuclear compounds so far studied, is interpreted in terms of synergetic effect between intramolecular and intermolecular interactions.

yearjournalcountryeditionlanguage
2003-05-01Chemical Physics Letters
https://doi.org/10.1016/s0009-2614(03)00560-8