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Resumen: The effect of pressure (up to 0.17 GPa) 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 180 K 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 140 K GPa-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).
Idioma: Inglés
DOI: 10.1107/S2052520614003023
Año: 2014
Publicado en: Acta Crystallographica Section B-Structural Science Crystal Engineering and Materials 70, 3 (2014), 436-443
ISSN: 2052-5192
Financiación: info:eu-repo/grantAgreement/ES/MICINN/CSD2007-00010
Financiación: info:eu-repo/grantAgreement/ES/MINECO/CTQ2010-18414
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2011-24284
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2011-27233-C02-02
Tipo y forma: Article (Published version)
Área (Departamento): Ciencia de los Materiales e Ingeniería Metalúrgica (Departamento de Ciencia y Tecnología de Materiales y Fluidos)

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Articles > Artículos por área > Ciencia de los Materiales e Ingeniería Metalúrgica