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dc.contributor.author | Gaspar, A. B. | es_ES |
dc.contributor.author | Muñoz Roca, María Del Carmen | es_ES |
dc.contributor.author | Moliner, N. | es_ES |
dc.contributor.author | Ksenofontov, V. | es_ES |
dc.contributor.author | Levchenko, G. | es_ES |
dc.contributor.author | Gütlich, P. | es_ES |
dc.contributor.author | Real, J. A. | es_ES |
dc.date.accessioned | 2020-09-22T03:32:04Z | |
dc.date.available | 2020-09-22T03:32:04Z | |
dc.date.issued | 2003-02 | es_ES |
dc.identifier.issn | 0026-9247 | es_ES |
dc.identifier.uri | http://hdl.handle.net/10251/150514 | |
dc.description.abstract | [EN] The monomeric compounds [Fe(abpt)(2)(NCX)(2)] (X = S (1), Se (2) and abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole) have been synthesized and characterized. They crystallize in the monoclinic P2(1)/n space group with a = 11.637(2)Angstrom, b = 9.8021(14)Angstrom, c = 12.9838(12)Angstrom, beta=101.126(14)degrees, and Z=2 for 1, and a=11.601(2)Angstrom, b=9.6666(14)Angstrom, c=12.883(2)Angstrom, beta=101.449(10)degrees, and Z= 2 for 2. The unit cell contains a pair mononuclear [Fe(abpt)2(NCX)21 units related by a center of symmetry. Each iron atom, located at a molecular inversion center, is in a distorted octahedral environment. Four of the six nitrogen atoms coordinated to the Fe(H) ion belong to the pyridine-N(l) and triazole-N(2) rings of two abpt ligands. The remaining trans positions are occupied by two nitrogen atoms, N(3), belonging to the two pseudo-halide ligands. The magnetic susceptibility measurements at ambient pressure have revealed that they are in the high-spin range in the 2 K-300 K temperature range. The pressure study has revealed that compound 1 remains in high-spin as pressure is increased up to 4.4kbar, where an incomplete thermal spin crossover appears at around T-1/2 = 65 K. Quenching experiments at 4.4 kbar have shown that the incomplete character of the conversion is a consequence of slow kinetics. Relatively sharp spin transition takes place at T-1/2 = 106, 152 and 179 K, as pressure attains 5.6, 8.6 and 10.5 kbar, respectively. | es_ES |
dc.description.sponsorship | This work was funded by the European Commission trough TMR-Network Thermal and Optical Switching of Spin States (TOSS) , Contract No. ERB-FMRX-CT98-0199EEC/TMR, the Deutsche Forschungsgemeinschaft, Schwerpunktprogramm Molekularer Magnetismus ,the Fondsder Chemischen Industrie and the Ministerio Español de Ciencia y Tecnología (project BQU 2001-2928). | es_ES |
dc.language | Inglés | es_ES |
dc.publisher | Springer-Verlag | es_ES |
dc.relation.ispartof | Monatshefte für Chemie - Chemical Monthly | es_ES |
dc.rights | Reserva de todos los derechos | es_ES |
dc.subject | Iron(II) complexes | es_ES |
dc.subject | Spin crossover | es_ES |
dc.subject | Polymorphism | es_ES |
dc.subject | X-ray structure determination | es_ES |
dc.subject | Pressure-induced spin transition | es_ES |
dc.subject.classification | FISICA APLICADA | es_ES |
dc.title | Polymorphism and Pressure Driven Thermal Spin Crossover Phenomenon in [Fe(abpt)2(NCX)2] (X = S, and Se): Synthesis, Structure and Magnetic Properties | es_ES |
dc.type | Artículo | es_ES |
dc.identifier.doi | 10.1007/s00706-002-0508-5 | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/EC//ERB-FMRX-CT98-0199EEC%2FTMR/EU/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MICYT//BQU2001-2928/ES/Msíntesis, Estructura y Propiedades Magnéticas de Compuestos con Interacción de Canje entre Centros Metálicos/ | es_ES |
dc.rights.accessRights | Cerrado | es_ES |
dc.contributor.affiliation | Universitat Politècnica de València. Departamento de Física Aplicada - Departament de Física Aplicada | es_ES |
dc.description.bibliographicCitation | Gaspar, AB.; Muñoz Roca, MDC.; Moliner, N.; Ksenofontov, V.; Levchenko, G.; Gütlich, P.; Real, JA. (2003). Polymorphism and Pressure Driven Thermal Spin Crossover Phenomenon in [Fe(abpt)2(NCX)2] (X = S, and Se): Synthesis, Structure and Magnetic Properties. Monatshefte für Chemie - Chemical Monthly. 134(2):285-294. https://doi.org/10.1007/s00706-002-0508-5 | es_ES |
dc.description.accrualMethod | S | es_ES |
dc.relation.publisherversion | https://doi.org/10.1007/s00706-002-0508-5 | es_ES |
dc.description.upvformatpinicio | 285 | es_ES |
dc.description.upvformatpfin | 294 | es_ES |
dc.type.version | info:eu-repo/semantics/publishedVersion | es_ES |
dc.description.volume | 134 | es_ES |
dc.description.issue | 2 | es_ES |
dc.relation.pasarela | S\24149 | es_ES |
dc.contributor.funder | European Commission | es_ES |
dc.contributor.funder | Deutsche Forschungsgemeinschaft | es_ES |
dc.contributor.funder | Ministerio de Ciencia y Tecnología | es_ES |