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Título: | Heterobimetallic MOFs containing tetrathiocyanometallate building blocks: Pressure-induced spin crossover in the porous {Fe II(pz)[Pd II(SCN) 4]} 3D coordination polymer |
Autor: | Rodríguez-Velamazán, J. A. CSIC ORCID | Fecha de publicación: | 2012 | Editor: | American Chemical Society | Citación: | Inorganic Chemistry 51(20): 11126-11132 (2012) | Resumen: | Here we describe the synthesis, structure, and magnetic properties of two related coordination polymers made up of self-assembling Fe(II) ions, pyrazine (pz), and the tetrathiocyanopalladate anion. Compound {Fe(MeOH) 2[Pd(SCN) 4]}·pz (1a) is a two-dimensional coordination polymer where the Fe(II) ions are equatorially coordinated by the nitrogen atoms of four [Pd(SCN) 4] 2- anions, each of which connects four Fe(II) ions, forming corrugated layers {Fe[Pd(SCN) 4]} ∞. The coordination sphere of Fe(II) is completed by the oxygen atoms of two CH 3OH molecules. The layers stack one on top of each other in such a way that the included pz molecule establishes strong hydrogen bonds with the coordinated methanol molecules of adjacent layers. Compound {Fe(pz)[Pd(SCN) 4]} (2) is a three-dimensional porous coordination polymer formed by flat {Fe[Pd(SCN) 4]} ∞ layers pillared by the pz ligand. Thermal analysis of 1a shows a clear desorption of the two coordinated CH 3OH molecules giving a rather stable phase (1b), which presumably is a polymorphic form of 2. The magnetic properties of the three derivatives are typical of the high-spin Fe(II) compounds. However, compounds 1b and 2, with coordination sphere [FeN 6], show thermal spin crossover behavior at pressures higher than ambient pressure (10 5 MPa). © 2012 American Chemical Society. | URI: | http://hdl.handle.net/10261/73590 | DOI: | 10.1021/ic3016673 | Identificadores: | doi: 10.1021/ic3016673 issn: 0020-1669 e-issn: 1520-510X |
Aparece en las colecciones: | (ICMA) Artículos |
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