Design of single chain magnets through cyanide-bearing six-coordinate complexes

The design and preparation of stable cyanide-bearing six-coordinate complexes of formula [M III(L)(CN) x ] ( x + l − m)− (M = trivalent transition metal ion and L = polydentate blocking ligand) are summarized here. Their use as ligands towards either fully hydrated metal ions or coordinatively unsat...

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Published inCoordination chemistry reviews Vol. 249; no. 23; pp. 2691 - 2729
Main Authors Lescouëzec, Rodrigue, Toma, Luminita Marilena, Vaissermann, Jacqueline, Verdaguer, Michel, Delgado, Fernando S., Ruiz-Pérez, Catalina, Lloret, Francesc, Julve, Miguel
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2005
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Summary:The design and preparation of stable cyanide-bearing six-coordinate complexes of formula [M III(L)(CN) x ] ( x + l − m)− (M = trivalent transition metal ion and L = polydentate blocking ligand) are summarized here. Their use as ligands towards either fully hydrated metal ions or coordinatively unsaturated preformed species, to afford a wide variety of low-dimensional metal assemblies whose nuclearity, dimensionality and magnetic properties can be tuned, is also reviewed. Special emphasis is put on the appropriate choice of the end-cap ligand L whose denticity determines the number of coordinated cyanide groups in the mononuclear precursors. Among the different new spin topologies obtained through this rational synthetic strategy, ferromagnetically coupled 4,2-ribbon like bimetallic chains which exhibit slow magnetic relaxation and hysteresis effects (chain as magnets) are one of the most appealing and constitute the heart of the present contribution.
ISSN:0010-8545
1873-3840
DOI:10.1016/j.ccr.2005.09.017