Journal of the American Chemical Society · 2002 · 77 citations · 16 references
Natural SciencesChemistryCrystal StructureInorganic ChemistryMagnetic MaterialsCalixarene ChemistryCluster ChemistryCluster CompoundsCoordination ChemistryMetal-ligand BondingTransition Metal ComplexesBonding OrbitalsCluster SynthesisMetal-sulfur ClustersStructural Characterization Of ClustersSupramolecular Coordination ComplexesTemperature DependenceTransition Metal Clusters
A nanosized decacopper(II) cluster complex was synthesized using p-tert-butylthiacalix[6]arene as a ligand. In the complex, the calixarene assumes a "pinched cone" conformation and acts as an undecadentate ligand via six phenoxy oxygen and five sulfur atoms. The resulting pentacopper(II) subunits are connected by two hydroxo and two oxo groups to form decacappoer(II) cluster core. The core structure remains intact in alcoholic solution as shown by ESI MS. The temperature dependence of chimT clearly shows ferromagnetic behavior of the core due to orthogonality between two adjoining magnetic orbitals of copper(II) ions.
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