title: Magnetic "Molecular Oligomers" Based on Decametallic Supertetrahedra: A Giant Mn49 Cuboctahedron and its Mn25Na4 Fragment.
abstract: Two nanosized Mn49 and Mn25Na4 clusters based on analogues of the high-spin (S=22) [Mn(III)6Mn(II)4(μ4-O)4](18+) supertetrahedral core are reported. Mn49 and Mn25Na4 complexes consist of eight and four decametallic supertetrahedral subunits, respectively, display high virtual symmetry (O(h)), and are unique examples of clusters based on a large number of tightly linked high nuclearity magnetic units. The complexes also have large spin ground-state values (Mn49: S=61/2; Mn25Na4: S=51/2) with the Mn49  cluster displaying single-molecule magnet (SMM) behavior and being the second largest reported homometallic SMM.
authors.affiliation: Department of Chemistry, University of Cyprus, 1678 Nicosia (Cyprus).
authors.forename: Maria
authors.initials: M
authors.lastname: Manoli
authors.affiliation: Department of Chemistry, University of Cyprus, 1678 Nicosia (Cyprus).
authors.forename: Sofia
authors.initials: S
authors.lastname: Alexandrou
authors.affiliation: Department of Chemistry, University of Florida, Gainesville, FL 32611-7200 (USA).|Current address: Texas A&M University-Central Texas, Department of Science and Mathematics, Killeen, TX 76549 (USA).
authors.forename: Linh
authors.initials: L
authors.lastname: Pham
authors.affiliation: Instituto de Ciencia de Materiales de Aragón and Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, 50009 Zaragoza (Spain).
authors.forename: Giulia
authors.initials: G
authors.lastname: Lorusso
authors.affiliation: Institut Neel, CNRS, BP 166, 25 Avenue des Martyrs, 38042 Grenoble Cedex 9 (France).
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Wernsdorfer
authors.affiliation: Instituto de Ciencia de Materiales de Aragón and Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, 50009 Zaragoza (Spain).
authors.forename: Marco
authors.initials: M
authors.lastname: Evangelisti
authors.affiliation: Department of Chemistry, University of Florida, Gainesville, FL 32611-7200 (USA).
authors.forename: George
authors.initials: G
authors.lastname: Christou
authors.affiliation: Department of Chemistry, University of Cyprus, 1678 Nicosia (Cyprus). atasio@ucy.ac.cy.
authors.forename: Anastasios J
authors.initials: AJ
authors.lastname: Tasiopoulos
keywords: O ligands; cluster compounds; magnetic properties; manganese; single-molecule magnets