Construction of Designated Heptanuclear Metal 8-hydroxyquinolates with Different Ions and Auxiliary Coligands

The series of metal 8-hydroxyquinolates {[Ni7 (μ2-L1)6(μ3-L1)2(OAc)2(μ7-L2)(OCH3)]·CH3OH·CH3CN} (1), {[Ni7(μ2-L1)6(μ3-L1)3(SCN)2(μ7-L2)(CH3CN)]·(CH3OH)2·CH3CN} (2), [Ni5Dy2(μ2-L1)6(OAc)4(μ7-L2)2] (3), [Ni6Dy(μ2-L1)6(μ3-L1)2(OAc)3(μ7-L2)(OCH3)] (4), and [Ni6Dy(μ2-L1)6(μ3-L1)2(OAc)2(NO3)(OH)2(OCH3)2] (5) (HL1 = 8-hydroxyquinoline, H3L2 = 1,1,1-tris(hydroxymethyl)ethane) has been solvothermally prepared. Those clusters feature a heptanuclear disklike structure with 8-hydroxyquinolines as corner ligands restricting the expansion of the triangular lattice in spite of the metal ions or auxiliary coligands. The magnetic properties of those complexes vary according to metal ions and auxiliary coligands, for which slow magnetic relaxation is found in 5.