title: Dodecanuclear [Cu(II)6Gd(III)6] nanoclusters as magnetic refrigerants.
abstract: A novel dodecanuclear complex, [{(HL)(L)(DMF)Cu(II)Gd(III)(DMF)(H(2)O)}(6)]·6DMF (1; DMF = N,N-dimethylformamide), has been obtained using the ligand resulting from the condensation of 3-formylsalicylic acid with hydroxylamine (H(3)L). The exchange interaction between the phenoxo-bridged Cu(II) and Gd(III) ions is weak ferromagnetic (J = +1.01 cm(-1)). The combination of a high-spin ground state with small anisotropy leads to a significant magnetocaloric effect [-ΔS(m)(0-7 T) = 23.5 J K g(-1) K(-1) at ∼2 K].
authors.affiliation: Inorganic Chemistry Laboratory, Faculty of Chemistry, University of Bucharest, Str. Dumbrava Rosie nr. 23, 020464 Bucharest, Romania.
authors.forename: Alina S
authors.initials: AS
authors.lastname: Dinca
authors.forename: Alberto
authors.initials: A
authors.lastname: Ghirri
authors.forename: Augustin M
authors.initials: AM
authors.lastname: Madalan
authors.forename: Marco
authors.initials: M
authors.lastname: Affronte
authors.forename: Marius
authors.initials: M
authors.lastname: Andruh