Heterometallic Octanuclear Ni(4)(II)Ln(4)(III) (Ln = Y, Gd, Tb, Dy, Ho, Er) Complexes Containing Ni(2)(II)Ln(2)(III)O(4) Distorted Cubane Motifs: Synthesis, Structure, and Magnetic Properties Kalita, Pankaj Goura, Joydeb Herrera Martínez, Juan Manuel Colacio Rodríguez, Enrique Chandrasekhar, Vadapalli The reaction of 2-methoxy-6-[{2-(2-hydroxyethylamino)ethylimino}methyl] phenol (LH3) with lanthanide metal salts followed by the addition of nickel acetate allowed isolation of a family of octanuclear complexes, [Ni4Ln4(μ2-OH)2(μ3- OH)4(μ-OOCCH3)8(LH2)4]·(OH)2·xH2O. Single crystal X-ray diffraction studies of these complexes reveal that their central metallic core consists of two tetranuclear [Ni2Ln2O4] cubane subunits fused together by acetate and hydroxide bridges. The magnetic study of these complexes reveals a ferromagnetic interaction between the LnIII and the NiII center. The magnitude of exchange coupling between the NiII and LnIII center, parametrized from the magnetic data of the Gd analogue, gives J = +0.86 cm−1. The magneto caloric effect, studied for the NiII 4GdIII 4 complex, shows a maximum of magnetic entropy change, −ΔSm = 22.58 J kg−1 K−1 at 3 K for an applied external field of 5 T. 2019-05-07T12:37:01Z 2019-05-07T12:37:01Z 2018-05-14 info:eu-repo/semantics/article Kalita, P. et. al. Heterometallic Octanuclear Ni(4)(II)Ln(4)(III) (Ln = Y, Gd, Tb, Dy, Ho, Er) Complexes Containing Ni(2)(II)Ln(2)(III)O(4) Distorted Cubane Motifs: Synthesis, Structure, and Magnetic Properties. ACS Omega 2018, 3, 5202−5211 [http://dx.doi.org/10.1021/acsomega.8b00292] http://hdl.handle.net/10481/55652 10.1021/acsomega.8b00292 eng http://creativecommons.org/licenses/by-nc-nd/3.0/es/ info:eu-repo/semantics/openAccess Atribución-NoComercial-SinDerivadas 3.0 España American Chemical Society