Journal article

Synthesis and spectroscopic characterization of a new family of Ni-4 spin clusters

A Sieber, C Boskovic, R Bircher, O Waldmann, ST Ochsenbein, G Chaboussant, HU Gudel, N Kirchner, J van Slageren, W Wernsdorfer, A Neels, H Stoeckli-Evans, S Janssen, F Juranyi, H Mutka

Inorganic Chemistry | AMER CHEMICAL SOC | Published : 2005

Abstract

A new family of tetranuclear Ni complexes [Ni(4)(ROH)(4)L(4)] (H(2)L = salicylidene-2-ethanolamine; R = Me (1) or Et (2)) has been synthesized and studied. Complexes 1 and 2 possess a [Ni(4)O(4)] core comprising a distorted cubane arrangement. Magnetic susceptibility and inelastic neutron scattering studies indicate a combination of ferromagnetic and antiferromagnetic pairwise exchange interactions between the four Ni(II) centers, resulting in an S = 4 spin ground state. Magnetization measurements reveal an easy-axis-type magnetic anisotropy with D approximately -0.93 cm(-)(1) for both complexes. Despite the large magnetic anisotropy, no slow relaxation of the magnetization is observed down ..

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