Single-molecule magnets: out-of-phase ac susceptibility signals from tetranuclear vanadium(III) complexes with an S = 3 ground state

Abstract

The salts of the tetranuclear vanadium(III) ions [V4O2(O2- CEt)7(L–L)2]z (L–L = bpy, z = +1; L–L = pic–, z = –1) with a V4 butterfly topology and a S = 3 ground state have been found to exhibit out-of-phase ac susceptibility signals, a signature of single-molecule magnets.