Wheel-type heterometallic ferromagnetic clusters: [Ni7−xMx(HL)6(μ3-OMe)4(μ3-OH)2]Cl2 (M = Zn, Co, Mn; x = 1, 3)

Abstract

Wheel-type heptanuclear heterometallic clusters of stoichiometry [Ni_7−xM_x(HL)₆(μ₃-OMe)₄(μ₃-OH)₂]Cl₂ (L = 1-(2-hydroxy-3-methoxybenzamido)-2-(benzylideneamino)ethane; M = Zn²⁺, Co²⁺, Mn²⁺; x = 1, 3) were synthesized, and their metal ion dependent ferromagnetic properties were investigated. It was demonstrated that the central position of each cluster was occupied by a Ni²⁺ ion while other metal ions (Zn²⁺, Co²⁺ or Mn²⁺) were accommodated in peripheral positions. The magnetic interactions, anisotropy and magnetization of the resultant clusters were all influenced by the combinations of metal ions present.