A trimetallic strategy towards Zn II4Dy III2Cr III2 and Zn II4Dy III2Co III2 single-ion magnets

Abstract

Two cyano- and phenoxo-bridged octanuclear complexes Zn^II₄Dy^III₂Co^III₂ (complex 1) and Zn^II₄Dy^III₂Cr^III₂ (complex 2) with diamagnetic Zn(II) and Co(III) are reported. Dy(III) is surrounded by nine oxygen atoms of two [Zn(Me₂valpn)] (Me₂valpn²⁻ = dianion of N,N′-2,2-dimethylpropylenebis(3-methoxysalicylideneimine)) and one water molecule. Magnetic studies reveal that both exhibit single-ion magnet (SIM) behavior with the energy barrier of 85.9 K for complex 1 and 100.9 K for complex 2.