Two Heterometallic Ionic Compounds with Isolated [3d] and [4f] Complex Units: Field‐Induced Single‐Ion Magnet (SIM) Behavior Observed from a Mononuclear Dysprosium(III) Complex

Abstract

AbstractTwo new complexes, [Fe3(μ3‐O)(inicH)6(H2O)3][Gd(NO3)6]·(NO3)4·nH2O (1) and [Fe3(μ3‐O)(inicH)6(H2O)3][Dy(NO3)5 (H2O)]·(NO3)5·n(H2O) (2) with two isolated complex moieties, were generated when isonicotinic acid was treated with iron(III) nitrate and the corresponding lanthanide(III) nitrate in water. The structures were determined by single‐crystal X‐ray diffraction studies. In these compounds, the anionic lanthanide complexes are encapsulated by trinuclear [Fe3(μ3‐O)(inicH)6(H2O)3]7+ cationic cluster units, which is facilitated by hydrogen‐bonding interactions. Investigation of the magnetic properties reveals that 2 shows slow relaxation of magnetization at low magnetic field (Hdc = 1.0 kOe), with an energy barrier of 23 K originating from a single [Dy(NO3)5(H2O)]2– anion.