Construction of A sqc6 Topology Ni‐Gd Framework Employing 2,2’‐Phosphinico‐dibenzoate and Oxalate: Structure and Magnetic Properties

Abstract A 3d–4f heterometallic compound, namely [Ni 6 GdL 4 (ox)(H 2 O) 12 ]⋅[NO 3 ]⋅14.5H 2 O ( 1 ) (L=2,2’‐phosphinico‐dibenzoate and ox=oxalate), was obtained by self‐assembly of nickel nitrate, gadolinium nitrate, oxalic acid, and 2,2’‐phosphinico‐dibenzoic acid (H 3 L). Such compound has been structurally characterized via single‐crystal X‐ray diffraction analysis and infrared spectroscopy. This compound features a basic unit of {Ni 4 Gd} clusters and 2,2’‐phosphinico‐dibenzoate ligands. Each unit is connected by another Ni 2+ through the axial coordination of benzoate oxygen to form a layer. Meanwhile, each oxalate ligand bridges the expanded Ni 4 Gd‐Ni 4 net, constructing a 3‐D framework. From the viewpoint of network topology, this compound can be simplified as a sqc6 topology. Magnetic analysis shows ferromagnetic interactions between the Ni(II) and Gd(III) centers in Ni 4 Gd nodes and antiferromagnetic coupling with oxalate bridges in this compound.