A neodymium coordination polymer with mixed m-phenylenediacrylate and formate bridges: Synthesis, unprecedented topology, and magnetism

A new lanthanide(III) coordination polymer with mixed m-phenylenediacrylate (mpda) and formate bridges, [Nd(mpda)(HCOO)(H2O)]n was synthesized by a solvothermal reaction involving the in situ formation of formate from N,N-dimethyl formamide. The three-dimensional metal-organic framework contains μ3-formate-bridged Nd(III) layers pillared by the mpda ligand and exhibits an unprecedented 3,7-connected topology with Schläfli symbol (4,62)2(42,6)(47,64,810). The magnetic properties are typical of the Nd(III) 4I9/2 ground state perturbed by ligand field and probable antiferromagnetic exchange through triple μ2-oxygen bridges.