Construction of three-dimensional Ln-Ag (Ln = Eu; Tm) coordination polymers based on isonicotinate and oxalate ligands

Two new 3D 4d-4f coordination polymer [Ln2Ag4(IN)5(ox)2(NO3)(H2O)2 · 3H2O] [Ln = Eu (1), Tm (2); IN = isonicotinate and ox = oxalate] had been synthesized and characterized. Both structures display same 3D heterometallic coordination frameworks based on rare zigzag lanthanide-oxalate-silver chains, Ag2(IN)3 units and IN linkers. The structures provide new opportunities for other 4d-4f heterometallic coordination frameworks containing isonicotinate ligand to be applied in the field of material science.