Seven 3d-4f coordination polymers of macrocyclic oxamide with polycarboxylates: Syntheses, crystal structures and magnetic properties

Seven novel oxamido-bridged 3d-4f heterometallic coordination polymers with benzotriazole-5-carboxylate or 5-nitroisophthalate co-ligands under solvothermal reaction conditions. Polymers 1-7 hold 1D or 2D framework structure, viz., double-strand meso-helical chain of 1-5, four-strand meso-helical chain of 6, and 2D net of 7 consisting of four-strand meso-helical chain. Moreover, the temperature dependences of magnetic susceptibilities of compounds 1-7 were also studied.397