3D pillar-layered coordination polymers based on 4d–4f heterometallic assembly

By control of mixed ligands with particular coordination sites, heterometallic coordination polymers, [Ln2(H2O)2Ag(C2O4)2(ina)3]n (Ln = Eu (1), Dy (2), Hina = isonicotinic acid) and {[LnAg(C2O4)(na)2]·2H2O}n (Ln = La (3), Tb (4), Hna = nicotinic acid), have been synthesized under hydrothermal conditions and characterized by elemental analysis, IR, thermogravimetric analysis (TGA), and single-crystal X-ray diffraction. These coordination polymers feature 3D pillar-layered coordination frameworks constructed from two-dimensional (2D) lanthanide–carboxylate layers and Ag(ina) or Ag(na) pillars. It is interesting that the in situ decarboxylation of pyridine-2,3-dicarboxylic acid into nicotinic acid was observed. The luminescent properties of 1 and 4 were also studied.

Heterometallic coordination polymers, [Ln2(H2O)2Ag(C2O4)2(ina)3]n (Ln = Eu, Dy, Hina = isonicotinic acid) and {[LnAg(C2O4)(na)2]·2H2O}n (Ln = La, Tb, Hna = nicotinic acid), have been synthesized under hydrothermal conditions. These coordination polymers feature 3D pillar-layered coordination frameworks constructed from two-dimensional lanthanide–carboxylate layers and Ag(ina) or Ag(na) pillars.Figure optionsDownload as PowerPoint slide