Abstract

By control of mixed ligands with particular coordination sites, heterometallic coordination polymers, [Ln 2(H 2O) 2Ag(C 2O 4) 2(ina) 3] n (Ln = Eu ( 1), Dy ( 2), Hina = isonicotinic acid) and {[LnAg(C 2O 4)(na) 2]·2H 2O} 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.

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