Structural Characterization and Luminescence Properties of Two 4d-4fLn-Ag Coordination Compounds Based on Dinuclear Lanthanide Clusters

Two new compounds,ErAg(INA)₂(C₂O₄)]·2H₂O(1)(HINA=nicotinic acid) and Tb_0.8Y_0.2Ag₂(IN)₄·(H₂O)₅]·NO₃·2H₂O(2)(HIN=isonicotinic acid), based on the {Ln₂} building units, have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction, infrared spectroscopy, thermal analysis and powder X-ray diffraction(PXRD). Single-crystal X-ray diffraction data reveal that both compounds crystallized in the low-symmetry triclinic space group P1. Compound 1 is a 3D heterometallic coordination framework based on {Er₂} clusters, oxalate ligands and bridging Ag(INA)] linkers, while compound 2 consists of 0D Tb_0.8·Y_0.2Ag₂(IN)₄(H₂O)₅]₂ subunits that give a 3D supramolecular structure through hydrogen bond interaction. The photoluminescent properties of both compounds(1 and 2) were studied.