Organic-inorganic hybrid lanthanide-silver heterometallic coordination frameworks constructed from oxalate and sulfate anion: Syntheses, structures, and photoluminescent properties

摘要

The first four examples of organic-inorganic hybrid lanthanide-silver heterometallic frameworks, namely, [AgLn(μ5-C2O 4)(SO4)(H2O)2] [Ln = Eu (1) and Sm (2)] and [AgLn(μ4-C2O4) 0.5(μ6-C2O4) 0.5(SO4)(H2O)] [Ln = Tb (3) and Dy (4)] based on oxalate and sulfate anions were synthesized by hydrothermal reactions of lanthanide oxide, silver nitrate, oxalic acid and sulfuric acid. All structures contain ladder-like inorganic lanthanide sulfato chains, which are further connected together through silver atoms by oxalate anions with different coordination behavior (μ5-C2O4: 1 and 2, μ6-C2O4 mixed μ4-C 2O4: 3 and 4) to generate two types of 3D networks. The luminescent properties of these compounds were also studied.