Two Novel Two-Dimensional Lanthanide (III) Coordination Polymers Constructed from Isonicotinic Acid and Iminodiacetic Acid: Synthesis, Structure, and Luminescence Properties

Two novel two-dimensional Ln coordination polymers (CPs) [Ln(3) (mu(3)-OH)(IN)(3)(HIDA) (IDA)(2)](n) (Ln = Eu, 1; Sm, 2; HIN = isonicotinic acid, and H(2)IDA = iminodiacetic acid) have been successfully synthesized under solvothermal conditions and characterized by IR, TG, and elemental analyses. The structures of 1 and 2 were determined by single-crystal X-ray structural analysis, which shows that Ln(III) ions interconnect through HIN and H(2)IDA molecules to generate a 1D chain, and the adjacent chains are joined together by the same form to form the 2D zonary plane of 1 and 2. Meanwhile, We also studied luminescence properties of 1 and 2. The luminescence lifetime and quantum yield of 1 are 1.32 ms and 25.30%, which are significantly longer and higher than the values obtained for reported Eu3+ coordination polymers in the solid state at room temperature. [GRAPHICS] .