A blue emission of zirconium (IV) complex based on 2, 6-pyridinedicarboxylic acid ligand: Syntheses, crystal structure, and luminescence sensing

A novel blue emission of zirconium complex, formulated as [Zr(pydc) 3 ]·[(CH 3 ) 2 NH 2 ] 2 ( 1 ), has been synthesized by using a mixture of zirconium nitrate and 2, 6-pyridinedicarboxylic acid (H 2 pydc). The complex 1 presents a three-dimensional supramolecular network structure due to the intermolecular N H···O, O H···O hydrogen bonds. Additionally, the crystals of 1 exhibit blue luminescence and demonstrate a highly selective and sensitive sensing capability for detection of Co 2+ ions with a K sv value of 1.22 × 10 4 M −1 and limit of detection (LOD) of 1.20 × 10 −5  M. Furthermore, the fluorescence lifetime and quantum yield of the complex 1 is τ = 6.22 μs and Φ = 25.9 %.