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Keywords:

  • N,O ligands;
  • coordination compound;
  • hydrothermal synthesis;
  • fluorescence spectrum

Abstract

Quinoline-8-oxy-acetate acid (8-qoacH) reacts with M(II) (M=Pb and Cd) to give rise to two coordination complexes [Pb(8-qoac)2] (1) and [Cd(8-qoac)(bdc)0.5(H2O)2] (2) under hydrothermal conditions. They are characterized by single-crystal X-ray diffraction, IR, elemental, thermal analyses and luminescent analysis. The Pb metal centers connect the 8-qoac anions to form a 1D linear chain in 1. In 2, two symmetrical [Cd(8-qoac)(H2O)2] are bridged by a 1,4-bdc2− to generate a coordination unit [Cd(8-qoac)(bdc)0.5(H2O)2], and all the units are further connected to a 2D supramolecular layer-like structure via hydrogen bonds. TG analyses indicate that 1 exhibits higher thermostability than 2. Fluorescence spectrum of compound 2 in solid state shows strong fluorescence property.