Synthesis, characterization, and optical properties of lead(II) coordination polymers and nanosize lead oxide core of polymer

Abstract

Two new three-dimensional lead(II) coordination polymers, [Pb2(4-bpdb)(NO3)4] n and [[Pb(4-bpdb)(NO3)(PhN2O2)]2] n , were prepared and characterized by 1H and 13C NMR, IR, and UV spectroscopy and elemental analysis. In addition, the molecular structure of [(Pb(4-bpdb)(NO3)(PhN2O2))2] n was determined by single-crystal X-ray diffraction. Photoluminescence properties of complexes showed that a good correlation exists between the structure of complexes and emission wavelengths. Utilization of cupferron ligand as a second ligand in the structure of [[Pb(4-bpdb)(NO3)(PhN2O2)]2] n enhanced the luminescence properties of it in comparison to [Pb2(4-bpdb)(NO3)4] n . Application of [[Pb(4-bpdb)(NO3)(PhN2O2)]2] n in fabrication of an organic light-emitting diode has been demonstrated. Nano-lead(II) oxide core that resulted from direct thermal decomposition of complex [[Pb(4-bpdb)(NO3)(PhN2O2)]2] n at 600 °C in air was characterized by X-ray powder diffraction and scanning electron microscopy. The photoluminescence emission spectrum of the nanosize lead(II) oxide core revealed a strong blue emission band centered at 462 nm, which might be associated with oxygen vacancies.