pH Dependent structural diversity of lead compounds based on new flexible ligand [3-(2-pyridyl)-1-pyrazolyl] acetic acid

Two new Pb(II)/pypza compounds, namely, [Pb3(pypza)2Cl4] (1) and [Pb(pypza)Cl](2) (Hpypza = [3-(2-pyridyl)-1-pyrazolyl] acetic acid), have been synthesized through a hydrothermal method under different pH conditions, and characterized by single-crystal X-ray diffraction, element analysis, infrared spectra (IR). Compound 1 shows an unusual one-dimensional structure while compound 2 displays a novel two-dimensional network framework. Furthermore, the luminescence properties of 1 and 2 were investigated at room temperature in the solid state.