Synthesis, Crystal Structures, and Photoluminescent Properties of Bis(pyrazol-1-yl)methane Derivative and Zn(II) Halide Complexes (ZnLX2, X˭Cl, Br, I)

A novel bis(pyrazol-1-yl)methane derivative 9-(4-(di(1H-pyrazol-1-yl) -methyl) phenyl)-9H-carbazole (L) and its zinc halide complexes (ZnLX2, X = Cl (1), Br (2), and I (3)) were prepared and fully characterized. The structures of the ligand (L) and complexes 2 and 3 were also characterized by single-crystal X-ray diffraction analysis. The results reveal that the central zinc(II) atom in the complexes is coordinated by two nitrogen atoms from ligands (L) and two halide anion forming a distorted tetrahedron coordination geometry. And then the hydrogen bonding interactions between the molecules from 1D to 3D supramolecular structures were investigated. Furthermore, the photophysical properties of the complexes 1–3 and L were investigated both experimentally and theoretically. The experimental results are consistent with that of the theoretical calculation.