Unusual 3D pillared-layer Pb(II) complex supported by mercapto-triazole ligand: Synthesis, structure and luminescent property

Reaction of 4-amino-3-(4-pyridyl)-5-mercapto-1,2,4-triazole (a-Hptt) with PbCl2 hydrothermally has yielded complex [PbCl(ptt)]n (1) at pH 5. And the ligand a-Hptt can be deaminated and transformed into Hptt under hydrothermal condition (pH 5). The structure of 1 has been fully characterized by single crystal X-ray diffraction, elemental analysis, IR, as well as luminescent property. Structural analysis reveals that complex 1 is constructed from 2D two-component layers, which alternately arrange in the ⋯ABAB⋯ pattern, and then further pillared by Hptt ligands into an interesting 3D “pillared-layer” architecture. Complex 1 also shows strong luminescence emission in solid state at room temperature and may be suitable as a candidate for potentially photoactive material.