Two novel zinc compounds with in situ formation of 3,5-bis(4-pyridyl)-1H-1,2,4-triazole

Two novel zinc compounds, namely, [Zn(4,4'-Hbpt)Cl-2](n) (1) and [Zn(4,4'-Hbpt)Br-2](n) (2) (4,4'-Hbpt = 3,5-bis(4-pyridyl)-1H-1,2,4-triazole) have been hydrothermally synthesized. Their structures have been determined by single-crystal X-ray diffraction analyses, and further characterized by elemental analyses, powder X-ray diffraction (PXRD), infrared spectra (IR), and thermogravimetric (TG) analyses. Compound 1 exhibits a 1-D helical chain structure constructed by 4,4'-Hbpt ligands connecting zinc cations. The helical chains with different hands further link to each other via weak intermolecular hydrogen bonds (Ar-H center dot center dot center dot Cl, Ar-H center dot center dot center dot N) to form a 2-D antiparallel beta sheet-like layer, while, compound 2 reveals a 1-D zigzag achiral chain structure. The photoluminescence and thermal stability studies indicate both compounds are good candidates as efficient luminescent materials. Crown Copyright (c) 2013 Published by Elsevier B.V. All rights reserved.