Structure and tuneable luminescence in polymeric zinc compounds based on 3-(3-pyridyl)-5-(4-pyridyl)-1,2,4-triazole
Alexey Gusev, Elena Braga, Yuriy Baluda, Mikhail A. Kiskin, Mariya A. Kryukova, Nataliya Karaush‐Karmazin, Glib Baryshnikov, Artem V. Kuklin, Boris F. Minaev, Hans Ågren, Wolfgang Linert
Abstract
Inorganic–organic hybrid polymers based on 3-(3-pyridyl)-5-(4-pyridyl)-1,2,4-triazole (3,4-Hbpt) ligand were synthesized and subsequently characterized by single-crystal X-ray diffraction, FT–IR spectra, elemental analyses, thermogravimetric (TG) analyses and PXRD. The X-ray diffraction analyses revealed that the complexes [Zn(3,4-Hbpt)Cl2] and [Zn(3,4-Hbpt)Br2] possess a 1-D helical chain structure constructed of the 3,4-Hbpt ligands connecting the zinc cations. The [Zn(3,4-bpt)(OAc)] complex demonstrates a 2D sheet structure bridged by tridentate 3,4-bpt-anions. All compounds exhibit substantial thermal stability and show photo-fluorescent properties that result from the ligand π–π* transition. Ultraviolet-to-visible tunable emission for two of the complexes is observed.