Synthesis, Structures, and Photoluminescence of Two Novel Zinc(II) Compounds Containing 2-Acetylpyridine-aminoguanidine
Mirjana M. Radanović,
Ljiljana S. Vojinović-Ješić,
Miodrag G. Jelić,
Elias Sakellis,
Berta Barta Holló,
Vukadin M. Leovac,
Marko V. Rodić
Affiliations
Mirjana M. Radanović
Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
Ljiljana S. Vojinović-Ješić
Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
Miodrag G. Jelić
NTT Data Global IT Innovator, 300000 Timisoara, Romania
Elias Sakellis
National Centre for Scientific Research “Demokritos”, Institute of Nanoscience and Nanotechnology, Terma (End) Patriarhou Gregoriou Str, P.O. Box 60228 Aghia Paraskevi, 15310 Athens, Greece
Berta Barta Holló
Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
Vukadin M. Leovac
Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
Marko V. Rodić
Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21000 Novi Sad, Serbia
In the reaction of zinc(II) sulfate and the chloride salt of 2-acetylpyridine-aminoguanidine, two types of complex were obtained, i.e., [Zn(H2O)6](H2L)2(SO4)3·3H2O and [Zn(L)H2O(SO4)]·H2O, depending on the presence of LiOAc as the deprotonating agent. The physicochemical, structural, and photoluminescence properties of the complexes were examined. In the first complex, obtained in the absence of LiOAc, the Schiff base had the role of a counter-ion in its doubly protonated form, while in the presence of LiOAc, upon deprotonation, coordination takes place, and thus the Schiff base acts as a tridentate N3 ligand. In the latter complex, the ligand is coordinated through pyridine, azomethine, and the imino nitrogen of the aminoguanidine residue, leading to formation of two fused five-membered chelate rings. Both the examined complexes, as well as the ligand itself, show high photoluminescence.
