Dongare, G. M.; Aswar, A. S. A Heterocyclic N’-(4-(diethylamino)-2-Hydroxybenzylidene)-4-Oxopiperidine-1-Carbohydrazide Schiff Base Ligand and Its Metal Complexes: Synthesis, Structural Characterization, Thermal Behavior, Fluorescence Properties, and Biological Activities. Eur. J. Chem. 2022, 13, 415-425.