Synthesis, Structure, and Fluorescence Features of a Dinuclear Zinc Complex Based on a Quinoline-Containing Schiff Base Ligand

Zinc coordination compounds contribute a lot to chemistry, acting in catalytic processes, reactions in biology, and the creation of photoluminescent materials. The type of ligands is necessary for making well-defined and used zinc coordination compounds. The research describes the synthesis and structural analysis and fluorescence behavior of zinc compound [Zn2L(OAc)3] (1), which was synthesized from Schiff base ligand HL (HL=2-{ldelim}[(2-hydroxy-3-methoxybenzyl)imino]methyl{rdelim}quinoline). The Schiff base ligand HL resulted from the condensation of quinoline-2-formaldehyde with o-vanillin. The photophysical properties of quinoline formaldehyde and the coordination flexibility of 3-methoxy-2-hydroxybenzylamine in compound 1 produce an asymmetric dinuclear structure that exhibits unique photoluminescent behavior. The characterization of compound 1 included FT-IR spectroscopy and elemental analysis, as well as single-crystal X-ray diffraction and powder X-ray diffraction. The fluorescence emission of compound 1 occurs in different solvents until nitrobenzene causes a significant reduction in its emission. Therefore, we can see that compound one can detect nitroaromatic hazardous substances through fluorescence.