8-Hydroxyquinoline copper is one of the most popular and widely used organic compounds. It is an organic crystalline material consisting of two rings: a phenol ring fused with a pyridine ring. 8-hydroxyquinoline Copper and its derivatives have been found in organic light emitting diodes (OLEDs) and metal ion fluorescent chemical sensors for a variety of applications, from pharmacology and drugs to electronic carriers. In the medical field, copper 8-hydroxyquinoline derivatives can be used as insecticides, antibacterials, fungicidal, neuroprotective and anti-HIV agents. In addition, since 8-HQ derivatives have chelating ability to a variety of metal cations, many applications have been found in fluorescence detection of biologically and environmentally important metal ions such as Al 3+ and Zn 2+. .8-Hydroxyquinoline copper ligands have been used for analytical purposes and separation techniques. They are excellent reagents for gravimetric analysis for the extraction of metal ions. It is well known that copper 8-quinolinol has weak fluorescence due to the intermolecular proton transfer of OH-functional protons to the nitrogen of the pyridine moiety. The chelated metal ion reacts with copper 8-quinolinol, which greatly increases the fluorescence emission of the ligand. The increase in emission appears to be mainly due to the increase in molecular stiffness.