EXTRACTION, PURIFICATION, AND COMBINATION OF LAPACHOL IN NOVEL EUROPIUM COMPLEX

Abstract

Lapachol belongs to the group of 1,4-naphthoquinones, with the addition of a hydroxide group attached to carbon 2 and a branched alkene nomenclature 3-methyl-2-butenyl attached to carbon 3, with final nomenclature 2-hydroxy-3 -(3-methyl-2-butenyl)-1,4-naphthoquinone. As a chromophore, it exhibits near-ultraviolet absorption, one of the important characteristics in the process of choosing ligands to integrate photoluminescent lanthanide complexes. Photoluminescent materials are currently widely used in the market for making plates, paints, plates, tapes, pigments, and other luminescent equipment. The use of what are called DMCLs (Molecular Light Converting Devices) is increasing in Photovoltaic Cells, Optical Luminescent Tracers, Forensic Chemistry, Fluoroimmunoassays, and more. Knowing the great demand for these devices, it is feasible to study and characterize new compounds that have favorable emission characteristics and that allow their use in the aforementioned categories. For this, the use of lanthanides is a great proposal, and the application of a chromophore ligand, such as Lapachol, aims to provide an increase in the emission of the final product. In the present work, the extraction, a new purification process of Lapachol from its natural source, the Ipê Roxo wood, is reported, as well as the characterizations that attest to the feasibility of the new process, in addition to the use of the material as a binder in lanthanide complexes.