Spectroscopic Study of Cationic Carbocyanine Dye Binding to GdYVO4:Eu Nanoparticles

The interaction of the inorganic nanoparticles (GdYVO4:Eu, d = 2 nm) and organic carbocyanine dye 3,3’ -diethyloxa-carbocyanine iodide (DiOC2) has been studied spectrophotometrically. The formation of complexes of dye molecules with spherical nanoparticles GdYVO4:Eu in aqueous solutions of cationic dye DiOC2 was found. It is shown that nanoparticle GdYVO4:Eu can form a complex with 5-10 molecules of the cationic dye DiOC2 which leads to the decrease in the intensity of the absorption and luminescence spectra of the dye in aqueous solution.