Compounds of europium(III) and ruthenium(II) are of interest for potential optical source applications in the red portion of the visible spectrum. Our previous work showed that the organo-europium complex tris(4,4,4-trifluoro-l-(2′-thienyl)-l,3-butanedionato-O, O′)europium( III), Eu(ttfa)3, demonstrated superior fluorescence properties to salts like europium(III) chloride when doped into sol-gel materials. The ruthenium complex tris(2,2′- bipyridyl)ruthenium(II) chloride, ‘Ru(bpy)3’Cl2, also shows strong fluorescence when doped into sol-gel materials.
Luminescence behavior of the ‘;Ru(bpy)3’Cl2 complex has been investigated as a function of matrix composition using three sol-gel-derived hosts: silica, an acrylate ORMOSIL, and an epoxide ORMOSIL. Luminescence characteristics have also been studied as a function of fluorophore concentration. Fluorescence lifetime, excitation and emission spectra, and quantum efficiency values have been determined.