Influence of some selected organic molecules on intensity of luminescence of TiO2:Eu3+ electrodes

Eu3+ ions are anchored on TiO2 matrix by coupling with 2,2′-bipyridyl 4,4′-dicarboxylic acid. Five different luminescence centers are observed for TiO2|2,2′-bipyridyl 4,4′-dicarboxylic acid|Eu3+ electrodes due to electron transitions between d and f orbitals. Photo-luminescence of TiO2|2,2′-bipyridyl 4,4′-dicarboxylic acid|Eu3+ electrodes is increased by attaching 2-thenoyltrifluoroacetone to Eu3+ ions. Immersion of TiO2|2,2′-bipyridyl 4,4′-dicarboxylic acid|Eu3+|2-thenoyltrifluoroacetone electrodes in propylsulfide is found to be further increased intensities of luminescence bands by a factor of three.