Luminescence of Europium in Complex Systems with Benzoic Acid Sensitized by Terbium

A series of the mixed solid complexes of europium terbim benzoate and europium terbium lanthanum benzoate were synthesized.Their fluorescence spectra have been investigated.The results showed that the fluorescence emission of europium ions were greatly sensitized by terbium ions and those of terbium ions were strongly quenched by europium ions.The sensitization of Tb 3+ to the fluorescence emission of Eu 3+ can be enhanced and the quenching effect of Eu 3+ to that of Tb 3+ can be weakened by La 3+ .But the peak positions of their emission spectra basically keep unchanged.