Luminescence of a conjugated polymer containing europium (III) chelate

A europium (III) chelate has been incorporated in a conjugated polymer, poly-[2,2′-bipyridine-5,5′-diyl-(2,5-dihexyl-1,4-phenylene)]. From the absorbance and emission spectra measurement and using the Judd–Ofelt theory, an efficient energy transfer between the conjugated polymer and the europium (III) chelate has been confirmed. The luminescence lifetime of Eu3+ ion in the conjugated polymer is 0.352 ms and the emission cross section of this material is 3.11×10−21 cm2.