P1.3.5 Europium(III) ion detection in water by a new luminescent optical fibre sensor

F. J. Sainz-Gonzalo, J. F. Fernández-Sánchez, A. Fernández-Gutiérrez, M. Casimiro, C. Popovici, I. Fernández, F. L. Ortiz, C. Elosúa, F. J. Arregui & I. R. Matías
A new europium(III) luminescent optical fibre sensor based on a tridentate bis(phosphinic amide)-phosphine oxide PhPO(C6H4POPhN(CH(CH3)2)2)2 is described. The ligand was successfully immobilized on PVC membrane on optical fibre by dip coating technique. The reaction between europium(III) ion and ligand produced a strong luminescent complex of stoichiometry, which possessed a maximum emission peak at 612 nm. The sensor luminescence response showed an exponential behavior versus logarithmic concentration of europium(III) ions (10^-8 - 10^-3 M) in aqueous...