title: Enhancement of europium luminescence in tetracycline-europium complexes in the presence of urea hydrogen peroxide.
abstract: An increase in the europium emission band was observed, for the first time, with addition of urea hydrogen peroxide to the tetracycline-europium (Tc-Eu)solution. We have observed that the wavelength, the band width and the area of 5D0-->7F2 europium transition change with the urea hydrogen peroxide concentration. We claim that the tetracycline-europium complexes can be used as probes of urea hydrogen peroxide concentration.
authors.affiliation: Faculdade de Tecnologia de São Paulo, Departamento de Ensino Geral, Praça Coronel Fernando Prestes, 30 - Bom Retiro, São Paulo, CEP, 01124-060, SP-Brazil.
authors.forename: Flávia Rodrigues
authors.initials: FR
authors.lastname: da Silva
authors.forename: Lilia Coronato
authors.initials: LC
authors.lastname: Courrol
authors.forename: Luis Vicente Gomes
authors.initials: LV
authors.lastname: Tarelho
authors.forename: Laércio
authors.initials: L
authors.lastname: Gomes
authors.forename: Nilson Dias Vieira
authors.initials: ND
authors.lastname: Júnior