Interaction of UO2 2+ with sodium dodecyl sulfate micelles: association of phenols to micelles through fluorescence quenching data.
Time-resolved laser-induced fluorescence (TRLIF) has been used to study the interaction of uranyl ion with sodium dodecyl sulfate (SDS) micelles in H(3)PO(4) 1 M. The titration curve consists of two curved regions with different slopes, one of them more pronounced at low concentration of SDS and the other, with a less pronounced positive slope at larger [SDS] until a plateau is reached. The fluorescence quenching of uranyl ion by para-substituted phenol compounds was studied by TRLIF and steady-state emission intensity measurements. The results were interpreted in terms of binding of phenolic compounds to the micelle. The binding constant (K(Q)) as well as the entrance and exit rate constants were determined for all the quenchers used.
Massad
Walter A
WA
INFIQC-Departamento de Físico-Química, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria-5000 Córdoba, Argentina.
Repossi
Patricia
P
Argüello
Gerardo A
GA
D008823:Micelles; D010636:Phenols; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D017974:Uranium Compounds / Q000737:chemistry*
D008823:Micelles; D010636:Phenols; D017974:Uranium Compounds; D012967:Sodium Dodecyl Sulfate; C047385:uranium oxide