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Fluorescence Quenching of the Europium Tetracycline Hydrogen Peroxide Complex by Copper (II) and Other Metal Ions

Cano-Raya, Carla ; Fernández Ramos, Maria D. ; Capitán Vallvey, Luis F. ; Wolfbeis, Otto S. ; Schäferling, Michael


The europium–tetracycline complex [Eu(Tc)] is known to show only weak fluorescence with an emission maximum at 615 nm. On addition of hydrogen peroxide (HP), the strongly fluorescent [Eu(Tc)(HP)] complex is formed, which displays a 15-fold stronger luminescence intensity. This study describes the decrease in luminescence intensity of the [Eu(Tc)(HP)] complex in aqueous solution in the presence of ...


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