Energy Transfer between <i>p</i>‐Benzoylbenzoate and Europium Ethylenediaminetetraacetate in Water Solution
作者:R. G. Charles、E. P. Riedel、P. G. Haverlack
DOI:10.1063/1.1726865
日期:1966.2.15
Ultraviolet radiation absorbed by the p-benzoylbenzoate (p-BB−) ion in solution is transferred to an appreciable extent to the europium ethylenediaminetetraacetate (EuEDTA−) ion and is re-emitted as the visible red fluorescence characteristic of Eu3+. Fluorescence intensity is greater in D2O than in water. The fluorescence is quenched by dissolved O2. Although evidence for mixed ligand complexes involving p-BB− and EuEDTA− was obtained, fluorescence seems to result from ultraviolet absorption by free p-BB− ions followed by intermolecular energy transfer to free EuEDTA− ions. The analogous water systems containing o-BB− or m-BB− are nonfluorescent, although all three of the solid hydrated salts Eu(o-BB)3, Eu(m-BB)3, and Eu(p-BB)3 fluoresce brightly at room temperature.