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Playing with Light and Color Assemblies of blue-green iridium and red europium complexes undergo energy transfer and emit white lightComplexes of the rare earth element (lanthanide) europium have the ability to emit red light over a longer time span after excitation by, for example, light of a suitable wavelength or the energy of a prior redox reaction. This luminescence makes them interesting candidates for applications in biological test systems or as sensors.
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