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Cleanly separated by two photons: The design and photophysical characterization of a new highly stable macrocyclic ytterbium complex featuring a two-photon antenna ligand is described (see picture). The biphotonic sensitization of the near-infrared ytterbium(III) luminescence and the conception of an unconventional near-infrared biphotonic microscope allow performing in-depth imaging of thick tissues.
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D’Aléo et al. (2012) studied this question.
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