A luminescence mediator: An unusual lanthanide complex, exploiting a dendrimer and a ruthenium(II) complex as ligands, collects ultraviolet and visible light and exhibits luminescence in the near infrared region (see picture, N Blue, Ru brown, O red, C gray). In the absence of the ruthenium component the dendrimer is unable to transfer energy to the NdIII ion, even though it is directly coordinated to it.
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Giansante et al. (2008) studied this question.
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