• Near-Infrared to Visible Light Upconversion in a Trinuclear d-f-d ComplexVery Important Paper
    L. Aboshyan-Sorgho, C. Besnard, P. Pattison, K.R. Kittilstved, A. Aebischer, J.-C.G. Bünzli, and C. Piguet
    Angewandte Chemie International Edition, 50 (2011), p4108-4112
    DOI:10.1002/anie.201100095 | unige:15714 | Abstract | Article PDF
  
The connection of two CrIII sensitizers around a central ErIII acceptor in a self-assembled cation provides high local metal concentrations that favor efficient nonlinear energy transfer upconversion luminescence (see picture). Upon selective low-energy near-infrared irradiation of CrIII-centered transitions, 1 displays an unprecedented molecular two-photon upconverted green ErIII-centered emission.



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