Aboshyan-Sorgho, LilitBesnard, CélinePattison, PhilKittilstved, Kevin R.Aebischer, AnninaBünzli, Jean-Claude G.Hauser, AndreasPiguet, Claude2011-07-072011-07-072011-07-07201110.1002/anie.201100095https://infoscience.epfl.ch/handle/20.500.14299/69487WOS:000290662500010Giving the green light: 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. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.helical structureslanthanidesphotochemistryself-assemblyupconversionOptical Spectroscopy2-Photon AbsorptionEnergy-TransferLuminescenceTemperatureZebrafishPhotonSeries4F-4FTm3+Near-infrared→Visible light upconversion in a molecular trinuclear d-f-d complextext::journal::journal article::research article