3-Hydroxypyridin-2-one Complexes of Near-Infrared (NIR) Emitting Lanthanides: Sensitization of Holmium(III) and Praseodymium(III) in Aqueous Solution


  • This research and the Advanced Light Source are supported by the Director, Office of Science, Office of Basic Energy Sciences (OBES), and the OBES Division of Chemical Sciences, Geoscience and Bioscience of the U.S. Department of Energy under contract DE-AC02-05CH11231. Support from the NIH (Grant HL69832) and the ESPRC (academic fellowship for L.-O.P) is acknowledged.


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Ho ho ho! Characteristic visible and near-infrared (NIR) emission bands of the PrIII and HoIII complexes of the tetradentate 1-methyl-3-hydroxypyridin-2-one chromophore are observed in aqueous solution. The HoIII complex has been structurally characterized and, for the first time for a HoIII complex, the kinetics of the luminescence decay in the NIR region have been determined in solution.