284034-77-1Relevant academic research and scientific papers
Near-infrared photoluminescence of lanthanide complexes containing the hemicyanine chromophore
Van Deun, Rik,Nockemann, Peter,Parac-Vogt, Tatjana N.,Van Hecke, Kristof,Van Meervelt, Luc,G?rller-Walrand, Christiane,Binnemans, Koen
, p. 5441 - 5447 (2007)
The near-infrared luminescence properties of three (E)-N-hexadecyl-N′,N′-dimethylamino-stilbazolium tetrakis(1-phenyl-3-methyl-4-benzoyl-5-pyrazolonato) lanthanide(III) complexes are described. These three complexes, containing trivalent neodymium, erbium and ytterbium, respectively, show near-infrared luminescence in acetonitrile solution upon UV irradiation. Luminescence decay times have been measured. The complexes consist of a positively charged hemicyanine chromophore with a long alkyl chain and a tetrakis(pyrazolonato) lanthanide(III) anion. Because of the absence of an α-hydrogen atom in the pyrazolonato ligands, and because of the saturation of the coordination sphere by four bidentate ligands, the luminescence properties are enhanced when compared to, e.g. quinolinate complexes.
