Browsing by Subject "Carbenos"

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    Luminescent platinum(IV) complexes bearing cyclometalated 1,2,3-triazolylidene and bi- or terdentate 2,6-diarylpyridine ligands
    (Wiley, 2019-04-23) Vivancos Ureña, Ángela; Bautista, Delia; González Herrero, Pablo; Química Inorgánica
    The synthesis, structure, and photophysical properties of luminescent PtIV complexes that combine cyclometalated 1,2,3-triazolylidene and bi- or terdentate 2,6-diarylpyridine ligands are reported. The targeted complexes represent the first examples of PtIV species with a cyclometalated mesoionic aryl-NHC ligand. They exhibit moderate or weak emissions in fluid solution at 298 K arising from 3LC states, which become very intense in poly(methyl methacrylate) (PMMA) matrices at 298 K. DFT and TD-DFT calculations confirm that the chromophoric ligand is the cyclometalated 2,6-diarylpyridine and show that the aryl-NHC ligand exerts a beneficial effect on the emission efficiencies of these derivatives by increasing the energy of deactivating LMCT excited states with respect to comparable PtIV complexes with cyclometalated 2-arylpyridine ligands.