Vyacheslav Diev - Efficient Dipyrrin-Centered Phosphorescence at Room Temperature from Bis-Cyclometalated Iridium(III) Dipyrrinato Complexes

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      Publication Details (including relevant citation   information):

      Inorg.   Chem. 2010,   49, 6077-6084

      Abstract:

      A series of seven dipyrrin-based bis-cyclometalated Ir(III)   complexes have been synthesized and characterized. All complexes   display a single, irreversible oxidation wave and at least one   reversible reduction wave. The electrochemical properties were   found to be dominated by dipyrrin centered processes. The   complexes were found to display room temperature luminescence   with emission maxima ranging from 658 to 685 nm. Through   systematic variation of the cyclometalating ligand and the meso   substituent of the dipyrrin moiety, it was found that the   observed room temperature emission was due to phosphorescence   from a dipyrrin-centered triplet state with quantum efficiencies   up to 11.5%. Bis-cyclometalated Ir(III) dipyrrin based organic   light emitting diodes (OLEDs) display emission at 682 nm with   maximum external quantum efficiencies up to 1.0%.

      Address (URL): http://pubs.acs.org/doi/abs/10.1021/ic100633w