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Cyclometalated Platinum(II) Complexes with Mesoionic Dibenzofuranyl‐1,2,3‐triazol‐4‐ylidene Ligands: Synthesis, Characterization and Photophysical Properties
Author(s) -
Soellner Johannes,
Strassner Thomas
Publication year - 2019
Publication title -
chemphotochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.13
H-Index - 18
ISSN - 2367-0932
DOI - 10.1002/cptc.201900083
Subject(s) - mesoionic , cyclic voltammetry , phosphorescence , platinum , chemistry , carbene , photochemistry , luminescence , spectroscopy , materials science , electrochemistry , organic chemistry , catalysis , fluorescence , optoelectronics , optics , physics , electrode , quantum mechanics
Platinum(II) complexes with mesoionicC ∧ C *‐cyclometalating 1,2,3‐triazolylidene ligands are highly efficient phosphorescent emitters. Herein we report a series of this type bearing dibenzofuranyl‐substituted carbenes along with different β‐diketonate auxiliary ligands. They show luminescence in the green region of the visible spectrum and quantum yields of up to 78 % at room temperature. The proposed molecular structures were verified by NMR spectroscopy and X‐ray diffraction experiments which prove the formation of the mesoionic carbene. Additionally, DFT calculations and cyclic voltammetry measurements were used to rationalize the observed photophysical properties of the reported complexes.