Phosphorescent Platinum(II) Complexes with C boolean AND C* Cyclometalated NHC Dibenzofuranyl Ligands: Impact of Different Binding Modes on the Decay Time of the Excited State

作者：Tronnier Alexander; Wagenblast Gerhard; Muenster Ingo; Strassner Thomas^*

来源：Chemistry - A European Journal, 2015, 21(37): 12881-12884.

DOI：10.1002/chem.201502087

• carbene complexes
• density functional calculations
• ligand design
• photophysics
• X-ray diffraction

Two C boolean AND C* cyclometalated platinum(II) N-heterocyclic carbene (NHC) complexes with the general formula [(C boolean AND C*)Pt(O boolean AND O)] (C boolean AND C*=1-dibenzofuranyl-3-methylbenzimidazolylidene; O<^>O=dimesitoylmethane) have been synthesized and extensively characterized, including solid-state structure determination, (PtNMR)-Pt-195 spectroscopy, and 2D NMR (COSY, HSQC, HMBC, NOESY) spectroscopy to elucidate the impact of their structural differences. The two regioisomers differ in the way the dibenzofuranyl (DBF) moiety of the NHC ligand is bound to the metal center, which induces significant changes in their physicochemical properties, especially on the decay time of the excited state. Quantum yields of over 80% and blue emission colors were measured.

• 出版日期2015-9-7