具有C^C*环金属化NHC二苯并呋喃基配体的磷光铂（II）配合物：不同结合模式对激发态衰减时间的影响
Phosphorescent Platinum(II) Complexes with C^C* Cyclometalated NHC Dibenzofuranyl Ligands: Impact of Different Binding Modes on the Decay Time of the Excited State.
作者信息
Tronnier Alexander, Wagenblast Gerhard, Münster Ingo, Strassner Thomas
机构信息
Physikalische Organische Chemie, Technische Universität Dresden, 01069 Dresden (Germany).
BASF SE, 67056 Ludwigshafen (Germany).
出版信息
Chemistry. 2015 Sep 7;21(37):12881-4. doi: 10.1002/chem.201502087. Epub 2015 Jul 27.
Two C^C* cyclometalated platinum(II) N-heterocyclic carbene (NHC) complexes with the general formula [(C^C*)Pt(O^O)] (C^C*=1-dibenzofuranyl-3-methylbenzimidazolylidene; O^O=dimesitoylmethane) have been synthesized and extensively characterized, including solid-state structure determination, (195) Pt NMR 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.
合成了两种通式为[(C^C*)Pt(O^O)]的C^C环金属化铂(II) N-杂环卡宾（NHC）配合物（C^C = 1-二苯并呋喃基-3-甲基苯并咪唑亚基；O^O = 均三甲酰甲烷），并对其进行了广泛表征，包括固态结构测定、(195)Pt NMR光谱以及二维NMR（COSY、HSQC、HMBC、NOESY）光谱，以阐明其结构差异的影响。这两种区域异构体在NHC配体的二苯并呋喃基（DBF）部分与金属中心的结合方式上有所不同，这导致它们的物理化学性质发生显著变化，尤其是激发态的衰减时间。测量得到的量子产率超过80%，且发射颜色为蓝色。
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