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Blue-Phosphorescent Pt(II) Complexes of Tetradentate Pyridyl-Carbolinyl Ligands: Synthesis, Structure, Photophysics, and Electroluminescence.
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2020-09-20 , DOI: 10.1021/acs.inorgchem.0c02244 Feiling Yu 1 , Yongjian Sheng 1 , Dandan Wu 1 , Ke Qin 1 , Hongbo Li 2 , Guohua Xie 3 , Qin Xue 4 , Zhengyi Sun 1 , Zhenzhong Lu 1 , Huili Ma 1 , Xiao-Chun Hang 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2020-09-20 , DOI: 10.1021/acs.inorgchem.0c02244 Feiling Yu 1 , Yongjian Sheng 1 , Dandan Wu 1 , Ke Qin 1 , Hongbo Li 2 , Guohua Xie 3 , Qin Xue 4 , Zhengyi Sun 1 , Zhenzhong Lu 1 , Huili Ma 1 , Xiao-Chun Hang 1
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Blue phosphorescent tetradentate pyridyl–carbolinyl Pt(II) complexes, Pt(ppzOclpy-Me), Pt(ppzOclpy-iPr), and Pt(ppzOclpy-mesi), were purposefully synthesized and investigated with their photophysical and luminescent properties. The complexes, incorporating with carbolinyl moieties, have twisted planar structure. X-ray crystallography revealed that the intraligand N···H–C hydrogen bond reversely turned the twisty pyridyl moiety back into the chelating plane. Computational analyses confirmed that the metal-to-ligand charge-transfer transition character appears in the singlet manifolds. However, the ligand-centered transitions rule in their triplet states, which accounts for the phosphorescent emission. The Pt(II) complexes emit blue light with peak wavelengths (λmax) of 461–481 nm and moderate photoluminescent quantum yields (Φ = 34–46% in dichloromethane and Φ = 44–52% in films). The electroluminescent devices were fabricated by solution processes, giving blue emissions peaking at around 470 nm.
中文翻译：
四齿吡啶基-羧甲基配体的蓝磷Pt（II）配合物：合成，结构，光物理和电致发光。
故意合成了蓝色磷光四齿吡啶基-咔啉基Pt（II）配合物Pt（ppzOclpy-Me），Pt（ppzOclpy- i Pr）和Pt（ppzOclpy-mesi），并研究了它们的光物理性质和发光性质。与咔啉基部分结合的复合物具有扭曲的平面结构。X射线晶体学分析表明，配体中的N····H–C氢键使扭曲的吡啶基部分反向回到螯合平面。计算分析证实，金属到配体的电荷转移过渡特征出现在单重态歧管中。然而，以配体为中心的跃迁以其三重态存在，这解释了磷光发射。Pt（II）络合物发出峰值波长为（λmax）在461-481 nm之间，中等的光致发光量子产率（二氯甲烷中Φ= 34-46％，薄膜中Φ= 44-52％）。电致发光器件是通过溶液工艺制造的，蓝光发射在470 nm附近达到峰值。
更新日期：2020-10-05
中文翻译：
四齿吡啶基-羧甲基配体的蓝磷Pt（II）配合物：合成，结构，光物理和电致发光。
故意合成了蓝色磷光四齿吡啶基-咔啉基Pt（II）配合物Pt（ppzOclpy-Me），Pt（ppzOclpy- i Pr）和Pt（ppzOclpy-mesi），并研究了它们的光物理性质和发光性质。与咔啉基部分结合的复合物具有扭曲的平面结构。X射线晶体学分析表明，配体中的N····H–C氢键使扭曲的吡啶基部分反向回到螯合平面。计算分析证实，金属到配体的电荷转移过渡特征出现在单重态歧管中。然而，以配体为中心的跃迁以其三重态存在，这解释了磷光发射。Pt（II）络合物发出峰值波长为（λmax）在461-481 nm之间，中等的光致发光量子产率（二氯甲烷中Φ= 34-46％，薄膜中Φ= 44-52％）。电致发光器件是通过溶液工艺制造的，蓝光发射在470 nm附近达到峰值。
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