Luminescent Tungsten(VI) Complexes: Photophysics and Applicability to Organic Light-Emitting Diodes and Photocatalysis

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• 作者：Dr. Kwan-Ting Yeung ; Dr. Wai-Pong To ; Chenyue Sun ; Dr. Gang Cheng ; Prof. Dr. Chensheng Ma ; Dr. Glenna So Ming Tong ; Chen Yang and Prof. Dr. Chi-Ming Che
• 刊名：Angewandte Chemie
• 出版年：2017
• 出版时间：January 2, 2017
• 年：2017
• 卷：129
• 期：1
• 页码：139-143
• 全文大小：2287K
• ISSN：1521-3757

文摘

The synthesis, excited-state dynamics, and applications of two series of air-stable luminescent tungsten(VI) complexes are described. These tungsten(VI) complexes show phosphorescence in the solid state and in solutions with emission quantum yields up to 22 % in thin film (5 % in mCP) at room temperature. Complex 2 c, containing a 5,7-diphenyl-8-hydroxyquinolinate ligand, displays prompt fluorescence (blue–green) and phosphorescence (red) of comparable intensity, which could be used for ratiometric luminescent sensing. Solution-processed organic light-emitting diodes (OLEDs) based on 1 d showed a stable yellow emission with an external quantum efficiency (EQE) and luminance up to 4.79 % and 1400 cd m⁻² respectively. These tungsten(VI) complexes were also applied in light-induced aerobic oxidation reactions.