Functionalized Bis-Cyclometalated Alkynylgold(III) Complexes: Synthesis, Characterization, Electrochemistry, Photophysics, Photochemistry, and Electroluminescence Studies

详细信息    查看全文

• 作者：Vonika Ka-Man Au ; Daniel Ping-Kuen Tsang ; Keith Man-Chung Wong ; Mei-Yee Chan ; Nianyong Zhu ; Vivian Wing-Wah Yam
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：November 4, 2013
• 年：2013
• 卷：52
• 期：21
• 页码：12713-12725
• 全文大小：578K
• 年卷期：v.52,no.21(November 4, 2013)
• ISSN：1520-510X

文摘

A series of luminescent alkynylgold(III) complexes containing various tridentate bis-cyclometalating ligands derived from 2,6-diphenylpyridine (R-CNC), [Au(R-CNC)(C鈮鈥擟₆H₄鈥擱鈥?] has been successfully synthesized and characterized. Complexes 1 and 6 have been determined by X-ray crystallography. Electrochemical studies show a ligand-centered reduction that originated from the tridentate R-CNC pincer ligands and an alkynyl-centered oxidation. The photophysical properties of the complexes have been studied in detail by electronic absorption and emission studies. Tunable photoluminescence behaviors have been observed, with the emission maxima spanning through the visible region from 476 to 669 nm in dichloromethane at room temperature, and the complexes were also found to be emissive in various media at both room and low temperatures. Transient absorption studies have been conducted to investigate the excited state properties of the complexes. Furthermore, selected complexes have been incorporated into the emissive layer (EML) of organic light-emitting devices (OLEDs) and have demonstrated interesting electroluminescence.