Synthesis, structures and properties of new cyclometalated iridium(III) complexes of 3-methoxy-6-methyl-2-(naphthalen-2-yl)pyridine

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• 作者：Chen Xu^a ; ^{xubohan@163.com"" rel=""nofollow} ; Zhi-Qiang Wang^a ; Xin-Ming Dong^b ; Xin-Qi Hao^b ; Xue-Mei Zhao^b ; Bao-Ming Ji^a ; Mao-Ping Song^b ; ^{mpsong9350@zzu.edu.cn"" rel=""nofollow}
• 关键词：Iridium ; Cyclometalated ; Crystal structure ; Photoluminescence
• 刊名：Inorganica Chimica Acta
• 出版年：2011
• 出版时间：15 July 2011
• 年：2011
• 卷：373
• 期：1
• 页码：306-310
• 全文大小：546 K

文摘

The reaction between 3-methoxy-6-methyl-2-(naphthalen-2-yl)pyridine 1 and IrCl₃ was performed in an attempt to synthesize a cyclometalated Ir(III) Cl-bridged dimer 2. An unexpected Ir(III) complex 3 was isolated, which was a five-coordinate bis-cyclometalated Ir(III) complex. The complexes 2 and 3 were converted to the same mononuclear complex 4 upon reacting with acetylacetonate (acac), respectively. All of the new compounds have been fully characterized by elemental analysis, IR, ¹H, ¹³C{¹H} NMR and ESI-MS. Additionally, the crystal structures and properties of these Ir(III) complexes are investigated. The most striking common features of the structures of 2 and 3 is intramolecular C–H···Cl hydrogen bonds. The complex 4 shows yellow phosphorescence with structureless emission peaks at about 556 nm.