物理化学学报 >> 2003, Vol. 19 >> Issue (10): 889-891.doi: 10.3866/PKU.WHXB20031001

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一种新型吡嗪铱（Ⅲ）配合物的合成及其磷光性质

张国林;刘泽华;郭海清   

  1. 北京大学化学与分子工程学院,稀土材料化学及应用国家重点实验室,北京　100871
  • 收稿日期:2003-06-20 修回日期:2003-07-14 发布日期:2003-10-15
  • 通讯作者: 郭海清 E-mail:guohq@pku.edu.cn

Synthesis and Phosphorescence of a New Iridium (III) Pyrazine Complex

Zhang Guo-Lin;Liu Ze-Hua;Guo Hai-Qing   

  1. State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing　100871
  • Received:2003-06-20 Revised:2003-07-14 Published:2003-10-15
  • Contact: Guo Hai-Qing E-mail:guohq@pku.edu.cn

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摘要： 利用5-甲基-2,3-二苯基吡嗪（MDPP）和水合三氯化铱（IrCl3•H2O）,合成了一种新型吡嗪铱配合物Ir (MDPP)2 (acac).通过1H NMR、元素分析和质谱方法对配合物结构进行了表征,并研究了配合物的吸收光谱和光致发光光谱.结果表明,配合物Ir (MDPP)2(acac)在393和528 nm处存在单重态1MLCT（金属到配体的电荷跃迁）和三重态3MLCT的吸收;在588 nm 处有较强的金属配合物三重态的磷光发射,是一种绿色磷光材料.

关键词: 磷光材料, 重金属配合物, 三重态, 吡嗪铱（Ⅲ）配合物, 发光, 电荷转移

Abstract: The aim of this study is to explore new phosphorescent materials as highly efficient electroluminescent (EL) emitters in organic light emitting diodes (OLEDs).Iridium (III) complexes were selected as the target compounds for their strong spin orbit coupling that may result in high efficient electro-phosphorescence in OLED at room temperature. Thus, a new iridium pyrazine complex, Ir(MDPP)2(acac)(MDPP=5-methyl-2,3-diphenylpyrazine; acac= acetylacetone) was synthesized by reaction of 5-methyl-2,3-diphenylpyrazine with iridium trichloride hydrate. The procedure of synthesis is simple and easy control. The complex was characterized by elemental analysis, 1H NMR, and mass spectroscopy. The complex shows strong 1MLCT (singlet metal to ligand charge-transfer) and 3MLCT (triplet metal to ligand charge-transfer) absorption at 386 and 507 nm, respectively. The complex also gives rise to a strong photoluminescence at 549 nm at room temperature. These results suggest the complex to be a promising phosphorescent material.

Key words: Phosphorescent material, Heavy metal complex, Triplet, Iridium pyrazine complex, Photoluminescence, Charge transfer