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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (03): 325-334. 上一篇    下一篇

研究论文

D-A型环金属铱(III)配合物磷光材料的合成及其光电性能的研究

曹韵波1，刘煜*,1,2，李亮1，梁爱辉1，谭华1，李小双1，倪美君1，刘明1，魏启亮1，朱卫国*,1,2   

  1. (1湘潭大学环境友好化学与应用教育部重点实验室 湘潭 411105)
    (2湘潭大学化学学院 湘潭 411105)
  • 投稿日期:2010-04-28 修回日期:2010-08-17 发布日期:2010-10-09
  • 通讯作者: 曹韵波 E-mail:zhuwg18@126.com
  • 基金资助:

    国家自然科学基金项目;湖南省科技厅科技计划项目

Synthesis, Photoelectronic Properties of the Cyclometalated Iridium(III) Complexes with Donor-Acceptor Structures

Cao Yunbo1 Liu Yu*,1,2 Li Liang1 Liang Aihui1 Tan Hua1 Li Xiaoshuang1 Ni Meijun1 Liu Ming1 Wei Qiliang1 Zhu Weiguo*,1,2   

  1. (1 Key Laboratory of Environment-Friendly Chemistry and Applications, Ministry of Education, Xiangtan 411105)
    (2 College of Chemistry, Xiangtan University, Xiangtan 411105)
  • Received:2010-04-28 Revised:2010-08-17 Published:2010-10-09
  • Contact: Weiguo Zhu E-mail:zhuwg18@126.com

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被引次数

4

为获得非共轭连接的供体(D)与受体(A)结构对环金属配合物的光电性能影响的关系, 设计合成了一类新型的基于咔唑和噁二唑功能基的D-A型环金属铱配合物, 并研究了这类材料的光电性能. 研究结果显示: 这类磷光材料与母体化合物二[2-(4 ,6 -二氟苯基)吡啶-C2,N ](吡啶-2-甲酸)合铱(III) [(dfppy)2Ir(pic)]相比, 具有更好的热稳定性、更强的红移紫外吸收峰、更高的荧光量子效率以及改善的电化学和电致发光性能. 它们在CH2Cl2中的最大紫外吸收波长为297 nm, 最大发光波长为476 nm|在固态下的最大发光波长红移至(526±6) nm|其中环金属铱配合物(t-Bu-OXDdfppy)2Ir(pic-Cz)在聚合物发光器件中的发光效率为2.5 cd/A, 远远高于(dfppy)2Ir(pic)器件的发光效率.

关键词: 环金属铱配合物, D-A型, 合成, 光电性能, 聚合物电致发光器件

To obtain the rule of influence of donor(D)-acceptor(A) structures attached into iridium complexes by a non-conjugated connection on the optoelectronic properties of their iridium complexes, a series of cyclometalated iridium(III) complexes with D-A structures containing carbazole and oxadiazole units were synthesized, and their optoelectronic properties were also investigated. The results show that these D-A based iridium complexes exhibited better thermal stability, more intense red-shifted UV absorption peak, higher emission quantum yield, as well as improved electrochemical and electroluminescence properties, compared with the classical di[2-(4 ,6 -diflurophenyl) pyridine-C2,N ](piconilic acid) iridium(III). Their maximum UV absorption and emission peaks located respectively at around 297 nm and 476 nm in dichloromethane, but the maximum emission peak shifted to (520±6) nm in their neat films. In these iridium complexes, (t-Bu-OXDdfppy)2Ir(pic-Cz) presented a current efficiency of 2.5 cd/A in its doped polymer light-emitting devices, which is higher than that of the (dfppy)2Ir(pic) doped device with the same device configuration.

Key words: cyclometalated iridium complex, donor-acceptor, synthesis, photoelectronic property, polymer light-emitting device