Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (03): 325-334. Previous Articles     Next Articles

Full Papers



  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)
  • 收稿日期:2010-04-28 修回日期:2010-08-17 出版日期:2011-02-14 发布日期:2010-10-09
  • 通讯作者: 曹韵波
  • 基金资助:


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 Online:2011-02-14 Published:2010-10-09
  • Contact: Weiguo Zhu

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