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Acta Chimica Sinica >

2012 , Vol. 70 >Issue 08: 1028 - 1034

DOI: https://doi.org/10.6023/A1107134

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Synthesis and Photoelectric Property of Bis-Cyclometalated Iridium Complexes with 3-Acetyl Camphor as the Ancillary Ligand

  • Jia Juan ,
  • Luo Kaijun ,
  • Chen Yanfang ,
  • Zhao Baijing ,
  • Li Maowei
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  • College of Chemistry and Materials Science of Sichuan Normal University, Chengdu 610068

Received date: 2011-07-13

  Revised date: 2011-11-12

  Online published: 2011-12-25

Supported by

Project supported by the National Natural Science Foundation (Nos. 21072141, 21172161, 50973067, 51173115) of China.

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Abstract

A series of bis-cyclometalated iridium complexes, iridium(III) bis(2-(2,4-difluoro)phenylpyridine- N,C2') 3-acetyl camphor [(46dfppy)2Ir(acam)], iridium(III) bis(2-phenylpyridinato-N,C2') 3-acetyl camphor [(ppy)2Ir(acam)] and iridium(III) bis(2-(2'-benzothienyl) pyridinato-N,C3') 3-acetyl camphor [(btp)2Ir(acam)] were synthesized with sterically 3-acetyl camphor as ancillary ligand. The absorption spectrum, PL spectra and photoluminescence efficiency of complexes were compared with the corresponding complexes with acetylacetone (acac) as the ancillary ligand. It was found that all of their photoluminescence efficiency could be improved when sterically hindered 3-acetyl camphor was introduced. When [(ppy)2Ir(acam)] was used as light-emitting devices, the EL spectra has the largest peak intensity at 516 nm. The device has the greatest brightness of 10930 cd/m2 and maximum brightness efficiency of 14.6 cd/A at 12 V. The highest power effciency and brightness are 4.23 lm/W and 698 cd/m2 respectively at 10.7 V.

Key words： bis-cyclometalated iridium complexes; 3-acetyl camphor; quantum efficiency

Cite this article

Jia Juan , Luo Kaijun , Chen Yanfang , Zhao Baijing , Li Maowei . Synthesis and Photoelectric Property of Bis-Cyclometalated Iridium Complexes with 3-Acetyl Camphor as the Ancillary Ligand[J]. Acta Chimica Sinica, 2012 , 70(08) : 1028 -1034 . DOI: 10.6023/A1107134

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