Dimeric phenanthroimidazole for blue electroluminescent materials: the effect of substituted position attached to biphenyl center

文献情報

出版日 2014-03-07

DOI 10.1039/C4CP00209A

インパクトファクター 3.676

著者

Zhiming Wang, Ying Feng, Hui Li, Zhao Gao, Xiaojuan Zhang, Ping Lu, Ping Chen, Yuguang Ma, Shiyong Liu

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要旨

Two isomers of 4,4′-bis(1-phenyl-phenanthro[9,10-d]-imidazol-2-yl)biphenyl (BPPI), L-BPPI and Z-BPPI were prepared by tuning the substituted position on the biphenyl from para- to meta-coupling. Because of the conjugated degree change at the C2-position in the phenanthroimidazole block, the fluorescent color of L-BPPI (433 nm) and Z-BPPI (402 nm) showed an obvious blue-shift compared with that of BPPI (468 nm) in the films. Meanwhile, their non-doped devices exhibited more valuable and stable deep-blue emissions with a CIE coordinate of (0.16, 0.10) and (0.16, 0.11), respectively. Furthermore, some valuable information on structure–properties was obtained by density functional theory calculations, and photophysical and electrochemical characterization.

掲載誌

Physical Chemistry Chemical Physics

CiteScore: 5.5

自己引用率: 10.3%

年間論文数: 3036

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