Issue 22, 2014

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

Abstract

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
15 Jan 2014
Accepted
06 Mar 2014
First published
07 Mar 2014

Phys. Chem. Chem. Phys., 2014,16, 10837-10843

Author version available

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

Z. Wang, Y. Feng, H. Li, Z. Gao, X. Zhang, P. Lu, P. Chen, Y. Ma and S. Liu, Phys. Chem. Chem. Phys., 2014, 16, 10837 DOI: 10.1039/C4CP00209A

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