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Synthesis and Optical Properties of a Novel Oligobipyridine

Published online by Cambridge University Press:  21 March 2011

Y. J. Fu ,
T.K.S. Wong ,
H.X. Zhang ,
G. M. Wang ,
X. Hu ,
Z.S. Gao  and
M.H. Jiang
Y. J. Fu
Affiliation:
Division of Microelectronics, School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore 639798
T.K.S. Wong
Affiliation:
Division of Microelectronics, School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore 639798
H.X. Zhang
Affiliation:
Division of Microelectronics, School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore 639798
G. M. Wang
Affiliation:
Division of Materials Technology, School of Material Engineering, Nanyang Technological University, Singapore 639798
X. Hu
Affiliation:
Division of Materials Technology, School of Material Engineering, Nanyang Technological University, Singapore 639798
Z.S. Gao
Affiliation:
State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P. R. CHINA
M.H. Jiang
Affiliation:
State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P. R. CHINA
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Abstract

In this paper, 5,5' –bis [ 4'– methyl- ( 2,2'– bipyridin– 4- yl)- ethyl ]- 2,2'– bipyridine (BMBPYBPY), a partially conjugated derivative of oligobipyridine, has been synthesized and found to show strong photoluminescence (PL). Compared with the pyridine-based conjugated polymers, the shortened conjugation length shifts the emission color from green to violet-blue. The effects of morphology on its PL properties have been studied. From its as-precipitated powder state, an emission peak at 418 nm can be observed. However the emission spectra from its diffused states such as doped in KBr, or dissolved in CHCl3, as well as from its amorphous film state fabricated by vacuum evaporation are more complex. Also carried out are preliminary electroluminescent studies. Single layer devices ITO/BMBPYBPY/Al do not emit although current can be observed prominently. Double layer devices ITO/TPD/ BMBPYBPY/Al show emissions both from TPD and BMBPYBPY.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 665: Symposium C – Electronic, Optical and Optoelectronic Polymers and Oligomers , 2001 , C8.31
Copyright
Copyright © Materials Research Society 2001

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References

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