Synthesis and Photoluminescent Properties of Propeller-shaped Polyphenylenes Containing Hexaphenylbenzene Units

Chem. J. Chinese Universities

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Synthesis and Photoluminescent Properties of Propeller-shaped Polyphenylenes Containing Hexaphenylbenzene Units

CHENG Ge^*, ZHAO Ling, WANG Yue-Chuan

State Key Laboratory of Polymer Materials, College of Polymer Science & Engineering, Sichuan University, Chengdu 610065, China

Received:2008-02-19 Revised:1900-01-01 Online:2008-11-10 Published:2008-11-10
Contact: CHENG Ge

Abstract

Abstract:

A novel propeller-shaped polyphenylene(9), based on hexaphenylbenzene-graphite subunits and a core molecule, 1,3,5-tris(4-styrylphenyl)benzene(8), was synthesized by Heck coupling reaction of 4-(4-vinylphenylene) hexaphenylbenzene(7) with 1,3,5-tris(4-iodophenylbenzene)(4). The structure of molecule 9 was characterized by FTIR, ¹H NMR, ¹³C NMR, GPC, MALDI-TOF mass spectrum, and elemental analysis. The absorption and photoluminescence spectra of propeller-shaped molecule 9 were investigated. Compared with structurally related chromophoric units including 4-vinylbiphenyl, 1-[4-(4-vinylphenyl)phenyl]-2,3,4,5,6-pentaphenylbenzene 7 and 1,3,5-tris(4-styrylphenyl)benzene 8, the absorption peak of molecule 9 was red-shifted to 355 nm. This molecule exhibited two maximum emitting peaks at 397 nm and 445 nm in the range of blue luminescence with photoluminescence efficiency being 19%.

Key words: 4-Vinylbiphenyl, Hexaphenylbenzene, 1,3,5-Tris(4-styrylphenyl)benzene, Propeller-shaped molecule, Blue photoluminescence

CLC Number:

O621
O649

TrendMD:

CHENG Ge^*, ZHAO Ling, WANG Yue-Chuan. Synthesis and Photoluminescent Properties of Propeller-shaped Polyphenylenes Containing Hexaphenylbenzene Units[J]. Chem. J. Chinese Universities, doi: .

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Synthesis and Photoluminescent Properties of Propeller-shaped Polyphenylenes Containing Hexaphenylbenzene Units

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