Synthesis and Properties of Poly(spirobifluorene-co-2,8-dibenzothiophene-S,S-dioxide)s

doi:10.3724/SP.J.1095.2014.40175

Chinese Journal of Applied Chemistry

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Synthesis and Properties of Poly(spirobifluorene-co-2,8-dibenzothiophene-S,S-dioxide)s

YANG Junwei^1,2, WANG Shumeng^1,2, DING Junqiao^1*, WANG Lixiang^1*

(1.State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of
Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;
2.University of Chinese Academy of Sciences,Beijing 100049,China)

Received:2014-05-12 Revised:2014-06-18 Published:2014-09-04 Online:2014-09-04
Contact: Junqiao Ding

Abstract

Abstract: An electron-deficient moiety, namely dibenzothiophene-S,S-dioxide(SO), has been incorporated into the main chain of poly(spirobifluorene)s(PSFs) via its 2 and 8 positions to form a series of copolymers with different SO content(PSF-28SO-3, PSF-28SO-5, PSF-28SO-7 and PSF-28SO-10). Unlike the 3,7-linked analogue that mainly reveals a charge transfer(CT) emission from the electron-rich tetraoctyloxyfluorene side chain to the electron-deficient SO unit in the main chain, the resultant polymers PSF-28SO-3~PSF-28SO-10 show emissions not only from the local excited(LE) states but also from the CT ones due to the unique 2,8-linkage. Consequently, near-white emission is achieved for these copolymers. Among them, PSF-28SO-10 has the best device performance, giving a luminous efficiency of 0.58 cd/A and Commission Internationale de L′Eclairage(CIE) coordinates of (0.25,0.36).

Key words: polymer light-emitting diodes, charge transfer, poly(spirobifluorene)s, dibenzothiophene-S,S-dioxide

CLC Number:

O631

YANG Junwei1,2, WANG Shumeng1,2, DING Junqiao1*, WANG Lixiang1*. Synthesis and Properties of Poly(spirobifluorene-co-2,8-dibenzothiophene-S,S-dioxide)s[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.40175.

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Synthesis and Properties of Poly(spirobifluorene-co-2,8-dibenzothiophene-S,S-dioxide)s

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