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Citation: YANG Junwei, WANG Shumeng, DING Junqiao, WANG Lixiang. Synthesis and Properties of Poly(spirobifluoreneco-2,8-dibenzothiophene-S,S-dioxide) s[J]. Chinese Journal of Applied Chemistry, ;2014, 31(10): 1156-1163. doi: 10.3724/SP.J.1095.2014.40175 shu

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

YANG Junwei ^a,b ,
WANG Shumeng ^a,b ,
DING Junqiao ^a,, ,
WANG Lixiang ^a,,

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

Corresponding author: DING Junqiao, WANG Lixiang,
Received Date: 12 May 2014
Available Online: 23 June 2014
Fund Project: 国家重点基础研究发展计划(973计划)(2009CB623601) (973计划)(2009CB623601)国家自然科学基金资助项目(21174144,51322308,91333205) (21174144,51322308,91333205)

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