螺芴/2,8-S,S-二氧-二苯并噻吩共聚物的合成与性能

doi:10.3724/SP.J.1095.2014.40175

摘要/Abstract

摘要： 将缺电子单元—S,S-二氧-二苯并噻吩(SO)以2,8位引入到聚螺芴(PSFs)的主链，通过Suzuki聚合得到一系列具有不同SO含量的共聚物PSF-28SO-3、PSF-28SO-5、PSF-28SO-7和PSF-28SO-10。不同于3,7位连接，该系列2,8-位连接的共聚物既有来自于高分子主链的本征态(LE:local excited)发光，又有来自于从四烷氧基芴侧链到主链中SO单元的电荷转移(CT:charge transfer)发光，最终表现为近白光发射。其中，PSF-28SO-10具有最优器件性能，发光效率为0.58 cd/A，色坐标为（0.25,0.36）。

关键词: 高分子发光二极管, 电荷转移, 聚螺芴, S,S-二氧-二苯并噻吩

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

中图分类号:

O631

杨君维, 王淑萌, 丁军桥, 王利祥. 螺芴/2,8-S,S-二氧-二苯并噻吩共聚物的合成与性能[J]. 应用化学, DOI: 10.3724/SP.J.1095.2014.40175.

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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