Synthesis, Photophysics, and Electroluminescence of Mesogen-Jacketed 2D Conjugated Copolymers Based on Fluorene−Thiophene−Oxadiazole Derivative
Synthesis, Photophysics, and Electroluminescence of Mesogen-Jacketed 2D Conjugated Copolymers Based on Fluorene−Thiophene−Oxadiazole Derivative
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DOI：
10.1021/ma802414s
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发表时间：
2009-01
期刊：
影响因子：
5.5
通讯作者：
Qian Yang;Hao Jin;Yiding Xu;Ping Wang;Xiaochao Liang;Zhihao Shen;Xiaofang Chen;Dechun Zou;Xinghe Fan;Qifeng Zhou
中科院分区：
文献类型：
--
作者：
Qian Yang;Hao Jin;Yiding Xu;Ping Wang;Xiaochao Liang;Zhihao Shen;Xiaofang Chen;Dechun Zou;Xinghe Fan;Qifeng Zhou
以新型单体3-{2，5-双[（4-十六烷氧基苯基）-1，3，4-恶二唑]苯基}-2，5-二溴噻吩（MJTO）与9，9 ′-二辛基芴通过Suzuki偶联反应合成了一系列新型共轭共聚物（PFT 0. 1、PFT 0. 5、PFT 1、PFT 5、PFT 10、PFT 25和PFT 50）。通过分子量测定、1H NMR、元素分析、TGA、DSC、UV-维斯吸收、发射光谱和循环伏安法对其进行表征。共聚物表现出高达417 °C的高分解温度和高达145 °C的高Tg值。MJTO单体的含量对材料的物理性能有很大的影响。当MJTO含量低于10.79%时，PFT 25和PFT 50在溶液和薄膜状态下均出现两个明显的吸收峰，分别对应于电子传输侧链和空穴传输主链的吸收，而不是单一的吸收峰。当MJTO含量低于10.79%时，共聚物的发射光谱基本一致，而PFT含量低于10.79%时，共聚物的发射光谱基本一致。
A novel monomer 3-{2,5-bis[(4-hexadecyloxy-phenyl)-1,3,4-oxadiazole]phenyl}-2,5-dibromothiophene (MJTO) was copolymerized with 9,9′-dioctylfluorene to generate a series of new conjugated copolymers (PFT0.1, PFT0.5, PFT1, PFT5, PFT10, PFT25, and PFT50) by Suzuki coupling reaction. They were characterized by molecular weight determination, 1H NMR, elemental analysis, TGA, DSC, UV−vis absorption, emission spectroscopy, and cyclic voltammetry. The copolymers exhibited high decomposition temperatures reaching 417 °C and high Tg values reaching 145 °C. The photophysical properties were greatly influenced by the content of the MJTO monomer. The copolymers in solution and film states of PFT25 and PFT50 showed two distinct absorption peaks corrresponding to absorptions from the electron-transport side chain and the hole-transport backbone, respectively, instead of a single peak when MJTO content was below 10.79%. The copolymers in solution with MJTO content below 10.79% shared similar emission spectra, whereas PFT...