物理化学学报 >> 2010, Vol. 26 >> Issue (04): 993-998.doi: 10.3866/PKU.WHXB20100403

光化学与光谱 上一篇    下一篇

螺二芴基可溶性共聚物的合成及发光性能

张诚, 徐宇, 徐意, 欧阳密, 马淳安   

  1. 浙江工业大学化学工程与材料学院, 绿色化学合成技术国家重点实验室培育基地, 杭州 310014
  • 收稿日期:2009-09-22 修回日期:2009-11-12 发布日期:2010-04-02
  • 通讯作者: 张诚 E-mail:czhang@zjut.edu.cn

Synthesis and Luminescence Properties of Soluble Spirobifluorene-Based Conjugated Polymers

ZHANG Cheng, XU Yu, XU Yi, OUYANG Mi, MA Chun-An   

  1. State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310014, P. R. China
  • Received:2009-09-22 Revised:2009-11-12 Published:2010-04-02
  • Contact: ZHANG Cheng E-mail:czhang@zjut.edu.cn

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摘要：

以9,9'-螺二芴和不同链长的二烷氧基苯为单体, 以FeCl3为催化剂, 采用化学氧化法合成了一系列聚合物发光材料. 溶解度测试表明, 共聚物在二氯甲烷、四氢呋喃(THF)、氯仿等极性溶剂中具有良好的溶解性. 利用核磁共振氢谱(1H NMR)、傅里叶变换红外(FT-IR)光谱、紫外-可见(UV-Vis)光谱和荧光(PL)光谱研究了共聚物的化学结构和发光性能, 结果表明共聚物在二甲基亚砜(DMSO)中均发射蓝色荧光, 最大吸收和荧光发射峰分别为356和413 nm. 以硫酸奎宁溶液作为参比, 测得共聚物的荧光量子效率为0.69至0.77. 通过循环伏安法(CV)测得所合成的三种共聚物的最高占有分子轨道(HOMO)能级均位于-5.85至-5.69 eV之间.

关键词: 光致发光, 共聚物, 螺二芴, 溶解性, 化学氧化法

Abstract:

Spirobifluorene (SPF)-based soluble copolymers containing different chain lengths of alkoxy-benzene units in the main chain were synthesized via a chemical oxidative method using FeCl3 as the catalyst. The copolymers are soluble in common organic solvents such as methylene chloride, tetrahydrofuran (THF), and chloroform. The chemical structure and luminescence properties of the as-prepared copolymers were investigated by Fourier transform infrared (FT-IR) spectroscopy, proton nuclear magnetic resonance spectroscopy (1HNMR), ultraviolet-visible (UV-Vis) spectroscopy, and photoluminescence (PL) spectroscopy. With dimethylsulfoxide (DMSO) as solvent, the copolymers emit a strong blue light. The absorption and PL emission peaks appear at 356 and 413 nm, respectively. Using quinine sulfate as the reference, the fluorescence quantum yields of the copolymers were found to be 0.69 and 0.77. Cyclic voltammetry (CV) tests indicated that the highest occupied molecular orbital (HOMO) energy levels of the copolymers are located between -5.85 and -5.69 eV.

Key words: Photoluminescence, Copolymer, Spirobifluorene, Solubility, Chemical oxidative method