Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (12): 1415-1424. Previous Articles     Next Articles

Full Papers

侧链取代的芴苯共聚物的光电性质及其溶剂化效应研究

刘天西*,1,2,杨贵忠2,韦春*,1   

  1. (1有色金属及材料加工新技术教育部重点实验室 桂林理工大学材料科学与工程学院 桂林541004)
    (2聚合物分子工程教育部重点实验室 复旦大学高分子科学系 上海200433)
  • 投稿日期:2011-01-25 修回日期:2011-02-15 发布日期:2011-02-25
  • 通讯作者: 刘天西 E-mail:txliu@fudan.edu.cn

Side Chain and Solvation Effects on the Photophysical Properties of Fluorene-alt-Benzene Based Conjugated Block Copolymers

Liu Tianxi*,1,2 Yang Guizhong2 Wei Chun*,1   

  1. (1 Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, Guilin University of Technology, Guilin 541004) (2 Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Fudan University, Shanghai 200433)
  • Received:2011-01-25 Revised:2011-02-15 Published:2011-02-25
  • Contact: Tianxi Liu E-mail:txliu@fudan.edu.cn

A series of hairy-rod fluorene-alt-benzene based conjugated polymers with different substituted groups on phenylene were synthesized through Suzuki coupling polymerization. The optical properties, fluorescence quantum yields (QY) and electrochemical properties of these polymers were investigated. It was found that the optical properties of the polymers did not show obvious dependence on the alkyl length on phenylene. However, the spectral stability was increased, and the 0-1 transition and the full width at the half-maximum (FWHM) of photoluminescence spectra were decreased with the increase of the alkoxy length on phenylene. The nature (e.g. electron-donating and electron-withdrawing) of the substituted side groups on phenylene has obvious effect on the optical properties, QY and electrochemical properties of the polymers. Thus, the photophysical properties of the polymers can be tuned by attaching different substituted side groups onto the phenylene. The spectra of the polymers in solutions exhibit dependence on dielectric constants of the solvents used, and the spectra of the polymer solutions shift to longer wavelength with increasing the dielectric constants of the solvents.

Key words: polyfluorene, block copolymer, side chain, photophysical property, solvation effect