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Star-shaped polymer PFStODO by atom transfer radical polymerization: Its synthesis, characterization, and fluorescence property

Authors

  • Pei-Yang Gu,

    1. Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China
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  • Cai-Jian Lu,

    1. Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China
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  • Qing-Feng Xu,

    Corresponding author
    1. Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China
    • Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China
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  • Gao-Jie Ye,

    1. Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China
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  • Wei-Qiang Chen,

    1. Laboratory of Organic NanoPhotonics and Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No.2, Beiyitiao, Zhongguancun Road, Haidian District, Beijing 100190, China
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  • Xuan-Ming Duan,

    1. Laboratory of Organic NanoPhotonics and Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, No.2, Beiyitiao, Zhongguancun Road, Haidian District, Beijing 100190, China
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  • Li-Hua Wang,

    1. Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China
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  • Jian-Mei Lu

    Corresponding author
    1. Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China
    • Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China
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Abstract

A novel monomer bearing with pyrazoline chromophore, 3-(4-fluorophenyl)-1-phenyl-5-(4-(4-vinylbenzyloxy)phenyl-4,5-dihydro-1H-pyrazole (FStODO), was synthesized, and its atom transfer radical polymerization initiated by a tetrafunctional initiator, pentaerythritol tetrakis(2-bromoisobutyrate) (4Bri-Bu), was studied in detail and characterized by 1H NMR, GPC, and TG-DSC. The solution, film luminescence of monomer, and its polymer were studied in detail. Compared with that of monomer, both luminescence emission intensity and quantum yield of star-shaped polymer PFStODO in DMF solution are decreased. However, the two-photon absorption (TPA) spectra in DMF solution measured by a femtosecond laser show an entirely different result that the maxima TPA cross-section value of polymer reaches to 203 GM, better than that of the monomer itself (13 GM). More interestingly, the film of polymer shows surprisingly white emission ranging from 400 to 700 nm assigned to the excimer formation. We attribute this formation of excimers to the ordered chromophore aggregates in film, which is further verified by X-ray diffraction. © 2011 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2011

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