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Synthesis of a new conjugated polymer based on benzimidazole and its sensory properties using the fluorescence-quenching effect

Authors

  • Ho Wook Choi,

    1. School of Chemical Engineering, Hanyang University, Haengdang-1-Dong, Seongdong-Ku, Seoul 133-791, Korea
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  • Youn Suk Kim,

    1. School of Chemical Engineering, Hanyang University, Haengdang-1-Dong, Seongdong-Ku, Seoul 133-791, Korea
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  • Nam Choul Yang,

    1. Samsung Advanced Institute of Technology, P.O. Box 111, Suwon 400–600, Korea
    Current affiliation:
    1. Samsung SDI LTD. 482-5, Gongse-Ri, Kiheung-Eup, Yongin-City, Gyeonggi-Do 449-902, Korea
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  • Dong Hack Suh

    Corresponding author
    1. School of Chemical Engineering, Hanyang University, Haengdang-1-Dong, Seongdong-Ku, Seoul 133-791, Korea
    • School of Chemical Engineering, Hanyang University, Haengdang-1-Dong, Seongdong-Ku, Seoul 133-791, Korea
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Abstract

A new anionic conjugated polymer containing a fluorene group in the main chain was designed and synthesized from poly(2,7-(9,9′-dihexylfluorene)-5,5′-bibenzimidazole) (PFBI). The polymer showed strong blue emission with high quantum efficiency (0.64) at 450 nm in MeOH and the dramatic quenching effect by Methyl Viologen (MV2+). The fluorescence-quenching effect results from the weak complex formation between an anionic polymer and electron acceptors such as bipyridinium derivatives. The linear Stern–Volmer constant (Ksv) was 3.7×105 M−1 for MV2+. The newly synthesized polymer is expected to show the applicability for biological and chemical sensors. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 900–904, 2004

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