A colorimetric and ratiometric fluorescent probe for sulfite based on an intramolecular cleavage mechanism

Authors

  • Peng Hou,

    1. College of Chemistry & Chemical Engineering, Central South University
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  • Song Chen,

    1. College of Chemistry & Chemical Engineering, Central South University
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  • Kislon Voitchovsky,

    1. College of Chemistry & Chemical Engineering, Central South University
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  • Xiangzhi Song

    Corresponding author
    1. College of Chemistry & Chemical Engineering, Central South University
    2. Key Laboratory of Resource Chemistry of Nonferrous Metals, Ministry of Education
    3. State Key Laboratory for Powder Metallurgy, Changsha, Hunan Province, People's Republic of China
    • Correspondence to: Xiangzhi Song, College of Chemistry & Chemical Engineering, Central South University, 932 Lushan South Road, Changsha, Hunan Province, People's Republic of China, 410083. E-mail: xzsong@csu.edu.cn

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ABSTRACT

A colorimetric and ratiometric fluorescent sulfite probe, the levulinate of 4-hydroxynaphthalimide, was successfully synthesized from 4-hydroxy-naphthalimide and levulinic acid. Through sulfite-mediated intramolecular cleavage, the probe was converted into 4-hydroxynaphthalimide, which when excited at 450 nm, displayed a large Stokes shift due to the intramolecular charge transfer process. The probe exhibited high selectivity and sensitivity towards sulfite over other typical anionic species (F, Cl, Br, I, HPO42–, SO42–, NO3, AcO, ClO4, HCO3) in HEPES-buffered solution (25 mm, pH 7.4, 50% acetonitrile, v/v). Copyright © 2013 John Wiley & Sons, Ltd.

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