A Highly Copper-Selective Ratiometric Fluorescent Sensor Based on BODIPY

Authors

  • Jinlong Huang,

    1. College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China
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  • Bo Wang,

    1. College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China
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  • Jianguo Ye,

    1. College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China
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  • Bin Liu,

    1. College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China
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  • Huayu Qiu,

    1. College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China
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  • Shouchun Yin

    Corresponding author
    1. College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China
    • College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, Zhejiang 310036, China, Tel.: 0086-571-28867899; Fax: 0086-571-28867899
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Abstract

A new ratiometric fluorescent sensor (1) for Cu2+ based on 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) with di(2-picolyl)amine (DPA) as ion recognition subunit has been synthesized and investigated in this work. The binding abilities of 1 towards different metal ions such as alkali and alkaline earth metal ions (Na+, K+, Mg2+, Ca2+) and other metal ions ( Ba2+, Zn2+, Cd2+, Fe2+, Fe3+, Pb2+, Ni2+, Co2+, Hg2+, Ag+) have been examined by UV-vis and fluorescence spectroscopies. 1 displays high selectivity for Cu2+ among all test metal ions and a ∼10-fold fluorescence enhancement in I582/I558 upon excitation at visible excitation wavelength. The binding mode of 1 and Cu2+ is a 1:1 stoichiometry determined via studies of Job plot, the nonlinear fitting of the fluorometric titration and ESI mass.

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