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An NBD-based Sensitive and Selective Fluorescent Sensor for Copper(II) Ion

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Abstract

A new 7-nitrobenz-2-oxa-1,3-diazole (NBD) derived fluorescent probe (1) exhibiting high selectivity for Cu2+ detection, produced significant fluorescence quenching in the presence of Cu2+ ion, while the metal ions Ca2+, Cd2+, Co2+, Fe2+, Hg2+, Mg2+, Mn2+, Ni2+ and Zn2+ produced only minor changes in fluorescence. The apparent association constant (K a) for Cu2+ binding in chemosensor 1 was found to be 1.22 × 103 M−1. The maximum fluorescence quenching activity caused by Cu2+ binding to 1 was observed over the pH range 6–10.

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Acknowledgements

We gratefully acknowledge the financial supports of the National Science Council (ROC) and National Chiao Tung University.

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Authors and Affiliations

  1. Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan, 300, Republic of China

    Shi-Rong Liu & Shu-Pao Wu

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  1. Shi-Rong Liu
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  2. Shu-Pao Wu
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Correspondence to Shu-Pao Wu.

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Liu, SR., Wu, SP. An NBD-based Sensitive and Selective Fluorescent Sensor for Copper(II) Ion. J Fluoresc 21, 1599–1605 (2011). https://doi.org/10.1007/s10895-011-0848-9

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