Abstract
Based on the photoinduced electron transfer (PET) principle, 4-amino-7-nitro-2,1,3-benzoxadiazole (ANBD) has been used as a fluorophore to develop a new fluorescent probe, 4-(2-N,N-dimethylthioacetamide)amino-7-nitro-2,1,3-benzoxadiazole (2), for the detection of Hg2+. Upon the addition of Hg2+, a 46-fold fluorescence enhancement occurs. Moreover the probe 2 exhibits a high selectivity and sensitivity to Hg2+, even in the presence of other common metal ions. Under optimal reaction conditions, a good linearity can be obtained in the range of 0.5–2.5 μM, and the detection limit is 0.05 μM. In addition, the desulfurization reaction mechanism is proposed based on electrospray ionization mass spectrum. The present study is not only a supplement to the detection method of Hg2+, but also a merit to the development of ANBD-based fluorescent probes.
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We gratefully acknowledge the financial support from the Natural Science Foundation of Hebei Province, China (No. B2013106116).
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Wang, K., Mao, X., Cao, L. et al. A new 4-Amino-7-Nitro-2,1,3-Benzoxadiazole (ANBD)-Based Fluorescent Probe for the Detection of Hg2+ . J Fluoresc 27, 1739–1745 (2017). https://doi.org/10.1007/s10895-017-2112-4
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DOI: https://doi.org/10.1007/s10895-017-2112-4