Journal
ANALYTICAL CHEMISTRY
Volume 88, Issue 2, Pages 1238-1245Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.5b03593
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Funding
- National Natural Science Foundation of China [21435005, 21175124]
- Development Project of Science and Technology of Jilin Province [20150520011JH]
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Luminescent lanthanide ion complexes have received increasing attention because of their unique optical properties. Herein, we discovered that the luminescence of europium(III) (Eu3+) could be regulated by Ag+ and SCN- in seconds with enoxacin (ENX) as the antenna. Under given conditions, only the simultaneous introduction of Ag+ and SCN- could remarkably enhance the luminescence intensity of Eu3+-ENX complexes. This phenomenon has been exploited to design an AND logic gate and specific luminescence turn-on assays for sensitively sensing Ag+ and SCN- for the first time. Furthermore, the addition of S2- resulted in efficient luminescence quenching of the Eu3+/ENX/Ag+/SCN- system due to the strong affinity between Ag+ and S2-. Thus, a new luminescent sensing platform for S2- was established, which exhibited excellent selectivity and high sensitivity. S2- could be detected within the concentration range of 100 nM to 12.5 mu M with a detection limit of 60 nM. Such sensing system features simplicity, rapidity, and flexibility. Moreover, this proposed Eu3+-based luminescent assay could be successfully applied in the real environmental water sample analysis.
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