期刊
ANALYTICA CHIMICA ACTA
卷 912, 期 -, 页码 139-145出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2016.01.044
关键词
Lanthanide coordination polymers; Tb-CIP/AMP; Hg2+; Drinking water; Human urine
资金
- National Natural Science Foundation of China [21405103, 21305085, U1404215, 21405001, 21475085, 21475084]
- Foundation for Key Scientific and Technological Project of Henan Province [142102210583]
- Innovation Scientists and Technicians Troop Construction Projects of Henan Province [2012TRTSTHN018]
Lanthanide coordination polymers (LCPs) have recently emerged as attractive biosensor materials due to their flexible components, high tailorable properties and unique luminescence features. In this work, we designed a smart LCP probe of Tb-CIP/AMP {(CIP, ciprofloxacin) (AMP, adenosine monophosphate)} for Hg2+ detection by using lanthanide ions as metal nodes, CIP as ligand molecule, and AMP as bridging linker and recognition unit. Tb-CIP/AMP emits strong green luminescence due to the inclusion of AMP, which withdraws the coordinated water molecules and shields Tb3+ from the quenching effect of O-H vibration in water molecules. The subsequent addition of Hg2+ into Tb-CIP/AMP can strongly quench the fluorescence because of the specific coordination interaction between AMP and Hg2+. As a kind of Hg2+ nanosensor, the probe exhibited excellent selectivity for Hg2+ and high sensitivity with detection limit of 0.16 nM. In addition, the probe has long fluorescence lifetime up to millisecond and has been applied to detect Hg2+ in drinking water and human urine samples with satisfactory results. We envision that our strategy, in the future, could be extended to the designation of other LCP-based hypersensitive time-gated luminescence assays in biological media and biomedical imaging. (C) 2016 Elsevier B.V. All rights reserved.
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