期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 204, 期 -, 页码 105-112出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2018.06.033
关键词
Naphthalic anhydride conjugate; Turn-on fluorescent sensor; Al3+; Live cell imaging
类别
资金
- DST-SERB National postdoctoral fellowship [PDF2016/000804]
In this communication, we have developed an optical chemosensor 2-amino N-(6-bromo-1,3-dioxo-1H-benzo[de]isoquinolin-2(3H)-yl)benzamide (NAPH) for selective detection of Al3+ by reacting 4-bromo-1,8-naphthalic anhydride with 2-aminobenzohydrazide. In (DMSO:H2O, 1:1, v/v) medium, the selective and specific nature of NAPH towards Al3+ was observed by the quenching along with a blue-shift in the absorption of NAPH at 465 nm that resulted in the distinct colour change from light brown to colourless. The selective complexation that occurred between NAPH and Al3+ was investigated by H-1 NMR and DFT methods. Under similar conditions, the weakly fluorescent receptor NAPH showed a distinct fluorescence enhancement at 555 nm in the presence of Al3+ among the other tested metal ions and anions. The NAPH center dot Al3+ complex formation is reversible upon addition of strong chelating agent EDTA. The receptor NAPH can be applied to detect Al3+ down to 2.9 mu M without any interference from other tested metal ions. In addition, the receptor NAPH was successfully applied to detect Al3+ in live HeLa cells. (C) 2018 Elsevier B.V. All rights reserved.
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