Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 1201, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.molstruc.2019.127155
Keywords
Aluminum ion; Fluorescence chemosensor; Acylhydrazone; Disturbance
Categories
Funding
- National Students Innovation and Entrepreneurship Training Program [201810619032]
- National Natural Science Foundation of China [21501143]
- Open Project of State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials [11zxfk26, 15zxfk03]
- Longshan academic talent research supporting program of SWUST [17LZX677, 18LZXT02]
- PhD Fund of SWUST [13zx7104]
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As Al3+ is detrimental both to human and other organisms, a simple sensor, acylhydrazone AhzF, is synthesized in one step and its structure is confirmed by single crystal X-ray diffraction. AhzF shows specific fluorescence turn-on response for Al3+ over other metal ions at UV 365 nm, observed by naked-eyes. Its detection limit can reach to 1.11 x 10(-9) M in ethanol. Meanwhile, AhzF at low concentration can detect Al3+ with excellent interference resistance to typical disturbing metal ions including Cu2+ and Fe3+. For the first time, concentration influence of Fe3+ during AhzF detecting Al3+ has been explored and it has been found that the fluorescence of AhzF-Al3+ is partly quenched by Fe3+ while with no influence by Cu2+ at high concentration (above 10(-6) M), indicating its good low concentration advantage during Al3+ detection. The binding mode exhibits a 1:1M ratio between AhzF and Al3+, which are confirmed by titration test, Job's plot, H-1 NMR spectra and mass spectrum. It also exhibits good reusability by alternate addition of Al3+ and EDTA to the AhzF solution. The pH effect tests suggest its good sensitivity from pH 4 to pH 10 and AhzF can recognize labeled Al3+ in tap water directly by naked eyes, which makes it possible for the application in real environment. (C) 2019 Elsevier B.V. All rights reserved.
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