Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 219, Issue -, Pages 202-205Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2019.04.058
Keywords
Turn-on fluorescent sensor; Excited state intramolecular proton transfer; Photoelectron transfer; Aluminum ion
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Funding
- National Natural Science Foundation of China [21672130, 21601065]
- Natural Science Foundation of Shandong Province [ZR2017MEM006]
- China Postdoctoral Science Foundation [2018M632603]
- Project of Shandong Province Higher Educational Science and Technology Program [J16LA08]
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Aluminum is known as the most ubiquitous metal in earth's crust but its excessive exposure will cause damage to environment and health of the organism. Here, a turn-on Schiff base fluorescence probe STH based on excited state intramolecular proton transfer and photoelectron transfer processes for Al3+ detection with fast response rate (within minutes), low detection limit (4.26 x 10(-8) M), high selectivity and reasonable pH application range (5.0-8.0) was developed. Fluorescence titration experiments show that probe STH has an excellent linear relationship (R-2 = 0.9694) with Al3+ concentration and could be applied to quantitatively recognize Al3+ in realwater samples. Based on Job's plot and in situ mass spectra, two SDI molecules will complex with Al3+ to form 2:1 complexation with oxygen atoms of hydroxyl and carbonyl groups and nitrogen atom of C=N bond participating in coordination. (C) 2019 Elsevier B.V. All rights reserved.
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