Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 214, Issue -, Pages 436-444Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2019.02.062
Keywords
Al3+ ions; Fluorescent chemosensor; Schiff base; Water-soluble polymer; Test paper
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Funding
- National Natural Science Foundation of China [51503094]
- Natural Science Foundation of Shandong Province [ZR2015BQ002]
- Shandong Province Higher Education Science and Technology Program [J16LA01]
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A simple water-soluble polymer PEGBHB based on polyethylene glycol bearing a Schiff base derivative moiety was successfully designed and synthesized. PEGBHB showed high selectivity and sensitivity towards Al3+ as a turn-on fluorescent chemosensor without influence by other competitive metal ions in 100% aqueous solution. The detection limit of PEGBHB for Al3+ was found to be 9.67 x 10(-9) M. A 1:1 stoichiometry between PEGBHB and Al3+ has been confirmed by Job plot analysis. PEGBHB could detect Al3+ over a wide pH range from 4 to 10. The chemosensorwas reversible by adding EDTA to the solution of PEGBHB-Al3+ complex. An INHIBIT molecular logic gatewas constructedwith the help of OFF-ON-OFF signal on alternate addition of Al3+ and EDTA to the chemosensor. Furthermore, test papers were fabricated facilely using PEGBHB for convenient and visual detection of practical Al3+. (C) 2019 Published by Elsevier B.V.
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