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Open AccessArticle

A Highly Selective Turn-on and Reversible Fluorescent Chemosensor for Al3+ Detection Based on Novel Salicylidene Schiff Base-Terminated PEG in Pure Aqueous Solution

School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, China
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Polymers 2019, 11(4), 573; https://doi.org/10.3390/polym11040573
Received: 4 March 2019 / Revised: 21 March 2019 / Accepted: 25 March 2019 / Published: 27 March 2019
(This article belongs to the Special Issue Polymers for Chemosensing II)
The development of highly selective and sensitive chemosensors for Al3+ detection in pure aqueous solution is still a significant challenge. In this work, a novel water-soluble polymer PEGBAB based on salicylidene Schiff base has been designed and synthesized as a turn-on fluorescent chemosensor for the detection of Al3+ in 100% aqueous solution. PEGBAB exhibited high sensitivity and selectivity to Al3+ over other competitive metal ions with the detection limit as low as 4.05 × 10−9 M. PEGBAB displayed high selectivity to Al3+ in the pH range of 5–10. The fluorescence response of PEGBAB to Al3+ was reversible in the presence of ethylenediaminetetraacetic acid (EDTA). Based on the fluorescence response, an INHIBIT logic gate was constructed with Al3+ and EDTA as two inputs. Moreover, test strips based on PEGBAB were fabricated facilely for convenient on-site detection of Al3+. View Full-Text
Keywords: aluminum ions; fluorescent chemosensor; schiff base; water-soluble polymer; test strips aluminum ions; fluorescent chemosensor; schiff base; water-soluble polymer; test strips
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MDPI and ACS Style

Bai, L.; Xu, Y.; Li, G.; Tian, S.; Li, L.; Tao, F.; Deng, A.; Wang, S.; Wang, L. A Highly Selective Turn-on and Reversible Fluorescent Chemosensor for Al3+ Detection Based on Novel Salicylidene Schiff Base-Terminated PEG in Pure Aqueous Solution. Polymers 2019, 11, 573.

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