Abstract
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+.
Highlights
Aluminum, the most abundant metal element in the earth’s crust, has been widely applied in industry and daily life [1,2]
We have successfully developed a novel water-soluble polymer-based fluorescent
We have successfully developed a novel water-soluble polymer-based fluorescent chemosensor PEGBAB by incorporating salicylidene Schiff base derivative into the hydrophilic polymer chemosensor PEGBAB by incorporating salicylidene Schiff base derivative into the hydrophilic
Summary
The most abundant metal element in the earth’s crust, has been widely applied in industry and daily life [1,2]. A series of common methods have been used to detect Al3+ ions, such as atomic absorption spectroscopy, graphite furnace atomic absorption spectrometry, inductively-coupled plasma atomic emission spectrometry, inductively-coupled plasma mass spectrometry, and voltammetry [8,9,10,11,12,13]. These methods are expensive, relatively complex and time-consuming in practice. The development of fluorescent chemosensors for Al3+ is relatively
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