基于希夫碱封端的水溶性聚合物的简单开启型荧光化学传感器用于在 100%水溶液中选择性检测 Al。
A simple turn-on fluorescent chemosensor based on Schiff base-terminated water-soluble polymer for selective detection of Al in 100% aqueous solution.
机构信息
School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, China.
School of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2019 May 5;214:436-444. doi: 10.1016/j.saa.2019.02.062. Epub 2019 Feb 19.
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 Al as a turn-on fluorescent chemosensor without influence by other competitive metal ions in 100% aqueous solution. The detection limit of PEGBHB for Al was found to be 9.67 × 10 M. A 1:1 stoichiometry between PEGBHB and Al has been confirmed by Job plot analysis. PEGBHB could detect Al over a wide pH range from 4 to 10. The chemosensor was reversible by adding EDTA to the solution of PEGBHB-Al complex. An INHIBIT molecular logic gate was constructed with the help of OFF-ON-OFF signal on alternate addition of Al and EDTA to the chemosensor. Furthermore, test papers were fabricated facilely using PEGBHB for convenient and visual detection of practical Al.
一种基于聚乙二醇的简单水溶性聚合物 PEGBHB 成功设计并合成，其带有席夫碱衍生物部分。PEGBHB 作为一种开启型荧光化学传感器，在 100%水溶液中对 Al 表现出高选择性和灵敏度，不受其他竞争金属离子的影响。发现 PEGBHB 对 Al 的检测限为 9.67×10-7 M。通过 Job 作图分析证实了 PEGBHB 和 Al 之间的 1:1 化学计量关系。该化学传感器可在 pH 值从 4 到 10 的较宽范围内检测 Al。通过向 PEGBHB-Al 配合物溶液中加入 EDTA，可使化学传感器恢复原状。借助于交替添加 Al 和 EDTA 到化学传感器上的 ON-OFF-OFF 信号，构建了 INHIBIT 分子逻辑门。此外，还使用 PEGBHB 制备了测试纸条，用于方便、直观地检测实际 Al。
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