Mercury(编程语言)
水溶液
检出限
荧光
水溶液中的金属离子
化学
聚合物
离子
聚乙烯醇
发光
无机化学
材料科学
色谱法
有机化学
光电子学
物理
程序设计语言
量子力学
计算机科学
作者
Shuisheng Wu,Yujiao Yang,Cheng Yang,Shuodong Wang,Zhengqing Zhou,Pei Zhang,Xinqi Zhu,Baodui Wang,Hua Zhang,Sheng Xie,Zebing Zeng,Ben Zhong Tang
出处
期刊:Aggregate
[Wiley]
日期:2022-10-29
卷期号:4 (3)
被引量:15
摘要
Abstract A “turn‐on” fluorescent sensing strategy was developed for ultrasensitive detection of heavy metal mercury ion (Hg 2+ ) directly in water. It utilized an aqueous soluble aggregation‐induced emission (AIE)‐active probe, named 1,1,2,2‐tetrakis(4‐(1H‐tetrazol‐5‐yl)phenyl)ethene (TPE‐4TA), composing of a luminescent tetraphenylene core and multiple anionic tetrazolate spawns. The probe retained dark when molecularly dissolved in water. However, mercury ions can ligate with multiple tetrazolate groups to form infinite coordination polymer particles spontaneously, thus inducing a fluorogenic AIE response for in situ analysis. Moreover, by embedding this AIE sensing molecules in a hydrophilic polyvinyl alcohol substrate, the resulting hydrogel film allowed in situ detection of Hg 2+ on a laser‐induced fluorescence analysis setup in aqueous environment. This strategy worked effectively in common aqueous environments with pH from 4 to 7.5 and showed high sensitivity (limit of detection down to 0.38 ppb/1.9 nM), good selectivity and a wide linearity range for quantification. This work may lead to a reliable and promising platform for on‐site environmental water analysis.
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