A recyclable probe for highly selective and sensitive detection of cyanide anion in aqueous medium by fluorescent and colorimetric changes
A recyclable probe for highly selective and sensitive detection of cyanide anion in aqueous medium by fluorescent and colorimetric changes
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DOI：
10.1016/j.snb.2016.03.120
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发表时间：
2016-09
影响因子：
8.4
通讯作者：
Wen-juan Qu;T. Wei;Qi Lin;Wen-ting Li;J. Su;Guoyan Liang;You‐Ming Zhang
中科院分区：
文献类型：
--
作者：
Wen-juan Qu;T. Wei;Qi Lin;Wen-ting Li;J. Su;Guoyan Liang;You‐Ming Zhang
本工作以5-（4-硝基苯基）-2-呋喃和萘并[2，1-B]呋喃-2-碳酰肼为原料，设计了一种新型席夫碱（Q1），并将其应用于水溶液中氰化物的化学剂量计检测。识别过程是通过Q1的酰肼部分与氰化物之间的去质子化进行的。当Q1暴露于低浓度的氰根阴离子溶液中时，在可见光下其颜色由黄色变为橙子，紫外-可见吸收光谱发生了强烈而宽的红移（从λmax-ab= 400 nm到λmax-ab= 468 nm）。与此同时，Q1的最大排放量从775（a.u.）至204（a.u.），在紫外灯（365 nm）下，溶液的颜色由明亮的橙子变为肉眼可见的暗红色。然而，在加入其他常见阴离子，特别是碱性阴离子如F-、AcO-、H2 PO 4-和SCN-后，没有任何信号变化。值得注意的是，这种探针可以作为传感材料中的可回收成分。相应的实验证明，该探头可以重复使用10次以上.（方案1）基于这些观察结果和支持的机理分析，得出结论，可回收探针Q1必须是一种有前途的氰化物阴离子指示剂，其在选择性、易用性、快速响应（<3s）和低的肉眼可辨别的氰化物检测限方面是有吸引力的，同时也将被认为是一种环境友好的材料，可以在水介质中检测氰根离子，为氰根离子传感器的发展做出巨大贡献。
In this work, a novel Schiff-Base (Q1) which based on 5-(4-nitrophenyl)-2-furan and naphtho[2,1-b]furan-2-carbohydrazide was designed to act efficiently in a chemodosimeter approach for the selective detection of cyanide in aqueous medium. The recognition progress occurred via deprotonating between the hydrazide moiety ofQ1and cyanide. When exposedQ1to the low concentration solution of cyanide anion, there was a significant color change from yellow to orange in visible light and accompanied with a strong and broad red shift (fromλmax-ab= 400 nm toλmax-ab= 468 nm) in the UV–vis absorption spectrum. Meanwhile, a dramatically decrease almost 4 times of the emission maximum ofQ1took place from 775 (a.u.) to 204 (a.u.), and the color of the solution changed from bright orange to dim red, which can be saw by naked-eyes under the UV lamp (365 nm). However, without any signal changes after the addition of other common anions, especially the basic anions such as F−, AcO−, H2PO4−and SCN−. Notably, this probe can serve as a recyclable component in sensing materials. The corresponding experiment proved that this probe can be repeated use above 10 times. (Scheme 1) On the basis of these observations and supporting mechanistic analyses, it is concluded that the recyclable probeQ1must be a promising cyanide anion indicator that is attractive in terms of its selectivity, ease-of-use, rapid response (<3 s), and the low, naked-eye discernible cyanide detection limit it, also it will be regarded as an environmental friendly material which can sensing cyanide anion in aqueous medium and making great contribution to the development of cyanide anion sensors.