Constitution of a visual detection system for lead(II) on polydiacetylene-glycine embedded nanofibrous membranes
Constitution of a visual detection system for lead(II) on polydiacetylene-glycine embedded nanofibrous membranes
复制标题
聚二乙炔-甘氨酸包埋纳米纤维膜上铅(II)视觉检测系统的构建
DOI：
10.1039/c5ta00608b
复制
发表时间：
2015-01-01
影响因子：
11.9
通讯作者：
Yu, Jianyong
中科院分区：
文献类型：
--
作者：
Li, Yan;Wang, Lihuan;Yu, Jianyong
为了开发类似ph值纸的铅离子（Pb2+）传感材料，我们展示了一种比色条，它依赖于二氧化硅纳米颗粒（NP）修饰的聚二乙炔嵌入聚丙烯腈纳米纤维膜（PAN NFM），在Pb2+的作用下，它经历了一个明亮的蓝到红的颜色转变以及“开启”荧光。将氨基酸（甘氨酸）头基引入超分子组装的10,12-五代二甲酸中，得到Pb2+诱导的铬共轭聚合物，该聚合物可快速光聚合，对Pb2+反应迅速，并且具有特异性可识别性。此外，当SiO2纳米粒子在条带中的含量达到0.5 wt%时，被证明是一种有效的灵敏度促进剂。在这样的理解下，0.24 μ M Pb2+在环境温度下引起的颜色变化可以很容易地被肉眼感知，这表明我们的条带与之前的方法相比具有优势，并且值得注意的是，我们的条带也可以在2分钟内产生荧光信号。此外，通过智能手机自动读出的条带图像和RGB（红绿蓝）数字参数通过主成分分析进行统计处理，然后用于制作标准曲线和定量Pb2+浓度。这种分析和定量Pb2+的方法避免了耗时的样品制备、昂贵的实验室技术和执行传统分析方法所需的专业人员。
With the aim to develop pH-paper-like lead ion (Pb2+) sensing materials, we demonstrate a colorimetric strip, which relies on a SiO2 nanoparticle (NP) decorated polydiacetylene embedded polyacrylonitrile nanofibrous membrane (PAN NFM), that undergoes a brilliant blue-to-red color transition as well as 'Turn-On' fluorescence upon incubation with Pb2+. The introduction of an amino acid (glycine) headgroup into a supramolecularly assembled 10,12-pentacosadiynoic acid results in a Pb2+-induced chromic conjugated polymer that is quickly photopolymerizable, rapidly responsive to Pb2+ and specifically identifiable. Moreover, the SiO2 NPs are certified as an efficient sensitivity promoter when their content reaches 0.5 wt% in the strip. With this understanding, the color change that is caused by 0.24 mu M Pb2+ at ambient temperature can be easily perceived by the naked eye, which indicates the superiority of our strip compared with previous approaches, and it is also noteworthy that a fluorescent signal could also be produced in 2 min. Furthermore, RGB (red-green-blue) digital parameters obtained from images of the strips and automatic read outs via a smartphone were processed statistically through principal component analysis and then used to elaborate the standard curve and quantify Pb2+ concentration. This methodology for assaying and quantifying Pb2+ avoids time-consuming sample preparation, expensive laboratory techniques, and specialized personnel required to carry out conventional analytical methods.