荧光共轭聚合物单分子膜的制备及其对硝基芳烃的传感性能研究

项目名称： 荧光共轭聚合物单分子膜的制备及其对硝基芳烃的传感性能研究

项目编号： No.21276149

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 化学工业

项目作者： 崔月芝

作者单位： 齐鲁工业大学

项目金额： 75万元

中文摘要： 荧光共轭聚合物传感器具有特殊的分子导线效应，与待测物作用时，会产生"一点接触，多点响应"信号放大效应，尤其适合微痕量物质的检测，是实现实时检测硝基芳烃的一种很有发展前景的传感器。然而由传统的旋涂法制备的聚合物薄膜传感器往往存在着易泄漏、渗透性差等问题。本课题设计的毛刷状的单分子膜传感器可以很好地克服这些问题。 制备方法：首先合成出一端连有烷氧硅基团的聚对苯撑乙炔基芴(PPEF)，然后通过烷氧硅与玻璃表面上羟基的反应将此共轭聚合物接枝到玻璃片上，形成毛刷状的单分子层结构。 PPEF分子因固定在玻璃表面而不易脱落；毛刷状的结构特点使聚合物分子间存在大量空隙，有利于待测物质与聚合物分子迅速而充分地接触；因而这种独特的传感器结构将充分发挥共轭聚合物所特有的分子导线效应，大大增强传感器对硝基芳烃的响应灵敏度。 本课题拟研究这种新型荧光薄膜传感器的合成方法及其对气相和液相中的硝基芳烃的传感性能。

中文关键词： 荧光传感；硝基芳烃；单分子膜；静电纺丝薄膜；超支化聚合物

英文摘要： Fluorescent conjugated polymer have attracted a great deal of attention for their ability to produce signal gain in response to interactions with analytes. This has led to them being referred to as amplifying fluorescent polymers (AFPs), while some researchers have referred to this gain in terms of superquenching. However, sometimes they can't behave so well as expected because of several problems, such as loss of sensory materials, poor permeability,et al.In this work, we will prepare a sensory with novel structure of brush-like monolayer, which will solve most of the above problems. The preparation procedures are as following: A strong electron acceptor of triazine is used to induce a kind of mechanism named chain-growth polycondensation, by which a macromolecule of Poly(phenyleneethynylene)fluoren (PPEF), with two groups of triethoxysilanyl at one end, is synthesized. This macromolecule is fixed on the actived glass slide by reacting its triethoxysilanyl groups with hydroxyl groups on the surface of glass. Then a brush-like monolayer of PPEF rooted in the glass comes into being. As a sensor for detecting trace of nitroaromatic compounds, the brush-like monolayer show many advantages over its analogue that is prepared by spin-coating method on the glass. Firstly, the loss of sensory materials will not occur

英文关键词： fluorescence sensor；nitroaromatics；monolayer；electrospinning films；hyperbranched conjugated polymers