针对气相氮氧自由基和臭氧及其相互作用的荧光分析方法研究

项目名称： 针对气相氮氧自由基和臭氧及其相互作用的荧光分析方法研究

项目编号： No.21475134

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 王素华

作者单位： 华北电力大学

项目金额： 88万元

中文摘要： 气相氮氧化物自由基和臭氧等分子是空气中的主要污染物,是PM 2.5发生发展的诱因。实现这几种高反应活性气体分子的检测是分析化学的重要研究课题，而其活泼的化学性质往往导致较低的检测选择性。本项目拟将量子点优良的荧光性能与有机金属配合物的配位性质相结合，设计几种针对氮氧化物和臭氧分子的颜色变化灵敏的荧光开关或者比率型探针，通过目标气体分子与识别位点（如金属中心）的特异性响应，引起探针分子结构或者量子点发光强度的变化，实现目标气体分子的高灵敏信号响应。基于建立的荧光分析方法探索几种活性分子之间的转化关系，通过探针在不同气体环境中的荧光响应和信号分析，建立这几种气体分子之间的转换模型，实现环境空气中氮氧化物和臭氧分子的高灵敏可视化检测。本项目的预期研究成果将为气体污染物分子的快速准确可视化检测提供新的技术支撑，对于提升我国在气体污染物检测技术方面的原始创新能力具有十分重要的意义。

中文关键词： 荧光探针；量子点；气体自由基；可视化检测；纳米材料

英文摘要： As the main pollutants in the air, nitrogen oxides free radicals and ozone trigger the occurrence and development of PM 2.5. So it is imperative to develop rapid, sensitive, and visual detection methods and techniques for these gaseous molecules. However, their active chemical properties often lead to low detection selectivity. Combining the excellent fluorescence properties of quantum dots and the coordination nature of metal complex, we intend to design and synthesize several fluorescent switch or ratiometric probes for highly sensitive nitrogen oxides and ozone detection with great color change, respectively. The special recognition sites (such as a metal center) of these probes responding to the target gaseous pollutant will result change of the structure of metal complex or the fluorescence intensity of quantum dots. Besides, we will explore the relationship in air atmosphere, establish the molecule transformation model of these gaseous molecules with as-prepared fluorescent probes, and achieve the sensitive and visual detection of nitrogen oxides and ozone in air, by analyzing the fluorescence signal of different species with various concentrations. This project provides new technical support for fast and accurate visualization of gaseous pollutants detection and has great significance for enhancing the ability of original innovation in the gaseous pollutants detection technology.

英文关键词： fluorescent probe;quantum dots;gaseous free radicals;visual detection;nano materials