荧光金属配合物对大气二氧化硫的识别捕获原理与可再生型检测技术研究

Development of rapid and sensitive recognition technology and reproducible real-time visualization testing tools for sulfur dioxide (SO2) is beneficial for environmental monitoring, which will reduce the harm of excessively released sulfur dioxide on the environment and human health. Aiming to the real time and rapid detection of sulfur dioxide in atmosphere, this project is to design and fabricate some novel fluorescent aryl platinum complexes, which combine the principle of special capture, recognition and temperature directed release of SO2 with fluorescence signal output. The fluorescent arylplatinum complexes are effective for developing new type of high selectivity and high sensitive gas detection tools for sulfur dioxide from different sources. The main research contents include: (1) synthesizing fluorescent probes based on arylplatinum complexes with specific recognition function by fluorescent functionalized modifications; (2) exploring the sensitive response mechanism of the probe’s fluorescence enhancement and optimizing the visual signal model with multifarious fluorescence color; (3) investigating the principle and method of assembling the probes on different carrier materials and developing reproducible high sensitive gas detection tubes. On this basis, the qualitative and quantitative relationship between visualized fluorescent signal in tubes and gas concentration will be established. This project provides a new kind of rapid, sensitive identification technology and application method for SO2, also promotes the development of monitoring and control of environmental pollution.

发展快速灵敏的二氧化硫识别捕获技术以及可循环使用的实时可视化检测工具可以有效用于环境监测领域，减少二氧化硫过量排放对环境以及人体健康产生的危害。本项目以二氧化硫气体的实时、可视化快速检测为目标，拟设计制备新型的能特异性捕获识别二氧化硫且具有温控释放性能的荧光芳基铂配合物，从而发展可循环使用的高选择性高灵敏的气体检测工具。主要研究内容包括：（1）对芳基铂配合物进行荧光功能化修饰，制备具有特异性识别功能的荧光芳基铂配合物探针；（2）探索探针的荧光增强信号对气体的敏感响应机制，优化以荧光颜色变化为输出的可视化信号模式；（3）考察探针在不同载体材料上的组装原理与方法，开发可循环使用的高灵敏气体检测管，并建立管中可视化荧光信号与气体浓度的定性定量关系。本项目的预期成果将发展一种新型的快速、灵敏的二氧化硫捕获识别技术与应用方法，对推进大气环境污染的监测与有效控制具有积极意义。

本项目利用金属配合物与二氧化硫气体的特异性结合作用，通过设计合成新型有机荧光配体及其相应的荧光功能化的金属配合物分子探针，建立二氧化硫介导的荧光“通道”，来实现对环境中二氧化硫气体及其他环境污染物的灵敏可视化检测，利用灵敏的光学信号变化实现对环境污染物的更为特异和直观的识别。主要发现点和成果如下：（1）通过设计新型荧光功能配体，制备基于金属配合物的荧光探针，构造荧光开关，实现了对环境中二氧化硫气体的可视化检测。当其他气体污染物存在时，有良好的区分性能与灵敏度；（2）围绕空气以及环境水样中常见的有毒有害物质，设计并制备出多种信号输出灵敏，选择性好的新型纳米或有机分子探针，兼具优良的识别性能；（3）通过对有机配体和金属配合物合成方法的探索，发展出了制备荧光功能化配合物的新方法，为这类配合物在环境污染物的检测应用方面奠定了理论和实验基础。上述研究工作取得了多项具 有一定创新性和系统性的研究成果，部分研究工作已经在Nano Research、Analytical Chemistry、Sensors and Actuators B: Chemical、Talanta等国际期刊上发表SCI收录论文17篇，申请国家发明专利2项。