基于氧气荧光探针的量子点/金属有机框架纳米复合材料的可控合成及性能研究

项目名称： 基于氧气荧光探针的量子点/金属有机框架纳米复合材料的可控合成及性能研究

项目编号： No.21301059

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 李艳

作者单位： 华东理工大学

项目金额： 25万元

中文摘要： 金属有机框架(MOF)作为一种新型多孔材料在分析化学领域具有潜在的应用前景，然而气体分子难以激发MOF材料光电响应的本质限制了基于MOF材料的高灵敏度气体传感器的发展。量子点/金属有机框架纳米复合材料(QD/MOF)因兼具MOF对气体分子的选择性吸附富集特性和量子点对气体的快速光学响应机制而有望解决这一难题。据此，本项目拟将荧光量子点引入MOF材料，设计合成基于O2探针的QD/MOF纳米复合材料。研究采用量子点表面功能化修饰，有机配体与金属离子的层层自组装、以及光学检测等方法，探讨金属离子和有机配体在量子点表面的组装原理、QD/MOF的可控合成途径、以及QD/MOF对气体的吸附及光学响应机制。据此阐明针对O2分子检测要求的金属离子和有机配体在功能化量子点表面的组装策略。本研究的成功为实现基于QD/MOF材料的气体检测提供理论基础，同时为拓展MOF材料的应用提供一条新思路。

中文关键词： 量子点；金属有机配合物；荧光探针；量子点敏化太阳电池；

英文摘要： Metal-organic framework (MOF) as a new type of microporous material has potential applications in the field of analytical chemistry. Although many reports about MOF based ion and organic molecule sensors have been reported, MOF based gas sensors have been rarely developed because of the weak interaction between gas molecules and low sensitivity. The selective adsorption of gas on MOF and the rapid optical response of gas on QDs make the QD/MOF composite a promising candidate for the gas sensor. On the other hand, the detection of O2 is very important in the areas such as environmental monitoring, biological analysis and industrial analysis. Hereby, the preparation of nano-sized QD/MOF composites by the assembly of metal ions and organic ligands on the surface of modified QDs is proposed in this project. Through the investigation on the assembly of metal ions and organic ligands on the functionalized QDs, the principles of the controllable synthesis of QD/MOF for O2 detection will be extensively researched. The accomplishment of this project will provide theoretical and technical supports for the controllable synthesis of nano-particles/MOF composites, especially for QD/MOF. At the same time, the serious restriction to the development of QDs based gas sensors can also be solved, providing new ideas for the applic

英文关键词： quantum dot；metal organic complex；fluorescence probe；quantum dot sensitized solar cell；