离子液体功能化碳量子点的制备、纯化、光致荧光性质及发光机制研究

项目名称： 离子液体功能化碳量子点的制备、纯化、光致荧光性质及发光机制研究

项目编号： No.51302273

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 王宝刚

作者单位： 中国科学院兰州化学物理研究所

项目金额： 25万元

中文摘要： 获得高效且荧光可调的碳量子点是化学和材料科学家共同面对的重要而紧迫的课题，相关研究将对生命科学、分析科学和材料科学产生不可估量的影响。 基于酰胺化反应，探索出一种功能化碳量子点的新手段-离子液体功能化手段，采用多步修饰和一步热解方式制备一系列离子液体功能化的碳量子点；依据离子液体亲/疏水性质可调性，发展出一种纯化离子液体功能化碳量子点的新方法-相转移方法；除溶剂、pH、离子强度传统调控方式外，实现从离子液体分子结构设计上调控碳量子点的光致荧光性质，构建离子液体分子结构与碳量子点光致荧光性质之间的可调控关系；表征离子液体功能化碳量子点的结构成分，考察其光学性质，揭示出两者之间的规律与关联，筛选出一批具有应用前景的功能化碳量子点，阐述碳量子点的发光机制。 项目的开展将拓宽和深化碳量子点的功能化、纯化、光致荧光性质和发光机制研究，为其在生物学、化学和材料学领域的应用研究提供材料支持和理论指导。

中文关键词： 离子液体；碳量子点；量子产率；减摩抗磨性能；润滑添加剂

英文摘要： It is still a significant and urgent subject for both chemistry and material scientists to obtain carbon quantum dots (CDs) with high-efficiency and tunable fluorescence. The related research will play an immeasurable role in life, analytical and material sciences. Based on amidation, a new functionalization mean of CDs named ionic liquid (IL) functionalizaion mean is first explored.Then a series of CDs functionalized by IL are prepared by two ways of multi-step modification and one-step pyrolysis. According to tunable hydrophilic/hydropholic property of IL, a new purification method of functionalized CDs called phase transfer method is developed.The photoluminescence of CDs will be regulated by designing the molecular structure of IL except some traditional ways of solvent, pH and ionic strength, and hence the tunable relation between the molecular structure of IL and the photoluminescence property of CDs is constructed. The structure/composition of IL functionalized CDs are characterized and their optical property are investigated. A batch of IL functionalized CDs with application prospect are screened and the luminescence mechanism of CDs is described by revealing regularity and relevance between their structure/composition and optical property. Development of this project can widen and deepen the research on

英文关键词： ionic liquid；carbon quantum dots；quantum yield；friction-reducing and antiwear properties；lubricant additive