Experimental Investigations of Fullerenes in Solid-Like States, Solutions, and Supercritical Fluids

9320558孙先进材料与加工项目，支持孙亚平教授的研究。本课题的研究主题是C60和C70簇在类固态、溶液和超临界流体中的识别和表征。解决方案的研究将集中在富勒烯的激发态性质上，特别是C60和C70的实验和计算跃迁概率之间的差异。假设从热密集的低洼激发态排放的机制将通过温度和溶剂依赖的研究来评估。由于富勒烯在普通溶剂中的溶解度较低，超临界流体将用于依赖溶剂的研究。将超临界流体引入富勒烯研究还将确定溶剂系统，在该系统中，可以创建可变溶剂环境，用于研究溶剂对富勒烯电子和电荷转移反应的影响。富勒烯和富勒烯团簇的光物理研究将促进我们对π共轭分子和聚合物的激发态行为的一般理解，并将影响诸如π共轭聚合物基发光二极管等新兴技术。

9320558 Sun This award is made in the Advanced Materials and Processing Program in support of the research of Professor Ya-Ping Sun. The theme of the research is the identification and characterization of C60 and C70 clusters in solid-like states, solution and supercritical fluids. The solution studies will focus on the excited state properties of the fullerenes, especially the discrepancy between experimental and calculated transition probabilities for both C60 and C70. A mechanism in which emissions from thermally populated low-lying excited states are assumed will be evaluated by temperature and solvent-dependent investigations. Because of low solubilities of the fullerenes in common solvents, supercritical fluids will be used in the solvent-dependent studies. The introduction of supercritical fluids into fullerene research will also identify solvent systems in which variable solvent environments can be created for studies of solvent effects on electron and charge-transfer reactions of fullerenes. Research on the photophysics of fullerenes and fullerene clusters will advance our general understanding of the excited-state behavior of pi-conjugated molecules and polymers and will impact emerging technologies such as pi-conjugated polymer-based light-emitting diodes.