Time Resolved Studies of Molecular Clusters (Chemistry)

伯恩斯坦博士和凯利博士计划对时间进行研究， 分子和分子光物理学 在超音速分子射流中制备和分离的簇。 本文的工作将围绕超声速分子射流展开 溶质-溶剂团簇和溶质光谱研究 二聚体，也将处理时间解决（皮秒） 简单化学反应和分子内光谱 动力学 分子喷射产生非常冷的分子， 分离的团簇，便于光学光谱分析 通过包括荧光在内的技术进行表征 激发、分散发射和双色飞行时间 质谱法 低温溶液具有特殊的光谱学意义 用于研究液体状态和溶液现象， 将军 众所周知的分子系统可以用作 稀释的光谱探针的溶剂，和低 溶液的温度允许获得优异的 液态光谱分辨率 有可能 通过光谱观察簇，二聚体， 和货车范德华分子;本质上， 溶液中的成核和沉淀过程 spectroscopically跟踪

Drs. Bernstein and Kelley plan a study of the time resolved photophysics and photochemistry of molecules and molecular clusters prepared and isolated in a supersonic molecular jet. The work will be centered about supersonic molecular jet spectroscopic studies of solute-solvent clusters and solute dimers and will also deal with time resolved (picosecond) spectroscopy of simple chemical reactions and intramolecular dynamics. The molecular jet produces very cold molecules and clusters isolated for easy optical spectroscopic characterization by techniques including fluorescence excitation, dispersed emission, and two-color time of flight mass spectroscopy. Cryogenic solutions are of particular spectroscopic interest for the study of the liquid state, and solution phenomena in general. Well known molecular systems can be employed as dilute spectroscopic probes of the solvent, and the low temperature of the solution allows one to obtain excellent liquid state spectroscopic resolution. It is possible to observe spectroscopically the formation of clusters, dimers, and van der Waals molecules; in essence, the preliminary stages of nucleation and precipitation processes in solution can be followed spectroscopically.