Intramolecular Energy Flow in Excited Electronic States

Edward C. Lim教授获物理化学计划资助，研究激发态的分子内能量流。林教授使用分子束和激光激发技术制备处于特定激发态的分子系统，然后探测其随时间的函数。这些研究的动机是希望通过控制吸收激光辐射的局部化来找到一种模式特异性或键特异性化学的途径。林教授采用的实验方法利用时间分辨光电离和激光诱导荧光在种子分子束。皮秒和纳秒激光通过频域和时域实验来探测材料的结构和动态特性。这些实验技术被用于探索各种有趣的化学系统，包括：芳香羰基、卤代蒽和范德华分子。

Professor Edward C. Lim is supported by a grant from The Physical Chemistry Program to study intramolecular energy flow in excited electronic states. Professor Lim uses molecular beam and laser excitation techniques to prepare molecular systems in very specific excited states which are then probed as a function of time. These studies are motivated by a desire to find a route to mode-specific or bond-specific chemistry through controlled localization of absorbed laser radiation. The experimental approach employed by Professor Lim utilizes time-resolved photoionization and laser-induced fluorescence in seeded molecular beams. Picosecond and nanosecond lasers are used to probe structural and dynamic properties via frequency- and time-domain experiments. These experimental techniques are being used to explore a large variety of interesting chemical systems including: aromatic carbonyls, halogenated anthracenes and van der Waals molecules.