Laser Wavelength Specific Photodissociation of Biological Molecules in Supersonic Beams

在化学系分析和表面化学计划支持的研究中，卢布曼教授和他的学生将研究离子在激光光激发下的碎裂。通过调整光的波长，不同数量的能量将被传递给分子，从而允许选定的几组键断裂。长期目标是开发能够对相似生物分子进行差异检测的方法。在化学部分析和表面化学计划资助的研究中，卢布曼的团队将研究近阈值光激发所允许的气相离子碎裂的竞争动力学。在无碰撞的环境中，吸收能量的内部重新分配允许选定的键子集断裂。虽然人们不能以特定键的断裂为目标，但人们希望在特定的激发条件下，特征键集可以被动力学地优先选择。

In research supported by the Analytical and Surface Chemistry Program in the Chemistry Division, Professor Lubman and his students will study the fragmentation of ions subjected to laser photoexcitation. By adjusting the wavelength of the light, varying amounts of energy will be imparted to the molecules, thus allowing selected sets of bonds to break. The long term goal is to develop methods which will allow differential detection of similar biomolecules. %%% In research supported by the Analytical and Surface Chemistry Program in the Chemistry Division, Lubman's group will investigate the competitive kinetics of gas phase ion fragmentation permitted by near-threshold photoexcitation. In a collisionless environment, internal redistribution of absorbed energy allows selected subsets of bonds to break. While one cannot target breaking of specific bonds, it is hoped that characteristic sets of bonds can be kinetically preferred for particular excitation conditions.