Laser Studies of Equilibrium and Time Dependent Processes at Liquid Interfaces

哥伦比亚大学的Kenneth Eisenthal在实验物理化学项目的支持下继续他在液体界面的化学反应动力学和化学平衡方面的研究。他将进一步开发和改进方法，扩展接口研究的方式。他的主要研究重点将是利用二次谐波产生（SHG）和红外加可见光（或紫外线）和频率产生（SFG）来研究空气/水、油/水和固体/水界面的酸碱反应/动力学。本研究包括基电子态酸碱平衡、分子间质子转移和光电子态酸碱平衡的光化学和光物理研究。所提出的研究的意义源于物理和生物世界的非均匀性，因此分离物质的不同阶段和结构的界面的流行。因此，在微观层面上理解界面是很重要的。由于界面在技术（计算机芯片的蚀刻、液相催化和转移）、环境（空气/水、土壤/水、空气/大气气溶胶和空气/平流层酸性冰表面）和医学（药理学、麻醉和一般膜化学和光化学中的药物输送）中发挥的重要作用，它的重要性也超出了基础科学。

Kenneth Eisenthal of Columbia University is supported by the Experimental Physical Chemistry Program to continue his studies on chemical reaction dynamics and chemical equilibria at liquid interfaces. He will further develop and refine methods that will extend the ways in which interfaces can be investigated. The major focus of his research will be the use of second harmonic generation (SHG) and infrared plus visible (or ultraviolet) sum frequency generation (SFG) to investigate acid-base reactions/dynamics at air/water, oil/water, and solid/water interfaces. This research includes studies of ground electronic state acid-base equilibria and the photochemistry and photophysics of intermolecular proton transfer and excited electronic state acid-base equilibria. The significance of the proposed research derives from the inhomogeneous nature of the physical and biological world and thus the prevalence of interfaces separating the various phases and structures of matter. For this reason it is important to develop an understanding of interfaces at the microscopic level. There is also a significance that extends beyond fundamental science because of the major role interfaces play in technology (etching of computer chips, liquid phase catalysis and transfer), in the environment (air/water, soil/water, air/atmospheric aerosols, and air/stratospheric acidic ice surfaces), and in medicine (drug delivery in pharmacology, anesthesia and general membrane chemistry and photochemistry).