Ultrafast Dynamics of Stretched Liquids

9418361 Fourkas这个启动补助金授予波士顿学院将支持教授约翰Fourkas的研究。这项研究将集中在拉伸液体的超快动力学。负压技术将用于控制分子间吸引力的相对重要性。 超快非线性光学光谱技术将被用来作为一个敏感的，实时的探针的微观动力学的张力引起的分子间的潜力的变化的影响。 光学克尔效应实验将监测拉伸对分子间振动和分子内再取向动力学的影响，这两者都受到吸引力的强烈影响。 最初的实验将涉及研究水的异常行为，并将开发技术来研究在相当大的负压下的任意液体。 吸引和排斥分子间相互作用的作用的详细知识是必不可少的，在发展的微观细节的化学过程中的解决方案的理解，最终目标是能够直接观察和控制的过程中的化学反应溶液通过在液体本身的性质的变化。

9418361 Fourkas This starter grant award to Boston College will support the research of Professor John Fourkas. The research will focus on ultrafast dynamics of stretched liquids. Negative presure techniques will be used to control the relative importance of intermolecular attractive forces. Ultrafast nonlinear-optical spectroscopic techniques will be used as a sensitive, real-time probe of the microscopic dynamics that are affected by tension-induced changes in the intermolecular potential. Optical Kerr effect experiments will monitor the effects of stretching on intermolecular vibrational and intramolecular reorientational dynamics, both of which are strongly affected by attractive forces. Initial experiments will involve studying anomalous behavior of water, and techniques will be developed to study arbitrary liquids at substantial negative pressures. A detailed knowledge of the roles of attractive and repulsive intermolecular interactions is essential in developing an understanding of the microscopic details of chemical processes in solution with the ultimate goal of being able to observe and control directly the course of chemical reactions in solution through changes in the nature of the liquid itself.