Mode-Selective Differential Scattering Studies of Ion-Molecule Reaction Dynamics

Scott L.博士犹他州大学的安德森获得了化学系物理化学项目的资助，用于离子分子反应动力学的模式选择微分散射研究。 这种散射技术将被用来，结合理论，阐明多原子阳离子反应的详细机制。 甲醛阳离子的反应将用于探测碰撞能量和振动对所产生的化学反应的影响，并将与William Hase博士合作进行反应动力学的直接动力学模拟。 我们将与吴卓博士和Rainer Dressler博士合作，利用同步辐射研究水与其他小型阳离子的反应，这些阳离子不受实验室状态选择的影响。 我们将利用REMPI光电子能谱探测里德伯态的性质，发展新的阳离子选态路线，并研究这些离子的反应。 多原子分子之间的反应动力学通常取决于动能和内能如何在内部自由度之间分配。 激光激发和离子散射方法将被用来调整选定的反应物的各种状态的激发和由此产生的碰撞和反应动力学将实验测量和理论计算和模拟。 这些研究将为我们理解燃烧和星际化学中重要的气相反应提供至关重要的进展。

Dr. Scott L. Anderson of the University of Utah is funded for his research on mode-selective differential scattering studies of ion-molecule reaction dynamics by the Physical Chemistry Program of the Chemistry Division. This scattering technique will be used, in conjunction with theory, to elucidate the detailed mechnisms for reaction of polyatomic cations. Reactions of formaldehyde cation will be used to probe the effects of collisional energy and vibrations on resulting chemistry, and direct-dynamics simulations of the reaction dynamics will be done in collaboration with Dr. William Hase. Synchrotron radiation studies of reactions of water with other small cations, not amenable to laboratory state-selection, will be made in collaboration with Dr. Cheuk Ng and Dr. Rainer Dressler. REMPI photoelectron spectroscopy probing Rydberg state properties and developing new cation state-selection routes will be done, and the reactions of these ions will be studied. Reaction dynamics among polyatomic molecules generally depend on kinetic energy and upon how internal energy is partitioned among internal degrees of freedom. Laser excitation and ion scattering methods will be used to tune selected reactants to various states of excitation and the resulting collision and reaction dynamics will be experimentally measured and theoretically calculated and simulated. These studies will provide critically important advances in our understanding of important gas-phase reactions important in combustion and interstellar chemistries.