Dynamics of Heterogeneous Reactions

普林斯顿大学的Andrew Bocarsly和Steven Bernasek教授得到了有机动力学计划的支持，其研究目标是获得固体表面化学反应过程的分子水平理解，主要主题是无机表面上的有机部分。第一个项目使用扫描隧道显微镜来检查二维自组装产生的手性结构。 最终，这项研究的目的是开发手性模板，实现固体上的不对称合成，但首先，更好的表征和控制的结构是寻求。 离子-烃相互作用将通过在良好控制的自组装表面上散射小的有机探针离子如吡啶或吡咯来探测。 官能团和链长的影响将被探讨，以澄清在吸附层与混合的氢和氟碳化合物的化学相互作用。 内能对金属解离吸附过程的影响产生二氧化碳、一氧化碳、水和甲醛，将进一步研究使用二极管激光吸收光谱法来确定催化氧化反应产物的内部状态分布。 激光泵浦的物种，以克服障碍，表面反应仍然是一个目标，这里的工作集中在甲烷解离反应。 功能化的硅和金属表面对于微电子和分子电子应用越来越重要。 从这些研究中获得的基本信息将有许多最终用途，包括传感器，分离，催化，电子学，质谱以及电化学的发展。

Professor Andrew Bocarsly and Steven Bernasek of Princeton University are supported by the Organic Dynamics Program for studies with the goal of obtaining a molecular-level understanding of chemical reaction processes on solid surfaces, with a major theme being organic moieties on inorganic surfaces. The first project uses scanning tunneling microscopy to examine chiral structures resulting from two-dimensional self-assembly. Ultimately this research aims at developing chiral templates to achieve asymmetric synthesis on solids, but first, better characterization and control of the structures is sought. Ion-hydrocarbon interactions will be probed by scattering small organic probe ions such as pyridine or pyrrole on well-controlled self-assembled surfaces. Functional groups and chain length effects will be explored for clarifying chemical interactions in adlayers with mixed hydro- and fluoro-carbons. The effects of internal energy on the course of dissociative adsorption on metals producing carbon dioxide, carbon monoxide, water and formaldehyde will be further examined using diode laser absorption spectroscopy to determine the internal state distribution of the products of catalytic oxidation reactions. Laser pumping of species to overcome barriers to surface reactions continues to be a goal with work here focused on methane dissociation reactions. Functionalized silicon and metal surfaces are of growing importance for micro- and molecular-electronics applications. The fundamental information from these studies will have many end uses including the development of sensors, separations, catalysis, electronics, mass spectrometry as well as electrochemistry.