Dynamics of Heterogeneous Reactions

普林斯顿大学的Andrew Bocarsly教授和Steven Bernasek教授得到了有机动力学项目的支持，他们的研究目标是在分子水平上理解固体表面上的化学反应过程，其中一个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检查由二维自组装产生的手性结构。本研究的最终目标是开发手性模板，以实现固体上的不对称合成，但首先，需要更好的表征和控制结构。离子与碳氢化合物的相互作用将通过在控制良好的自组装表面上散射小有机探针离子（如吡啶或吡咯）来探测。将探讨官能团和链长效应，以澄清混合氢碳和氟碳层中的化学相互作用。内能对金属解离吸附过程产生二氧化碳、一氧化碳、水和甲醛的影响将进一步利用二极管激光吸收光谱来确定催化氧化反应产物的内态分布。激光抽运物质以克服表面反应的障碍仍然是一个目标，这里的工作集中在甲烷解离反应上。功能化硅和金属表面在微电子和分子电子学应用中越来越重要。这些研究的基础信息将有许多最终用途，包括传感器、分离、催化、电子、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.