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Chemical Imaging of Elementary Steps in Hydrogenation Reactions of Surfaces

表面氢化反应基本步骤的化学成像

基本信息

批准号：
1808422
负责人：
Udo Schwarz
金额：
$ 45.59万
依托单位：
Yale University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-06-01 至 2022-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1808422&HistoricalAwards=false
关键词：
Chemical Imaging Elementary Steps Hydrogenation

项目摘要

With support from the Chemical Measurement and Imaging Program in the Division of Chemistry, Professors Schwarz and Altman at Yale University are developing a new approach for the visualization and characterization of single molecule surface chemistry. This new approach is allowing the groups to control each step of a reaction using the tip of a scanning probe microscope where the specific and unique reaction pathway is chosen at will. Professors Schwarz and Altman are using this technique to study the interactions responsible to drive the reaction and to ultimately reveal the influence of nearby surface defects or other molecules. The research outcomes are opening new venues to study surface chemistry and catalysis. Professors Schwarz and Altman are using carbon-hydrogen and carbon-carbon bond formation to illustrate the power of the technique. These bond formation reactions are fundamentally importantly and could have great impacts to the chemical and petrochemical industry. Professors Schwarz and Altman are using their research outcomes to reach out to the general public.Professors Schwarz and Altman are developing a high-resolution tool to locally map energy landscape between an adsorbed molecule and the surface underneath, with the aims of quantifying energy minima for specific chemical bond formation or dissociation and subsequently manipulating single molecule surface chemistry at will. Specifically, they are (1) further developing their atomic force microscopy technique to quantify the interaction between the tip and a sample, and map potential, forces, and currents in three dimensions; (2) using the developed technique to study adsorption of aromatic molecules and hydrogen, and manipulate their chemical behaviors; and (3) testing the technique with local creation of benzyl radicals and formation of associated products.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在化学系化学测量和成像项目的支持下，耶鲁大学的 Schwarz 和 Altman 教授正在开发一种用于单分子表面化学可视化和表征的新方法。这种新方法允许研究小组使用扫描探针显微镜的尖端控制反应的每一步，并随意选择特定且独特的反应途径。施瓦茨和奥特曼教授正在使用这项技术来研究驱动反应的相互作用，并最终揭示附近表面缺陷或其他分子的影响。研究成果为研究表面化学和催化开辟了新的场所。施瓦茨和奥特曼教授正在利用碳-氢和碳-碳键的形成来说明该技术的威力。这些成键反应非常重要，可能对化学和石化工业产生巨大影响。施瓦茨和奥特曼教授正在利用他们的研究成果来接触公众。施瓦茨和奥特曼教授正在开发一种高分辨率工具，用于局部绘制吸附分子与其下方表面之间的能量图谱，目的是量化特定化学键形成或解离的能量最小值，并随后随意操纵单分子表面化学。具体来说，他们（1）进一步开发原子力显微镜技术来量化尖端和样品之间的相互作用，并在三个维度上绘制电位、力和电流图；（2）利用所开发的技术研究芳香分子和氢的吸附，并操纵它们的化学行为； (3) 通过本地产生苄基自由基和相关产物的形成来测试该技术。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。