An Electrochemical NMR Investigation of Ligand-Protected Metal Quantum Dots: Metal-Ligand Interactions and Ramifications in Molecular Electronics

配体保护的金属量子点的电化学核磁共振研究：分子电子学中的金属-配体相互作用和衍生

• 批准号: 0456848
• 负责人: YuYe Tong
• 金额: --
• 依托单位: Georgetown University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0456848&HistoricalAwards=false
• 关键词: Electrochemical; NMR; Investigation; Ligand; Protected

Professor YuYe Tong of Georgetown University is supported by the Experimental Physical Chemistry program to apply nuclear magnetic resonance (NMR) spectroscopy to investigate metal-ligand bonding interactions in alkanechalcogenol-protected metal (Au, Ag, Pd, and Pt) nanoparticles and quantum dots. A general aim is to advance understanding at the molecular level of factors that govern charge transfer in these nanoscale systems. NMR spectroscopy measurements are being performed on metal nanoparticles in solution that are held in a fixed charge state through electrochemical potential control. The spectroscopic information is being used to determine Fermi level local density of state values in relation to ligand structure and electronic interactions between the metal nanoparticle and the contacting element (S, Se, or Te). The work is developing multinuclear (i.e., 13C, 77Se, 109Ag, 195Pt, 125Te) NMR strategies for general application to nanostructured materials. Advances being made by the Tong group through combined applications of NMR spectroscopy and electrochemistry are impacting areas of technological importance, in particular the field of molecular scale electronics. The research is providing insights into chemical bonding interactions between metal nanoparticles and ligands attached to the surface. The work has ramifications in the design of molecular electronic materials.

乔治城大学的 YuYe Tong 教授在实验物理化学项目的支持下，应用核磁共振 (NMR) 光谱研究烷硫族元素保护的金属（Au、Ag、Pd 和 Pt）纳米粒子和量子点中的金属-配体键合相互作用。 总体目标是在分子水平上促进对这些纳米级系统中控制电荷转移的因素的理解。 核磁共振波谱测量是对溶液中的金属纳米颗粒进行测量，这些纳米颗粒通过电化学势控制保持在固定电荷状态。 光谱信息用于确定与配体结构以及金属纳米粒子和接触元素（S、Se 或 Te）之间的电子相互作用相关的费米能级局部状态密度值。 这项工作正在开发多核（即 13C、77Se、109Ag、195Pt、125Te）NMR 策略，以普遍应用于纳米结构材料。 Tong 小组通过核磁共振波谱学和电化学的结合应用所取得的进展正在影响具有重要技术意义的领域，特别是分子级电子学领域。 该研究为金属纳米粒子和附着在表面的配体之间的化学键相互作用提供了见解。 这项工作对分子电子材料的设计产生了影响。