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.

乔治敦大学的Yuye Tong教授得到了实验物理化学计划的支持，该计划将核磁共振（NMR）光谱进行研究，以研究烷烷甲醇保护金属（AU，AG，AG，PD和PT）纳米粒子和量子点的金属 - 配体键相互作用。 总体目的是提高对这些纳米级系统中电荷转移的因素的分子水平的理解。 NMR光谱测量正在溶液中的金属纳米颗粒上进行，该溶液中通过电化学电位控制以固定电荷状态保持。 光谱信息用于确定与配体结构和金属纳米颗粒与接触元件之间的配体结构和电子相互作用（S，SE或TE）之间的局部值的局部密度（S，SE或TE）。 这项工作正在开发多核（即13C，77SE，109AG，195PT，125TE）NMR策略，用于一般应用纳米结构材料。 TONG组通过NMR光谱和电化学的联合应用所取得的进步正在影响技术重要性领域，尤其是分子尺度电子产品领域。 该研究正在提供有关金属纳米颗粒和附在表面的配体之间的化学键相互作用的见解。 这项工作在分子电子材料的设计方面具有后果。