Electric Field Gradient Perturbations Due to Van Der Waals Bond Formation

范德华键形成引起的电场梯度扰动

• 批准号: 9727382
• 负责人: Helen Leung
• 金额: $ 16.94万
• 依托单位: Mount Holyoke College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-02-15 至 2001-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9727382&HistoricalAwards=false
• 关键词: Electric; Field; Gradient; Perturbations; Due

Helen Leung is supported by the Experimental Physical Chemistry Program to use Fourier transform microwave (FTMW) spectroscopy to investigate perturbations of electric field gradients around quadrupolar nuclei. Preliminary indications that these perturbations can arise from van der Waals bond formation will be explored by systematic spectroscopic examination of N2O-containing complexes and imidazole-containing complexes. Spectroscopic constants derived from rotational spectra will be systematically compared for a series of complexes, to improve the understanding of intermolecular interactions involving quadrupolar nuclei. This Research in Undergraduate Institutions (RUI) project provides an introduction to modern physical chemistry research methods to undergraduate chemistry majors. Van der Waals molecules are held together by forces that are much smaller than the chemical bonds that hold atoms together in a molecule. Examination of the structure of weakly bound molecules in gas phase complexes provides an opportunity to sort out the specific forces that are at play in a controlled environment. Weak van der Waals interactions are important when molecules are in close proximity to one another, as is the case in biological systems. The research aspects of this RUI project will serve as a meaningful educational vehicle to introduce the scientific method to future scientists.

Helen Leung获实验物理化学计划资助 利用傅里叶变换微波（FTMW）光谱研究 四极核周围电场梯度的扰动。 初步迹象表明，这些扰动可能来自货车德 将通过系统的光谱学方法探索Waals键的形成。 含N2O络合物和含咪唑的 配合物 从转动光谱导出的光谱常数将 系统地比较了一系列复合物，以提高 了解分子间相互作用涉及四极 原子核。 本科院校研究（RUI）项目 提供了现代物理化学研究方法的介绍， 化学专业本科生。 货车范德华分子结合在一起的力 比分子中将原子结合在一起的化学键更重要。 气相中弱束缚分子结构的检验 复合体提供了一个机会，以整理出具体的力量， 都是在受控的环境中进行的 弱货车范德华相互作用 当分子彼此非常接近时， 在生物系统中。 RUI项目的研究方面 将作为一个有意义的教育工具，介绍 未来科学家的科学方法。