Magnetic Molecules, Ions, and Clusters

磁性分子、离子和团簇

• 批准号: 9418451
• 负责人: William Weltner
• 金额: --
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-12-15 至 1998-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9418451&HistoricalAwards=false
• 关键词: Magnetic; Molecules; Ions; Clusters

In this project in Experimental Physical Chemistry, Professor Weltner of the University of Florida will study matrix-isolated clusters. Measurements will be made using Electron Spin Resonance, Electron Nuclear Double Resonance, and Far Infrared spectroscopy in high magnetic fields. Information to be obtained from these studies includes structures, ground state symmetry and multiplicity, energies of low lying excited electronic states, zero-field splittings, spin densities, and other electronic and magnetic properties. Species to be studied include the Group IIIA elements, Rare-Earth metal molecules and their oxides and hydrides, and Transition Metal molecules and their oxides and hydrides. The information obtained from these studies will allow valuable comparisons with theory, and has applications in the areas of catalysis and semiconductors. Professor Weltner will trap small metal particles at low temperature and determine their structures and electronic and magnetic properties. These metal clusters exhibit widely varying reactivities and electrical characteristics depending on size and the particular metal used. The information from this study will be useful in understanding how catalysts behave, and in designing more efficient semiconductors.

在实验物理化学的这个项目中，佛罗里达大学的Weltner教授将研究基质孤立的团簇。 测量将使用电子自旋共振，电子核双共振，远红外光谱在高磁场。 从这些研究中获得的信息包括结构，基态对称性和多重性，低位激发电子态的能量，零场分裂，自旋密度和其他电子和磁性。 待研究的物种包括第三族元素、稀土金属分子及其氧化物和氢化物、过渡金属分子及其氧化物和氢化物。 从这些研究中获得的信息将允许与理论进行有价值的比较，并在催化和半导体领域有应用。 Weltner教授将在低温下捕获小金属颗粒，并确定它们的结构以及电子和磁性。 这些金属簇表现出广泛变化的反应性和电特性，这取决于大小和所使用的特定金属。 这项研究的信息将有助于理解催化剂的行为，并设计更有效的半导体。