Nanometer Sized Rare Earth Chalcogenide Clusters: Synthesis,Characterization, and Chemical Reactivity Studies

纳米级稀土硫族化物簇：合成、表征和化学反应性研究

• 批准号: 9204160
• 负责人: John Brennan
• 金额: $ 25.07万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-01 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9204160&HistoricalAwards=false
• 关键词: Nanometer; Sized; Rare; Earth; Chalcogenide

/his award is made by the Office of Special Projects in the Chemistry Division under the Materials Synthesis and Processing Initiative. This research will explore the relationships between the properties of molecular, colloidal and solid state rare earth selenides and tellurides. New organo-rare earth compounds will be prepared and characterized in order to understand the fundamental aspects of bonding in rare earth coordination chemistry. These compounds will be thermolyzed at low temperatures into both nanometer-sized clusters and solid state compounds in order to examine the unique optical and magnetic properties of these semiconducting materials. Rare earth nanoclusters will be characterized by NMR and transmission electron microscopy to document the evolution of size-dependent structural, electronic and magnetic properties. Once the fundamental properties of these materials have been outlined, the chemical properties responsible for cluster stability and particle size distribution can be determined. %%% This low temperature approach to rare earth chalcogenides may afford the possibility of isolating metastable solid state compounds which would be unable to withstand the high temperatures associated with conventional solid state synthesis.

/他的奖项是由特别项目办公室在 材料合成与加工化学部 倡议本研究将探讨 分子、胶体和固体的性质之间 稀土硒化物和碲化物。新型有机稀土 将制备和表征化合物，以便 了解稀土元素成键的基本方面 配位化学这些化合物将在 在低温下形成纳米级的团簇和固体 状态化合物，以检查独特的光学和 这些半导体材料的磁性。 罕见 地球纳米团簇将通过NMR表征， 透射电子显微镜记录的演变 尺寸依赖的结构、电子和磁性。 一旦这些材料的基本性质被 概述了负责簇的化学性质， 可以测定稳定性和粒度分布。 %%% 稀土硫属化物的这种低温方法可以 提供了分离亚稳固态的可能性 化合物将无法承受高 与常规固态合成相关的温度。