US-UK Cooperative Research: Study of Intercalated Low Dimensional Solids by X-Ray Absorption ESR and NMR Spectroscopy

美英合作研究：通过 X 射线吸收 ESR 和 NMR 光谱研究插层低维固体

• 批准号: 8922483
• 负责人: Juana Acrivos
• 金额: $ 1.41万
• 依托单位: San Jose State University Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-05-01 至 1994-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8922483&HistoricalAwards=false
• 关键词: US; UK; Cooperative; Research; Study

This award will support collaborative research in solid state chemistry between Dr. Juana Acrivos, San Jose State Univesity and Dr. Y. W. Liang, Director, IRC Laboratory for Supercon- ductivity, Cambridge University, U.K. The project involves the investigation of the effects that the composition (as varied by intercalation) has on the properties of low dimensional solids. The objective of the research is to prepare new materials with special properties. The products obtained by interca- lation reactions are usually materials containing the same element with multiple valence; this property is evident in electron spin resonance (ESR), nuclear magnetic resonance (NMR), X-ray absorption spectroscopy (XAS) measurements and electronic and vibrational spectra. For superconductors, the investigators have developed a new technique of rf power dissipation measurements. The systems under investigation include metal in ammonia solutions near the metal to insulator transition and compounds containing the same element in at least two different valence states. Of great interest today are the low dimensional superconducting solids containing the same element in multiple valence states, e.g., intercalated layer materials where there is partial charge transfer from the host to the adduct, one dimensional organic conductors and ceramic high temperature superconductors. All these materials are important in the elucidation of the role that structure plays on oxidation-reduction mechanisms. These materials are used for developing high duty batteries, catalysts, solid lubricants and new types of conductors. The project will benefit from the complementary expertise of the two investigators and well as their past history of fruitful collaboration. Dr. Acrivos is considered one of the world leaders in research on the chemistry and electronic properties of low-dimensional solids.

该奖项将支持圣何塞州立大学的 Juana Acrivos 博士和英国剑桥大学 IRC 超导实验室主任 Y.W.Liang 博士在固态化学方面的合作研究。该项目涉及研究成分（因插层而变化）对低维固体性质的影响。 研究的目的是制备具有特殊性能的新材料。 插层反应得到的产物通常是含有多价同种元素的物质；这种特性在电子自旋共振 (ESR)、核磁共振 (NMR)、X 射线吸收光谱 (XAS) 测量以及电子和振动光谱中很明显。 对于超导体，研究人员开发了一种射频功率耗散测量新技术。 正在研究的系统包括接近金属到绝缘体转变的氨溶液中的金属以及含有至少两种不同价态的相同元素的化合物。 如今，人们非常感兴趣的是含有多价态相同元素的低维超导固体，例如，部分电荷从主体转移到加合物的插层材料、一维有机导体和陶瓷高温超导体。 所有这些材料对于阐明结构在氧化还原机制中的作用都很重要。 这些材料用于开发高功率电池、催化剂、固体润滑剂和新型导体。该项目将受益于两位研究人员的互补专业知识以及他们过去卓有成效的合作历史。 Acrivos 博士被认为是低维固体化学和电子特性研究领域的世界领先者之一。