Multistep Topotactic Reaction Strategies for the Directed Construction of Metal-Anion Arrays within Layered Oxide Hosts

在层状氧化物主体内定向构建金属阴离子阵列的多步拓扑反应策略

• 批准号: 0612544
• 负责人: John Wiley
• 金额: $ 40.31万
• 依托单位: University of New Orleans
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-15 至 2010-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0612544&HistoricalAwards=false
• 关键词: Multistep; Topotactic; Reaction; Strategies; Directed

Low temperature (less than 500 degree Centigrade) topotactic synthetic strategies will be developed to direct the preparation of new solid-state materials to include metal-anion arrays within layered oxide hosts. Combinations of reductive and oxidative intercalation, ion exchange and in some cases, deintercalation reactions will be used to build metal-anion arrays within layered oxide hosts. Emphasis will be placed on multistep reaction processing where the sequential application of topochemical methods will lead to newintricately layered products. Specific strategies will be explored that allow the construction of layers with different compositions, different thicknesses, mixed valency as well as different layer types alternating through a single host. These methods will be used to produce new materials with significant structural, magnetic, and electronic properties. Additional efforts will involve the fabrication of new layered oxyhalide hosts that are receptive to topochemical manipulation.%%%This project aims to have both a broad scientific and educational impact. In terms of the scientific impact, this will be seen in the long term with the development of an extended series of low temperature reaction strategies. A comprehensive library of reactions is envisioned that will allow for the directed, rational synthesis of new nonmolecular target compounds with specific structural, electronic and magnetic features. Such extensive capabilities would mirror those currently available to synthetic organic chemists.With respect to the educational impact, efforts here will focus on the training of studentsand presentations to the local community. Undergraduate and graduate students will be involved in all aspects of the research component of this program. This experience will provide them with valuable training in the synthesis and characterization of new materials as well as the presentation and publication of scientific data. A further aspect of this component is the involvement of international students where undergraduate and/or graduate students from France will work in the PI's laboratory; this effort will serve to promote solid-state chemistry at the international level. Finally, to communicate topics on solid state and materials chemistry to nonscientists in the local community, public schools (K-12) in the greater New Orleans area will be visited to give lectures and demonstrations on concepts pertinent to solid state and materials chemistry.

低温（低于500摄氏度）拓扑合成策略将被开发，以指导新的固态材料的制备，包括层状氧化物主体内的金属阴离子阵列。还原和氧化嵌入、离子交换以及在某些情况下脱嵌反应的组合将用于在层状氧化物主体内构建金属-阴离子阵列。重点将放在多步反应过程中的局部化学方法的顺序应用将导致newintricately分层产品。将探索特定的策略，允许构建具有不同组成、不同厚度、混合价态以及通过单个主体交替的不同层类型的层。这些方法将用于生产具有重要结构，磁性和电子特性的新材料。进一步的努力将涉及制造新的层状卤氧化物主体，这些主体接受局部化学操作。该项目旨在产生广泛的科学和教育影响。就科学影响而言，随着一系列低温反应策略的发展，这将在长期内得到体现。设想一个全面的反应库，将允许定向，合理的合成新的非分子目标化合物与特定的结构，电子和磁性功能。这种广泛的能力将反映出目前合成有机化学家所具备的能力。关于教育影响，这里的努力将集中在培训学生和向当地社区介绍情况上。本科生和研究生将参与该计划研究部分的各个方面。这一经验将使他们在新材料的合成和定性以及科学数据的介绍和出版方面得到宝贵的培训。这一部分的另一个方面是国际学生的参与，来自法国的本科生和/或研究生将在PI的实验室工作;这一努力将有助于在国际层面上促进固态化学。最后，交流固态和材料化学的主题，在当地社区的非科学家，公立学校（K-12）在大新奥尔良地区将被访问，给讲座和演示有关的概念固态和材料化学。