Building Layers within Layers - Topotactic Reaction Strategies for the Assembly of Metal-Anion Layers within Receptive Hosts

层内构建层 - 在接受宿主内组装金属阴离子层的拓扑反应策略

• 批准号: 0309972
• 负责人: John Wiley
• 金额: --
• 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: 2003
• 资助国家: 美国
• 起止时间: 2003-06-15 至 2008-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0309972&HistoricalAwards=false
• 关键词: Building; Layers; within; Topotactic; Reaction

Low temperature (less than 500 degrees Centegrade) synthetic strategies will be developed to direct the preparation of new solid-state materials. By exploiting ion exchange and intercalation methods, metal-anion layers (transition-metal halide, oxide, chalcogenide, etc.) will be assembled within receptive host compounds. Emphasis will be placed on multistep reaction processing where the sequential application of exchange/intercalation methods will lead to new intricately layered products. A complementary focus area will be the preparation of new host materials receptive to low temperature topotactic manipulation -- new layered oxide hosts based on perovskite and Sillen structure types will be sought. The detailed characterization of new compounds will be a particularly important aspect of this project. Topotactically prepared materials, as well as new hosts, are expected to demonstrate significant structural, magnetic, and electronic properties, especially in the case of mixed-valence compounds. %%%This project will 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 can be envisioned that would 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 students and 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 this research group in the 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, New Orleans public schools (K-12) 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）合成策略将被开发，以指导新的固态材料的制备。 通过利用离子交换和插层方法，金属-阴离子层（过渡金属卤化物、氧化物、硫属化物等）将在受体宿主化合物中组装。 重点将放在多步反应过程中，交换/插层方法的顺序应用将导致新的错综复杂的层状产品。 一个补充的重点领域将是制备新的主机材料接受低温topotactic操纵-新的层状氧化物主机的基础上钙钛矿和Sillen结构类型将寻求。新化合物的详细表征将是该项目特别重要的方面。拓扑结构制备的材料，以及新的主机，预计将表现出显着的结构，磁性和电子性能，特别是在混合价化合物的情况下。这个项目将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。 可以设想一个全面的反应库，这将允许定向，合理合成具有特定结构，电子和磁性特征的新的非分子目标化合物。 这种广泛的能力将反映目前合成有机化学家可用的能力。 关于教育影响，这方面的努力将侧重于培训学生和向当地社区介绍情况。 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/或研究生将在实验室的这个研究小组工作;这一努力将有助于在国际一级促进固态化学。最后，交流固态和材料化学的主题，在当地社区的非科学家，新奥尔良公立学校（K-12）将被访问给讲座和演示有关的概念，固态和材料化学。