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

将开发低温(低于500摄氏度)拓扑定向合成策略，以指导新固态材料的制备，以包括层状氧化物主体中的金属-阴离子阵列。还原和氧化插层、离子交换以及在某些情况下的脱嵌反应的组合将被用来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处理上，在此过程中，拓扑化学方法的顺序应用将导致新的层状产品。将探索允许通过单个主体交替构建具有不同成分、不同厚度、混合价态以及不同层类型的层的特定策略。这些方法将被用来生产具有显著结构、磁性和电子性能的新材料。更多的努力将包括制造新的层状氧卤化物宿主，这些宿主可以接受拓扑化学操作。%这个项目的目标是产生广泛的科学和教育影响。在科学影响方面，这将随着一系列延长的低温反应策略的发展而被长期看到。设想了一个全面的反应库，它将允许定向、合理地合成具有特定结构、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出合成有机化学家目前拥有的能力。在教育影响方面，这里的努力将集中在对学生的培训和向当地社区的介绍上。本科生和研究生将参与本项目研究的各个方面。这一经验将为他们在新材料的合成和表征以及科学数据的介绍和出版方面提供宝贵的培训。这一组成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一级促进固体化学。最后，为了向当地社区的非科学家交流固体和材料化学的主题，将访问大新奥尔良地区的公立学校(K-12)，就与固体和材料化学有关的概念进行讲座和演示。

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.