CAREER: Solid State Chemistry of Unusual Zintl Phases and Polar Intermetallics

9733587古罗伊是这项建议的研究部分，其目的是研究如何调整锌相和层状金属间氧化物的电子结构和性质。研究计划概述了独特的战略：1)应用和评估Zintl概念及其在合成“缺电子”Zintl相--一类新的无机pi系统--方面的局限性；2)通过采用合理的积木-块-多层方法，利用层状金属间化合物和氧化物结构，设计和合成新的复杂的层状金属间氧化物共生结构。由于在正常的锌相和极性金属间化合物中已经表现出独特的结构和性能，可以预见探索性的合成和表征将产生不寻常的晶体化学和新的物理性能。这些不同寻常的材料代表了一类很有前途的电子和磁性材料，具有从半导体、热电、超导体到巨磁电阻的潜在性质。这项研究的总体目的是建立有用的结构(化学键)-性质关系，并提高我们对金属和非金属之间区域的化学理解。这项建议的教育计划包括开发研究生和本科课程，强调材料化学、无机固态化学和元素的描述化学的重要性。本科生和研究生培训将通过与其他教育机构和工业研究团体的合作活动来补充。合成新材料以及了解、控制和预测固体的结构和性能的挑战继续推动着对与工业部门相关的新技术材料的探索。新材料类别的发现，如Zintl化合物，以及对其不同性质的更深入了解，以及它们的开发和应用的影响，构成了在这一固体化学和材料科学的前沿领域开展本科生教育活动的基础。***

9733587 Guloy The research component of this proposal aims to investigate ways to tune the electronic structure and properties of Zintl phases and layered intermetallic oxides. The research plan outlines unique strategies to: 1) apply and assess the Zintl concept and its limits to the synthesis of `electron-deficient' Zintl phases - a new class of inorganic pi-systems; 2) design and synthesize new complex layered intermetallic-oxide intergrowth structures by using layered intermetallic and oxide structures in a rational building-block-multilayer approach. Since unique structures and properties are already apparent in normal Zintl phases and polar intermetallics, it is anticipated that exploratory synthesis and characterization will produce unusual crystal chemistry and novel physical properties. These unusual materials represent a promising class of electronic and magnetic materials with potential properties ranging from semiconductors, thermoelectrics, superconductors and giant magnetoresistance. The general aim of this research is to establish useful structure(chemical bonding)-property relationships and to improve our chemical understanding of the region between metals and nonmetals. The educational plan of this proposal includes the development of courses in graduate and undergraduate levels that will emphasize the importance of materials chemistry, inorganic solid state chemistry, and descriptive chemistry of the elements. Undergraduate and graduate training will be supplemented by collaborative activities with other educational institutions and industrial research groups. %%% The challenge to synthesize new materials and understand, control and predict the structures and properties of solids continues to fuel the search for new technological materials of relevance to the industrial sector. The discovery of new classes of materials such as the Zintl compounds, together with a deeper understanding of their diverse properties, and the impact of their development and application forms the basis for undergraduate eductaion activities being developed in this cutting-edge area of solidstate chemistry and materials science. ***