Directed Synthesis Using Zintl Ion Building Blocks

科罗拉多州立大学化学系Peter K.Dorhout博士获得了化学部无机、生物无机和有机金属项目的支持，该项目获得了学院早期职业发展奖，以研究锌离子构建块在材料合成中的使用。镧系锌离子材料将使用积木概念来合成，其中已知的锌相结构将作为新材料的前体和反应物进行研究。在中等温度下，熔盐反应将合成新的稀土元素亚硒二磷酸和硒锑酸盐化合物。这些材料有望表现出热电和/或反铁磁行为，这些性质和它们的理论基础将被研究。该教育计划旨在开发新的X射线衍射和热分析实验室实验，一门新的固体化学课程，以及一项本科研究计划。元素周期表不同部分元素的独特组合可以产生具有新的有用性质的固态材料。这些类型的材料的合成通常是以经验的、反复试验的方式通过在高温下结合元素来进行的。这一建议以系统和合理的积木方法将锌离子、带负电荷的主族元素团簇与稀土金属结合在一起。这种方法的目的是开发获得这些材料的低温合成路线，并从根本上了解这些材料观察到的物理性质的基础。这些材料可能具有独特的导电和磁性，在合成方法和对这些系统的理论理解方面的进步将使设计具有可预测的物理性能的新材料成为可能。教育计划的重点是课程开发、学生指导和研究。

Dr. Peter K. Dorhout, Department of Chemistry, Colorado State University, is supported by the Inorganic, Bioinorganic, and Organometallic Program of the Chemistry Division under a Faculty Early Career Development Award for studies of the use of Zintl ion building blocks in material synthesis. Lanthanide Zintl ion materials will be synthesized using a building block concept whereby known Zintl phase structures are examined as precursors to and reactants for new materials. New lanthanide selenodiphosphate and selenoantimonate compounds will be prepared from molten salt reactions at moderate temperatures. These materials are expected to show thermoelectric and/or antiferromagnetic behavior, and these properties and their theoretical basis will be examined. The educational plan is aimed at developing new laboratory experiments in X-ray diffraction and thermal analysis, a new course in solid state chemistry, and an undergraduate research program. Unique combinations of elements from various portions of the periodic table can result in solid state materials with new and useful properties. The synthesis of these types of materials is frequently approached in an empirical, trial-and-error fashion by combining the elements at high temperature. This proposal combines Zintl ions, negatively charged clusters of main group elements, with lanthanide metals in a systematic and rational building block approach. This approach is aimed at developing low temperature synthetic routes to these materials, and a fundamental understanding of the basis for the observed physical properties of these materials. These materials may posess unique conducting and magnetic properties, and the advances in synthetic methodology and in the theoretical understanding of these systems will allow for the design of new materials with predictable physical properties. The educational plan focuses on curriculum development, student mentoring, and research.