Synthesis and Properties of Ternary Metal Pnictides and Pnictide Oxides

9505565 Kauzlarich本研究涉及过渡金属烟酸和烟酸氧化物化合物的合成和表征。重点抓好第一排过渡金属砷、锑、铋等重主族致癌物与碱、碱土、稀土金属的组合。Zintl概念将用于指导新化合物的合成。本研究的目的之一是合成新的A++(MX)-型三元化合物，其中M为过渡金属，A为碱金属或碱土金属，X为半金属或主族元素。如果d电子定域在金属上并且成键描述保持不变，这些新化合物可以被认为是锌化合物。这种合成新化合物的策略对固态化学来说是独一无二的，是一种定向合成努力。此外，还将合成并表征过渡金属烟酸盐氧化物。与大多数含有尼古丁和氧原子的化合物不同，在这些化合物中，两者之间没有成键作用。它们是层状材料，人们可能会期望找到与以这种结构类型结晶的化合物相关的独特性质。新化合物将通过粉末和单晶X射线和/或OP中子衍射、电阻率随温度的变化、磁化强度随场和温度的变化、热重分析、差热分析、EPR、IR和UV-Vis光谱进行表征。这个项目将导致合成可能具有新的磁性和电子性能的新化合物，并将扩大关于锌化合物和金属间化合物界面材料的结构、性能和成键的知识。此外，还将研究结构与性质的关系。对三元过渡金属化合物的研究将为开发具有新性质的固体材料提供新的视角。尼古丁氧化物是一小类到目前为止还没有得到很好表征的化合物。

9505565 Kauzlarich This research is concerned with the synthesis and characterization of transition metal pnictide and pnictide oxide compounds. Efforts will be focused on the combination of the heavy main group pnictogens such as arsenic, antimony and bismuth, the first row transition metals, and the alkali, alkaline earth, and rare earth metals. The Zintl concept will be used to direct the synthesis of new compounds. One objective of this research is to synthesize new ternary compounds of the type A+ + (MX)- , where M is a transition metal, A = alkali or alkaline earth metal, and X = semimetal or main group element. These new compounds can be considered Zintl compounds if the d electrons are localized on the metal and the bonding description remains the same. This strategy for the synthesis of new compounds is unique to solid-state chemistry and is a directed synthetic effort. In addition, transition metal pnictide oxides will be synthesized and characterized. Unlike most compounds containing a pnictogen and oxygen atom, there is no bonding interactions between the two in these compounds. They are layered materials and one might expect to find unique properties associated with compounds that crystallize in this structure type. New compounds will be characterized by powder and single crystal x-ray and/op neutron diffraction, resistivity versus temperature, magnetization versus field and versus temperature, thermogravimetric analysis, differential thermal analysis, epr, IR and UV-vis spectroscopy. %%% This project will result in the synthesis of new compounds that may exhibit novel magnetic and electronic properties and will expand the knowledge concerning structure, properties, and bonding of materials at the interface between Zintl compounds and intermetallics. In addition, structure-property relationships will be studied. Research on ternary transition metal pnictides will provide new insight on the development of solids with novel properties. Pnictide Oxides are a small class of compounds that have not been well characterized to date.