Group 13 Chalcogenides: Molecules and Materials

该奖项由化学特别项目办公室颁发。 支持安德鲁巴伦博士在 莱斯大学。研究将集中在前体的作用 13-16族化学气相沉积过程中的分子结构 材料和新的13族硫属化物的合成和反应性 化合物. 在发现亚稳固相可以在 从稳定的笼状结构中间体，条件将是 研究了在气相中保留笼状结构的方法。本 最后，将建立一个气溶胶CVD系统， 分解具体地，本发明涉及的是以下化合物的环状和笼状有机金属络合物： 镓和铟，硫化物，硒化物和碲化物的合成 并在设计的条件下分解，以保持结构 前体的完整性，新相的特征将通过俄歇 光谱、XPS、TEM、SEM、X射线衍射和电子衍射。 相生长的机理研究将遵循飞行时间 质谱和分解产物的基质分离。 其他研究将调查硫化镓笼的使用， 用于扩展中间相结构的分子结构单元及其用途 作为铝氧烷模型的笼状硫化镓结构的齐格勒 聚合法 第13-16族硫属化物的基本化学不太好 开发比相应的氧化物这项研究将定义 设计和合成新的结构和动力学要求 用于化合物半导体、催化和 多孔类沸石材料。

This award is made in the Office of Special Projects of the Chemistry Division in support of the continuing research of Dr. Andrew Barron at Rice University. The research will focus on the role of precursor molecular structure during chemical vapor deposition of Group 13-16 materials and the synthesis and reactivity of new Group 13-chalcogenide compounds. Having discovered that metastable solid phases can be formed from stable cage structure intermediates, conditions will be investigated which retain the cage structure in the gas phase. To this end, an aerosol-CVD system will be built which will eliminate gas phase decomposition. Specifically, cyclic and cage organometallic complexes of gallium and indium, sufides, selenides and tellurides will be synthesized and decomposed under conditions designed to preserve the structural integrity of the precursors, New phases will be characterized by Auger spectroscopy, XPS, TEM, SEM, x-ray diffraction and electron diffraction. Mechanistic studies of phase growth will be followed by time-of-flight mass spectrometry and matrix isolation of the decomposition products. Other studies will investigate the use of gallium-sulfide cages as molecular building blocks for extended mesophase structures and the use of caged gallium sulfide structures as models for alumoxanes in Ziegler polymerization. The fundamental chemistry of Group 13-16 chalcogenides is less well developed than the corresponding oxides This research will define the structural and kinetic requirements for the design and synthesis of new solid phases for applications in compound semiconductors, catalysis, and porous zeolite-like materials.