Discrete and Extended Arrays of Main Group Elements and Transition Metals

主族元素和过渡金属的离散和扩展阵列

• 批准号: 9983352
• 负责人: Kenton Whitmire
• 金额: --
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-09-01 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9983352&HistoricalAwards=false
• 关键词: Discrete; Extended; Arrays; Main; Group

With this award, the Inorganic, Bioinorganic, and Organometallic Chemistry Program supports research by Kenton H. Whitmire, Department of Chemistry, Rice University, on clusters of main group elements (E) and transition metals (M). New techniques will be used to synthesize large, novel E-M cluster compounds with new bonding and reactivity characteristics. Heavy p-block elements often form unusual compounds because of their size, Lewis acid-base properties, metallic character and relativistic effects. The high-pressure synthesis will be monitored by infrared spectroscopy in a specially designed cell. The bonding will be analyzed in collaboration with Dr. Jean-Yves Saillard of the Universite de Rennes, France. The compounds will be characterized using x-ray diffraction, NMR and IR spectroscopies, and magnetic susceptibility. In addition, the catalytic activity of the M3E family of cluster compounds will be studied by in situ analysis of the kinetics and mechanism of carbonylation and hydrogenation reactions. The role of the main group element is of particular interest. The high-pressure reactor used in the synthetic studies will be used in this investigation to monitor the effects of cluster composition, reactant gas pressure, and solvent and ion pairing on cluster stability.The interaction of main group elements and transition metals is important in chemistry, materials science and catalysis. Alloys containing elements of the p- and d- blocks have interesting electronic and magnetic properties. Understanding how these different elements form structures, bond, and react is important in characterizing discrete compounds and also in extended solid state phases. For the first time, both formation of these elements into large clusters and their behavior in catalytic reactions will be studied in detail in real time. Graduate and undergraduate students would learn how to integrate experimental and theoretical results.

凭借该奖项，无机、生物无机和有机金属化学项目支持莱斯大学化学系 Kenton H. Whitmire 关于主族元素 (E) 和过渡金属 (M) 簇的研究。新技术将用于合成具有新键合和反应特性的大型新型 E-M 簇化合物。由于其尺寸、路易斯酸碱性质、金属特性和相对论效应，重 p 区元素经常形成不寻常的化合物。 高压合成将在专门设计的单元中通过红外光谱进行监测。将与法国雷恩大学的 Jean-Yves Saillard 博士合作分析这种结合。这些化合物将使用 X 射线衍射、核磁共振和红外光谱以及磁化率进行表征。此外，还将通过原位分析羰基化和氢化反应的动力学和机理来研究M3E簇化合物家族的催化活性。主族元素的作用特别令人感兴趣。本研究将使用合成研究中使用的高压反应器来监测团簇组成、反应气体压力以及溶剂和离子配对对团簇稳定性的影响。主族元素和过渡金属的相互作用在化学、材料科学和催化中非常重要。含有 p 区和 d 区元素的合金具有令人感兴趣的电子和磁性特性。了解这些不同元素如何形成结构、键合和反应对于表征离散化合物以及扩展固态相非常重要。 首次实时详细研究这些元素形成大团簇的过程及其在催化反应中的行为。 研究生和本科生将学习如何整合实验和理论结果。