Catalytic Control of the Kinetics of Sol-Gel Ceramic Synthesis: Research Initiation Award

这项工作的最终目的是提供一个系统的和定量的模型，可以用来设计从有机金属前体溶液合成金属氧化物。在目前的工作中，核磁共振（NMR）光谱与色谱和固体表征相结合，以了解溶胶-凝胶合成中涉及的关键化学反应的动力学细节，作为（电解质）催化剂性质和浓度的函数。活性剂结构、溶剂性质、反应可逆性、扩散限制和多组分反应也被讨论。获得的数据被纳入现有的溶胶-凝胶反应的定量模型。原则上，利用溶胶-凝胶陶瓷合成技术，将溶液中的有机金属原体聚合成金属氧化物，可以制造出具有特定化学性质、形状或机械行为的陶瓷、玻璃和凝胶。这种能力的实现取决于对这些系统的化学性质的定量理解的提高。

The ultimate objective of this work is to provide a systematic and quantitative model that can be used to engineer the synthesis of metal oxides from solutions of organometallic precursors. In the present work, nuclear magnetic resonance (NMR) spectroscopy is coupled with chromatography and solids characterization to learn details of the kinetics of the key chemical reactions involved in sol-gel synthesis as functions of the nature and concentration of the (electrolyte) catalyst. Teactant structure, solvent properties, reaction reversibility, diffusion limitations, and multicomponent reactions are also addressed. Data obtained are incorporated into existing quantitative models of sol-gel reactions. In principle, ceramics, glasses and gels can be made with tailored chemical properties, shape or mechanical behavior using sol-gel ceramic synthesis technology, in which organometallic procursos in solution are polymerized to metal oxides. Realization of this capability depends upon improved quantitative understanding of the chemistry of these systems.