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

这项工作的最终目标是提供一个系统和定量的模型，可以用来从有机金属前驱体的溶液中设计合成金属氧化物。在本工作中，核磁共振波谱与层析和固体表征相结合，详细了解了溶胶-凝胶合成中涉及的关键化学反应的动力学随(电解液)催化剂的性质和浓度的变化。还讨论了教剂结构、溶剂性质、反应可逆性、扩散限制和多组分反应。所得数据被合并到现有的溶胶-凝胶反应的定量模型中。原则上，利用溶胶-凝胶陶瓷合成技术，将溶液中的有机金属前驱体聚合成金属氧化物，可以制备出具有量身定制的化学性质、形状或力学行为的陶瓷、玻璃和凝胶。这一能力的实现依赖于对这些系统化学成分的定量理解的提高。

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.