Engineering Research Equipment: Time-Resolved Fluorescence Spectrometer

摘要- Brennecke - 9411716 这是一项设备赠款，使圣母大学化学工程系能够购买一台时间分辨荧光光谱仪，用于支持工程研究。 最初，该设备将用于研究超临界流体（SCF）中的溶剂化和反应性，具体而言：（1）使用SCF研究可逆扩散影响的反应;（2）研究动力学理论中液体中Stokes-Einstein扩散的扩散控制反应的转变以及（3）使用荧光探针研究SCF混合物中的优先溶剂化。 SCF由于其独特的物理性质可以在正常气体和液体的物理性质之间变化，因此在萃取和分离中具有多种应用。 它们还显示出用作反应溶剂的潜力;例如，使用超临界水氧化危险有机废物。 上述项目对推进这些技术很重要，因为它们涉及应用复杂的光谱技术来研究基本量，如物种的溶剂化和溶剂对反应速率的影响。 从这些实验中获得的理解将有助于预测什么反应可以从超临界条件下的操作中受益。

Abstract - Brennecke - 9411716 This is an equipment grant to enable the Chemical Engineering Department at the University of Notre Dame to purchase a Time Resolved Fluorescence Spectrometer which will be dedicated to support research in engineering. Initially, the equipment will be used to study solvation and reactivity in supercritical fluids (SCFs), specifically: (1) use of SCFs to study reversible diffusion-influenced reactions; (2) study of the transition of diffusion-controlled reactions from Stokes-Einstein diffusion in liquids in kinetic theory and (3) use of fluorescence probes to study preferential solvation in SCF mixtures. SCFs have found a variety of applications in extractions and separations because of their unique physical properties that can be varied between those of normal gases and liquids. They also show potential for use as solvents for reactions; for example, the use of supercritical water to oxidize hazardous organic wastes. The above projects are important in advancing those technologies because they involve the application of sophisticated spectroscopic techniques to study fundamental quantities, such as the solvation of species and the solvent effect on reaction rates. The understanding gained from these experiments will aid in predicting what reaction could benefit from operation at supercritical conditions.