Kinetics of Solid State Chain Reactions

在化学系物理化学计划的这个项目中，犹他州大学的鬼魂教授将利用傅里叶变换红外光谱实时测量低温基质中的固相链反应速率。涉及乙烯或甲基环丙烷的氯原子-碳氢链反应将由激光光解引发，并作为温度和试剂相对浓度的函数进行监测。这些反应是在低温(10-100K)下由试剂气相沉积形成的薄固体薄膜的紫外激光光解引发的。在浓缩、无序的环境中，链式反应的动力学研究还处于起步阶段。该项目中进行的实验将有助于更深入地了解自由基在严重限制旋转和平移扩散的环境中的反应过程，并将影响各种技术，包括聚合物和先进复合材料的合成。

In this project in the Physical Chemistry Program of the Chemistry Division, Professor Wight of the University of Utah will measure the rates of solid-state chain reactions in low temperature matrices in real time using FTIR spectroscopy. Chlorine atom-hydrocarbon chain reactions involving ethylene or methylcyclopropane will be initiated by laser photolysis and monitored as a function of temperature and relative concentration of reagents. These reactions are initiated by ultraviolet laser photolysis of thin solid films formed by vapor deposition of the reagents at cryogenic temperatures (10-100 K). %%% Kinetic studies of chain reactions in condensed, disordered environments are in their infancy. The experiments conducted in this program will lead to a deeper understanding of reactive processes of free radicals in environments that severely restrict rotational and translational diffusion and will impact a wide variety of technologies, including synthesis of polymers and advanced composite materials.