Spectroscopic Studies of Chemical Reactions in the Solid State

摘要

Solid state chemical reactions of simple organic and inorganic ions have been studied in pressed alkali halide disks of infrared spectroscopy. These reactions were induced thermally or by irradiation with gamma rays, and then they were followed spectroscopically. In thermal decomposition reactions involving weight changes, the kinetic results obtained with these disks by infrared spectroscopy agreed with those from thermal gravimetric analysis. In gamma irradiation studies, ion free radicals were trapped readily in these disks even at room temperature, and the decay of these radicals was followed by infrared spectroscopy or by electron paramagnetic resonance spectroscopy. The concentrations of the free radicals were sufficient to determine some chemical and physical properties of these ion free radicals. The pressed disks were also found to be suitable as matrices for the study of environmental effects on the internal and external motions of the impurity ions. (Author)