田原分子分光研究室 Molecular Spectroscopy Laboratory


Photochemical reaction dynamics at interfaces

Photochemical reaction dynamics at interfaces

Heterogeneous chemical reactions, such as heterogeneous catalytic reactions and atmospheric chemical reactions, proceed only at interfaces. Thus, in-situ observations of interfacial reactions are curtail for elucidating heterogeneous chemical reactions. We have developed UV-excited time-resolved HD-VSFG spectroscopy and apply this technique for investigation of chemical reactions at interfaces. For the first time, it was found that there exist half-hydrated electrons at the air/water interface after the UV-irradiation of water. We are now trying to reveal more complex chemical reactions at interfaces.
Mohammed (Matsuzaki, Kusaka)

Fig. 1. Schematic model of half hydrated electron at the air/water interface. Electrons are delocalized as depicted by the black cloud. The hydrated electrons at the interface escape into bulk phase with 100 ps time-scale.