1990 Fiscal Year Final Research Report Summary
The Generation and Reactivity of Hydrocarbon Radicals on Solid Surfaces
| Project/Area Number |
63470003
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
物理化学一般
|
|---|
| Research Institution | Tokyo Institute of Technology |
|---|
Principal Investigator |
ONISHI Takaharu Tokyo Institute of Technology, Research Laboratory of Resources Utilization, Professor, 資源化学研究所, 教授 (70011492)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
DOMEN Kazunari Tokyo Institute of Technology, Research Laboratory of Resources Utilization, Ass, 資源化学研究所, 助教授 (10155624)
|
|---|
| Project Period (FY) |
1988 – 1990
|
| Keywords | radical / infrared spectroscopy / aluminum single crystal / diiode methane / carbene / ultra high vacuum / selection rule / orientation |
|---|
| Research Abstract |
The study of CH_2I_2 adsorbed on Al (111) single crystal surface was conducted by double modulated-Fourier transform infrared reflection adsorption spectroscopy (DM-FTIRAS), low energy electron diffraction (LEED), auger electron spectroscopy (AES) and temperature programmed desorption (TPD) in ultra-high vacuum chamber. The back ground pressure was 3x10_<10> torr. By DM-FTIRAS, CH_2I_2 on clean A1 (111) at 100 K was observed. It is found that CH_2I_2 was partly reacted with Al surface to form hydrocarbon species even at 100 K. This species shows two C-H stretching bands at lower frequencies than those of molecularly adsorbed CH_2I_2. When the amount of adsorbed CH_2I_2 was increased, the amount of molecularly adsorbed CH_2I_2 increased, suggested by the intensity of asymmetric stretching of CH_2 group at ca. 3000 cm^<-1>. Further, the orientation at adsorbed CH_2I_2 was examined from the view point of selection rule of infrared absorption on metal surface. As a result it was concluded that the I-C-I plane of CH_2I_2 is parallel with Al surface and the H-C-H plane is perpendicular to the surface. This means the strong interaction of I atoms with Al atoms leads to the formation of carbene and ethylene species on the surface.
|
Research Products
(6 results)
