| Project/Area Number |
07554038
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (A)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 展開研究 |
|---|
| Research Field |
分離・精製・検出法
|
|---|
| Research Institution | Osaka University |
|---|
Principal Investigator |
WATANABE Iwao Graduate School of Science, Osaka University, Associate Professor, 大学院・理学研究科, 助教授 (50028239)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
WATARAI Hitoshi Graduate School of Science, Osaka University, Professor, 大学院・理学研究科, 教授 (30091771)
文殊四郎 秀昭 大阪大学, 理学部, 助手 (80191071)
|
|---|
| Project Period (FY) |
1995 – 1997
|
| Project Status |
Completed (Fiscal Year 1997)
|
| Budget Amount *help |
¥16,800,000 (Direct Cost: ¥16,800,000)
Fiscal Year 1997: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1996: ¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 1995: ¥12,600,000 (Direct Cost: ¥12,600,000)
|
|---|
| Keywords | photoelectron emission spectroscopy / surface analysis / surface activity / solvation structure / vacuum ultraviolet spectroscopy / air / liquid interface / 液 界面 |
|---|
| Research Abstract |
1. There exist almost no ways to analyze the solvation structures of molecules and ions at the air/solution interface. The present project aims to detect and analyze the surface species by photoelectron emission spectroscopy. It utilizes monochromatic 6-10eV photons to irradiate the surface and detects photoelectrons emitted from the solution surface. The threshold photon energy to produce the photoelectrons corresponds to the ionization potential of the surface species. From the ionization potential one is able to discuss the solvation structure and from the photoelectron current the surface concentration.
2. Some tetraalkylammonium ions were used to segregate halide anions to the surface. The present technique successfully detected the surface accumulation of halide anions.
3. The halide anions segregated to the surface by large tetraalkylammonuim cations have smaller ionization potentials compared to that of anions with surface inactive counter cations. Tetrabutylammonium iodide solution showed stepwise decrease of ionization potential with the increase of bulk concentration. This must be indicating the stepwise dehydration of iodide anion at the solution surface.
|
