| Project/Area Number |
11640570
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Inorganic chemistry
|
|---|
| Research Institution | Himeji Institute of Technology |
|---|
Principal Investigator |
OZAWA Yoshiki Himij institute of Technology, Faculty of Science, Associate Professor, 大学院・理学研究科, 助教授 (40204200)
|
|---|
| Project Period (FY) |
1999 – 2001
|
| Project Status |
Completed (Fiscal Year 2001)
|
| Budget Amount *help |
¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 2001: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2000: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1999: ¥2,900,000 (Direct Cost: ¥2,900,000)
|
|---|
| Keywords | X-ray crystallography / photoexcited states / synchrotron radiation / single crystal / copper complex / multinuclear metal cluster / image plate / 光励起構造 / 単結晶X線構造解析 / 白銀複核錯体 / 多核銅錯体 / 金属-金属結合 / 低温構造解析 / 結晶構造解析 / 白金錯体 / ロジウム錯体 |
|---|
| Research Abstract |
Multinuclear Cu(I) complexes such as [Cul(py)]4 have shown luminescent by UV light irradiation. In the photoexcited states, distortion of metal cluster core has been expected. To observe this molecular distortion in the photoexcited states directly by single crystal X-ray diffraction analyses, we have performed development of a diffractometer, establishment of excited states structure refinement calculations, and survey of target compounds. Light illuminating devices has been installed in the "low-temperature vacuum X-ray camera" which are designed for obtaining low noise diffraction images at low temperature. The multiple-exposure image plate (IP) method is a new detection technique developed in this project and installed in this camera, by which both diffraction patterns measured for light irradiated and non-irradiated conditions are recorded on the same IP. The X-ray camera has settled in a Spring-8 beamline utilizing highbrilliant X-ray radiation sources. Molecular distortion in the light irradiated crystal can be detected by a differential Fourier syntheses using X-ray diffraction intensity changes between light-on and off conditions, followed by qualitative calculation of excited state population and geometrical changes in a crystal, using least square refinements. Structure analysis of a luminescent a diplatinum(II) complex (Bu_4N)_2H_2[Pt_2(pop)_4] single crystal under blue laser irradiation has been successfully performed. Photoexcited molecule of 1.4% population shows Pt-Pt bond shrinkage of 0.23 A under blue laser irradiation which is consistent with spectroscopic investigations.
|
