An infrared spectroscopic study on CH/π Ieractions in molecular clusters
| Project/Area Number |
14540462
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Physical chemistry
|
|---|
| Research Institution | Tohoku university |
|---|
Principal Investigator |
FUJII Asuka Tohoku university, Graduate School of Science, Research Associate, 大学院・理学研究科, 助手 (50218963)
|
|---|
| Project Period (FY) |
2002 – 2003
|
| Project Status |
Completed (Fiscal Year 2003)
|
| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 2003: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2002: ¥2,800,000 (Direct Cost: ¥2,800,000)
|
|---|
| Keywords | CH / π interaction / infrared spectroscopy / cluster / intermolecular interaction / hydrogen bond / dispersion force / acetylene / benzene / CH-π相互作用 / 赤外分光法 / 二重共鳴法 |
|---|
| Research Abstract |
CH stretching vibrations of jet-cooled benzene-acetylene and several aromatics-acetylene clusters were observed for the characterization of the intermolecular interaction, so-called activated CH/π interaction between the acidic CH group and π-electrons, under the well-defined condition. The infrared-ultraviolet double resonance spectroscopic techniques were used to measure Infrared spectra of the jet-cooled clusters. The antisymmetric CH stretching vibration of the acetylene moiety exhibits substantial low-frequency shifts upon the cluster formation with the aromatic molecules, indicating such cluster structures that acetylenic CH Is bound to the π-electrons of the aromatic ring. The magnitude of the low-frequency shifts Increased with increase of the π-electron density of the ring, as expected for an ordinary π-hydrogen bond. On the other hand, the polarizability of the proton accepting molecules showed a weakly negative correlation with the CN frequency shifts.
|
Report
(3 results)
Research Products
(17 results)
