| Project/Area Number |
10554028
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 展開研究 |
|---|
| Research Field |
Physical chemistry
|
|---|
| Research Institution | TOHOKU UNIVERSITY |
|---|
Principal Investigator |
MIKAMI Naohiko Graduate School of Science, Tohoku Univ., Professor, 大学院・理学研究科, 教授 (70004447)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ABE Naomichi Device R&D Division, Fujitsu Co., Chief Project Leader, デバイス開発部, 開発部・部長(研究職)
FUJI Asuka Graduate School of Science, Tohoku Univ., Research Associate, 大学院・理学研究科, 助手 (50218963)
安部 直道 富士通株式会社, デバイス開発部, 開発部・部長(研究職)
|
|---|
| Project Period (FY) |
1998 – 1999
|
| Project Status |
Completed (Fiscal Year 1999)
|
| Budget Amount *help |
¥11,800,000 (Direct Cost: ¥11,800,000)
Fiscal Year 1999: ¥4,900,000 (Direct Cost: ¥4,900,000)
Fiscal Year 1998: ¥6,900,000 (Direct Cost: ¥6,900,000)
|
|---|
| Keywords | Laser spectroscopy of mass-selected molecular ions / Ion trap method / Cluster structure / Vibrational spectroscopy of molecular ions / Intramolecular hydrogen bond / クラスターサイズ選別振動分光 / 水素結合クラスター / ナフトール / 2・ピリドン互変異性 / イオン種の新振動分光法 / O・クレゾール |
|---|
| Research Abstract |
We have developed a new equipment for spectroscopic measurements of size-selected molecular cluster ions, as well as molecular fragment ions. The setup consists of a supersonic molecular beam source, and ionization section, a Q-pole mass filter for size-selection, an ion trap cell combined with laser photodissociation section, and a second Q-pole mass analyzer with a ion detector. With this setup, spectroscopic measurements for electronic and vibrational transitions of cations can be performed.
Major results at the present stage of the project are the following :
1. A new infrared (IR) spectroscopic technique for jet-cooled molecular cations is developed. The method involves two-color laser excitation via neural excited state to high Rydberg states, vibrational excitation of its ion core with IR light, and vibrational autoionization of the ion core. It has been applied for the several compounds ;
(1) Observation of OH stretching vibrations of substituted phenol cations to investigate intramolecular hydrogen bonds in ionic states.
(2) Observation of CH stretching vibrations of aromatic hydrocarbon cations to study the inaccessible vibrational levels with conventional methods.
2. IR-UV double resonance spectroscopy of size-selected molecular clusters is established for the investigation of their intermolecular binding structures in combination with ab initio quantum mechanical calculations.
(1) Vibrational spectroscopy and cluster structures of 2-pyridone and its clusters.
(2) Structure and vibrational relaxation of benzonitril clusters with various molecules.
(3) Structural investigations of benzyl alcohol rotomers and of its water solvated clusters.
|
