| Project/Area Number |
15550002
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical chemistry
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| Research Institution | Tohoku University |
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Principal Investigator |
FUJIMURA Yuichi Tohoku University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (90004473)
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| Co-Investigator(Kenkyū-buntansha) |
MANZ John ベルリン自由大学, 化学科, 教授
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| Project Period (FY) |
2003 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2004: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2003: ¥2,400,000 (Direct Cost: ¥2,400,000)
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| Keywords | molecular motor / chirality / quantum control / coherent control / chiral molecule / pulse laser / rotational motion / 光駆動モーター / 分子ローター / ポンプ-ダンプ法 |
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| Research Abstract |
The main issues of this research project are to establish a theory of laser-induced molecular motors, and propose scenarios of their unidirectional motions. Our research works were concerned with two subjects : one was to propose a scheme of molecular motors driven in femtosecond time regime, and the other is to propose motors with rotational motions as quickly as possible. For the purpose of the first subject, a femotosecond pump-dump pulse excitation method was applied to a chiral molecular motor. That is, a rotational wave packet is created in an electronic excited state by a pumping pulse. The rotational wave packet is transferred to the ground state. We have shown by simulations that the unidirectional motion is determined by -analyzing time-resolved ionization spectra of motors. For the purpose of the other subject, a cis-trans isomerization of a molecule was considered as a model system. A unidirectional rotational motion with angular quantum number of 〜 100 in unit of Planck constant was created by an IR-UV sequential excitation. The quantum number is one-order high compared with that reported so far. It is also shown that unidirectional rotational motions of a chiral molecular motor are controlled by using laser pulses whose pulse shapes are designed by a quantum control method.
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