Study of the dynamics of photo-excited high-spin pai-radicals toward molecular spintronics
| Project/Area Number |
24350076
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Functional materials chemistry
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| Research Institution | Osaka City University |
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Principal Investigator |
Teki Yoshio 大阪市立大学, 大学院理学研究科, 教授 (00180068)
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| Co-Investigator(Kenkyū-buntansha) |
HIROTSU MASAKAZU 大阪市立大学, 大学院理学研究科, 准教授 (30312903)
ITO AKITAKA 大阪市立大学, 大学院理学研究科, 助教 (20708060)
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2013: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Fiscal Year 2012: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
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| Keywords | 光励起状態 / スピンダイナミックス / πラジカル / 光耐久性 / ペンタセン / 高スピン状態 / 原子価互変異性 / スピントロニクス / 励起状態ダイナミクス / ビラジカル / 発光挙動変化 / 高スピンπラジカル / 安定ラジカル / 励起高スピン状態 / スピン整列 / 時間分解ESR / LIESST |
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| Outline of Final Research Achievements |
In this project, the following scientific achievements were obtained. A new photo-stabilization method of acene derivatives utilizing stable radical was discovered. Thus, a combination of two unstable species (photo-reactive pentacene and radical) led to remarkable photo-stability enhancement and the solubility enhancement in organic solvents. To clarify the mechanism of the photo-stability enhancement, excited-state dynamics of the pentacene derivatives having stable radical substituents were investigated by using the transient absorption measurements. The derivatives showed ultrafast formation of triplet excited state in the pentacene moiety from photoexcited singlet state owing to the contributions of enhanced intersystem crossing and singlet fission.
In addition, we also obtained some new results concerned with the excited-state spin dynamics of radicals. Furthermore, the magnetic and optical properties of Co complexes with radical ligands were also investigated.
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Report
(5 results)
Research Products
(48 results)
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[Presentation] Using Excited-State Spin Dynamics of π-Radical Toward Organic Spintronics2014
Author(s)
Y. Teki, A. Shimizu, N. Kishida, A. Ito, Y. Kawanaka, T. Matsumoto, Y. Takemoto, T. Shinada, D. Kosumi, and H. Hashimoto
Organizer
The 14th International Conference on Molecule-Based Magnets
Place of Presentation
Saint Petersburg, Russia
Year and Date
2014-07-05 – 2014-07-10
Related Report
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