Dynamics and mechanism of delocalized cationic state in organic photoconductive polymers
| Project/Area Number |
23245004
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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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 | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2011-11-18 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥24,440,000 (Direct Cost: ¥18,800,000、Indirect Cost: ¥5,640,000)
Fiscal Year 2013: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
Fiscal Year 2012: ¥12,480,000 (Direct Cost: ¥9,600,000、Indirect Cost: ¥2,880,000)
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| Keywords | 光誘起電子移動 / ホール移動 / 有機光伝導体 / フェムト秒分光 / 過渡二色性 / 電荷シフト反応 / 非局在イオン状態 / 過渡吸収二色性 / 近赤外分光 / 電子移動 / 光電導 / 有機光電導体 / 非局在イオン / 光電変換 / ホール電導 / ホッピング電導 |
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| Research Abstract |
To elucidate factors enabling the rapid charge shift reaction in the charge-separated state produced by photoinduced charge separation in molecular assemblies, we have studied the electron transfer dynamics in aromatic vinyl polymer systems in solid phase where rapid charge shift reaction takes place among aromatic groups after the photoexcitation. By femtosecond transient absorption spectroscopy and dichroism measurements in the temperature range of 10 to 295 K, it was revealed that the delocalization process of the cationic state occurred among several aromatic groups very rapidly. This delocalization leads to the increase in the inter-ionic distance between the anion and the cation resulting in the reduction of the attractive Coulombic interaction and the increase in the cationic size reduces the reorganization energy. These factors facilitate the rapid charge shift reaction which has not been well accounted for by the conventional electron transfer theories.
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Report
(4 results)
Research Products
(51 results)
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[Journal Article] Constraint-induced structural deformation of planarized triphenylboranes in the excited state2014
Author(s)
T. Kushida, C. Camacho, A. Shuto, S. Irle, M. Muramatsu, T. Katayama, S. Ito, Y. Nagasawa, H. Miyasaka, E. Sakuda, N. Kitamura, Z. Zhou, A. Wakamiya, S. Yamaguchi
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Journal Title
Chem. Sci
Volume: 5
Pages: 1296-1304
Related Report
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[Journal Article] Constraint-induced structural deformation of planarized triphenylboranes in the excited state2014
Author(s)
Kushida, T. ; Camacho, C. ; Shuto, A. ; Irle, S. ; Muramatsu, M. ; Katayama, T. ; Ito, S. ; Nagasawa, Y. ; Miyasaka, H. ; Sakuda, E. ; Kitamura, N. ; Zhou, Z. ; Wakamiya, A. ; Yamaguchi, S.
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Journal Title
Chemical Science
Volume: 5
Issue: 4
Pages: 1296-1304
DOI
Related Report
Peer Reviewed
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[Journal Article] Photoinduced charge-transfer dynamics of sequentially aligned donor-acceptor systems in an ionic liquid2013
Author(s)
Muramatsu, M. ; Katayama, T. ; Ito, S. ; Nagasawa, Y. ; Matsuo, D. ; Suzuma, Y. ; Peng, L. ; Orita, A. ; Otera, J. ; Miyasaka, H.
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Journal Title
Photochemical & Photobiological Sciences
Volume: 12
Issue: 10
Pages: 1885-1894
DOI
Related Report
Peer Reviewed
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[Journal Article] Photochemistry of fac-Re(bpy)(CO)3Cl.2012
Author(s)
S. Sato, Y. Matubara, K. Koike, M. Falkenström, T. Katayama, Y. Ishibashi, H. Miyasaka, S.Taniguchi, H. Chosrowjan, N. Mataga, N.Fukazawa, S. Koshihara, K. Onda, O. Ishitani
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Journal Title
Chem. Eur. J.
Volume: 18
Issue: 49
Pages: 15722-15734
DOI
Related Report
Peer Reviewed
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[Journal Article] Metallic-Nanostructure-Enhanced Optical Trapping of Flexible Polymer Chains in Aqueous Solution as Revealed by Confocal Fluorescence Microspectroscopy2012
Author(s)
M. Toshimitsu, Y. Matsumura, T. Shoji, N. Kitamura, M. Takase, K. Murakoshi, H. Yamauchi, S. Ito, H. Miyasaka, A. Nobuhiro, Y. Mizumoto, H. Ishihara, Y. Tsu
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Journal Title
J. Phys. Chem. C
Volume: 116
Issue: 27
Pages: 14610-14618
DOI
Related Report
Peer Reviewed
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