| Project/Area Number |
11223204
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas (B)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | UNIVERSITY OF TOKYO |
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Principal Investigator |
AIDA Takuzo University of Tokyo, Grad. School of Eng., Prof., 大学院・工学系研究科, 教授 (00167769)
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| Co-Investigator(Kenkyū-buntansha) |
江 東林 東京大学, 大学院・工学系研究科, 助手 (40302765)
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| Project Period (FY) |
1999 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥34,000,000 (Direct Cost: ¥34,000,000)
Fiscal Year 2001: ¥10,200,000 (Direct Cost: ¥10,200,000)
Fiscal Year 2000: ¥10,700,000 (Direct Cost: ¥10,700,000)
Fiscal Year 1999: ¥13,100,000 (Direct Cost: ¥13,100,000)
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| Keywords | Dendrimer / Porphyrin / Light-Harvesting Antenna / Artificial Photosynthesis / Energy Migration / 光捕集アンテナ機能 / ポロフィリン / デントリマー / 分子内エネルギー移動 / 協同作用 / 光エネルギー変換 / 光励起エネルギー貯蔵 |
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| Research Abstract |
The following information was obtained through researches in three years.
1 Excitation energy absorbed at peripheral aromatic groups was transmitted to the porphyrin at the center of the dendrimer in 80% of the high efficiency. The efficiency decreased to less than 30% of the globular dendrimer when the morphology of the dendrimer was non-globular. High-speed migration of excitation energy between dendrons was suggested from the measurement of fluorescence anisotropy.
The energy of visible light absorbed into the dendrimers composed from porphyrins also transferred to the focal point more than 70%. Similar conclusion as 1 was obtained from the morphology dependency of the energy transfer efficiency and the measurement of fluorescence anisotropy.
One of the general guidelines for highly efficient energy funneling was the design of spherical orientation of photofunctional molecules and the high utility of dendrimers was demonstrated.
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