| Project/Area Number |
13440190
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Organic chemistry
|
|---|
| Research Institution | KYOTO UNIVERSITY (2002)
Osaka University (2001) |
|---|
Principal Investigator |
IMAHORI Hiroshi Graduate School of Engineering, Professor, 工学研究科, 教授 (90243261)
|
|---|
| Project Period (FY) |
2001 – 2002
|
| Project Status |
Completed (Fiscal Year 2002)
|
| Budget Amount *help |
¥13,600,000 (Direct Cost: ¥13,600,000)
Fiscal Year 2002: ¥4,300,000 (Direct Cost: ¥4,300,000)
Fiscal Year 2001: ¥9,300,000 (Direct Cost: ¥9,300,000)
|
|---|
| Keywords | Photosynthesis / Electron Transfer / Porphyrins / Fullerenes / Ferrocenes / Transient Absorption Spectroscopy / meso, meso-Linked Porphyrins / Donor-Acceptor Linked Systems / 時間分解過度吸収分光法 / 電子スピン共鳴分光法 / エネルギー移動 |
|---|
| Research Abstract |
We have prepared ferrocene-porphyrin dimer-fullerene triad where meso, meso-linked porphyrindimer is incorporated successfully into a charge separation unit as photosynthetic multistep electron transfer model for the first time. The triad reveals photoinduced electron transfer from the porphyrin dimer excited singlet state to the C_<60>, followed by charge-shift from the ferrocene to the porphyrin dimer radical cation, to produce the ferricenium ion-C<60> radical ion pair with a high quantum yield (0.71-0.88) as well as a long-lived charge-separated lifetime (16-83 μs) depending on the solvent. It should be emphasized here that the charge-separated lifetime of the present triad has been prolonged by replacing porphyrin monomer with porphyrin dimer without reducing the quantum yield significantly. The charge-separated lifetime is governed by stepwise charge recombination rather than direct charge recombination.
|
