| 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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| 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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