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Citation: Li Xi-You, Tian Hong-Jian, Xu Hui-Jun. The Solvents Effects on Intramolecular Energy and Electron Transfer of Porphyrin-phthalo cyanime Heterodimers[J]. Acta Physico-Chimica Sinica, ;1997, 13(11): 984-991. doi: 10.3866/PKU.WHXB19971106 shu

The Solvents Effects on Intramolecular Energy and Electron Transfer of Porphyrin-phthalo cyanime Heterodimers

1.
Institute of Photographic Chemistry,Chinese Academy of Sciences,Beijing 100101

Received Date: 16 January 1997
Available Online: 15 November 1997

Intramolecular energy transfer and electron transfer of porphyrin-phthalocyanine heterodimers, linked by oxygen atom or piperazine in different solvents were investigated by fluorescence spectroscopy. The energy transfer and electron transfer efficiency were calculated. It has been found that energy transfer occurred in competition with electron transfer process depending on the polarity of the solvents. In polar solvents, electron transfer prevails while the energy transfer is favored in nonpolar solvents. The driving force(△GET0)of the electron transfer reaction in different solvents was estimated using Rehm-Weller equation. The results indicated that the conformations of the heterodimers as well as the ability of the solvent to stablize the charge-seperated state affect the photophysical process greatly. od correlations of φEnT and φET with solvent polarity f have been obtained.
- Solvent effect,
- Dyad,
- Energy transfer,
- Electron transfer
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