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Citation: He Yong, Xiong Yi-Jia, Zhu Qi-He, Kong Fan-Ao. Ultrafast Internal Conversion and Vibrational Relaxation of Butylphthalocyanine and Tetraphenylporphyrin in Solution[J]. Acta Physico-Chimica Sinica, ;1999, 15(07): 636-642. doi: 10.3866/PKU.WHXB19990711 shu

Ultrafast Internal Conversion and Vibrational Relaxation of Butylphthalocyanine and Tetraphenylporphyrin in Solution

1.
State Key Laboratory of Molecular Reaction Dynamics,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080

Received Date: 17 November 1998
Available Online: 15 July 1999

Ultrafast internal conversion (IC) and vibrational relaxation dynamics of electronically excited butylphthalocyanine (BuPc ) and tetra-phenylporpyrin (TPP ) molecules in solution are theoretically studied on the basis of the perturbative density operaor method and the transient linear susceptibility theory. Femtosecond time-resolved profile of fluorescence depetion is simulated with a single vibrational mode. The internal conversion, the vibrational relaxation and the solvation rate constants in electronically excited states are determined. The results show that the sharp peak of fluorescence depletion reflects primarily the internal conversion process from the S2 state to the S1 state of BuPc and TPP.IC occurs in a 200 fs time scale.
- Femtosecond fluorescence depldtion spectra,
- Ultrafast internal conversion,
- Vibrational relxation
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