Ying Shi, Y. J. Shiu, Charlene Su, S. H. Lin, Ke-li Han. Transient Absorption of the Chlorophyll a in Ethanol[J]. Chinese Journal of Chemical Physics , 2006, 19(1): 6-10. doi: 10.1360/cjcp2006.19(1).6.5
Citation: Ying Shi, Y. J. Shiu, Charlene Su, S. H. Lin, Ke-li Han. Transient Absorption of the Chlorophyll a in Ethanol[J]. Chinese Journal of Chemical Physics , 2006, 19(1): 6-10. doi: 10.1360/cjcp2006.19(1).6.5

Transient Absorption of the Chlorophyll a in Ethanol

doi: 10.1360/cjcp2006.19(1).6.5
Funds:  National Natural Science Foundation of China (NSFC No. 29825107, No.29853001), the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant: DICP K200/E3) and NKBRSF. Support is also provided from the National Science Council of Taiwan and Academia Sinica.
  • Received Date: 2004-12-18
  • The excited state of Chlorophyll a is investigated by femtosecond transient absorption. The transient absorption spectra of Q band and By band of Chlorophyll a in ethanol have been observed. The fast kinetics of Chlorophyll a which exhibit two ultrafast components were also measured. The one is assigned to transient absorption of the inhomogeneously broadened ground state absorption spectrum, while the other is the response of the solvent to the change of the electron configuration in the excited state due to salvation dynamics of the polar solvent molecules. To understand the anisotropy of Chlorophyll a in ethanol, the anisotropy profile was also performed by 405 nm excitation and found that the anisotropy profile is 0.143. The possible combination of θda, θdb and η at excitation of By band has been simulated.
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Transient Absorption of the Chlorophyll a in Ethanol

doi: 10.1360/cjcp2006.19(1).6.5
Funds:  National Natural Science Foundation of China (NSFC No. 29825107, No.29853001), the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant: DICP K200/E3) and NKBRSF. Support is also provided from the National Science Council of Taiwan and Academia Sinica.

Abstract: The excited state of Chlorophyll a is investigated by femtosecond transient absorption. The transient absorption spectra of Q band and By band of Chlorophyll a in ethanol have been observed. The fast kinetics of Chlorophyll a which exhibit two ultrafast components were also measured. The one is assigned to transient absorption of the inhomogeneously broadened ground state absorption spectrum, while the other is the response of the solvent to the change of the electron configuration in the excited state due to salvation dynamics of the polar solvent molecules. To understand the anisotropy of Chlorophyll a in ethanol, the anisotropy profile was also performed by 405 nm excitation and found that the anisotropy profile is 0.143. The possible combination of θda, θdb and η at excitation of By band has been simulated.

Ying Shi, Y. J. Shiu, Charlene Su, S. H. Lin, Ke-li Han. Transient Absorption of the Chlorophyll a in Ethanol[J]. Chinese Journal of Chemical Physics , 2006, 19(1): 6-10. doi: 10.1360/cjcp2006.19(1).6.5
Citation: Ying Shi, Y. J. Shiu, Charlene Su, S. H. Lin, Ke-li Han. Transient Absorption of the Chlorophyll a in Ethanol[J]. Chinese Journal of Chemical Physics , 2006, 19(1): 6-10. doi: 10.1360/cjcp2006.19(1).6.5

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