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Detection of Fluorescence from Single Chlorophyll a Molecules Absorbed on Glass Surface |
| JI Dong-Mei1,2;HUANG Zheng-Xi1,2;XIA An-Dong1 |
| 1The State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080
2Graduate School of Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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JI Dong-Mei, HUANG Zheng-Xi, XIA An-Dong 2005 Chin. Phys. Lett. 22 317-320 |
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Abstract We investigate the single molecule spectroscopy of chlorophyll a molecules on glass surface in N2-saturated environment. The basic photodynamic parameters of chlorophyll a molecules, such as fluorescence lifetime, survival time before photobleaching, on-time, and off-time, are reported. A four-level model is employed to describe the possible dynamics and photobleaching of chlorophyll a upon excitation. Broad distributions in fluorescence lifetimes and survival times are mainly due to the heterogeneities of both molecular conformation and local environment.
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| Keywords:
33.50.-j
33.80.-b
78.55.-m
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Published: 01 February 2005
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| PACS: |
33.50.-j
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(Fluorescence and phosphorescence; radiationless transitions, quenching (intersystem crossing, internal conversion))
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33.80.-b
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(Photon interactions with molecules)
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78.55.-m
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(Photoluminescence, properties and materials)
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