Time-resolved excitation density dependent fluorescence of R-phycoerythrin single crystal

The fluorescence kinetics of a new single crystal, R-phycoerythrin (R-PE), has been studied by picosecond laser spectroscopy. An excitonic band, which is much more narrow than that of the molecular fluorescnece, is observed. At high pump density, superradiance of excitons in the bulk pure single cry...

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Published inChemical physics letters Vol. 222; no. 3; pp. 204 - 208
Main Authors Wang, H.Z., Zheng, X.G., Zhao, F.L., Gao, Z.L., Yu, Z.X., Zhu, J.C., Jiang, L.J., Zhang, J.P., Liang, D.C.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 13.05.1994
Elsevier Science
Subjects
Analytical, structural and metabolic biochemistry
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Heterocyclic compounds, pigments
Other biological molecules
Tetrapyrrolic pigments
Exciton
Photoluminescence
Phycoerythrin
Superradiance
Fluorescence
Experimental study
Energy transfer
Single crystal
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Summary:The fluorescence kinetics of a new single crystal, R-phycoerythrin (R-PE), has been studied by picosecond laser spectroscopy. An excitonic band, which is much more narrow than that of the molecular fluorescnece, is observed. At high pump density, superradiance of excitons in the bulk pure single crystal is recorded. The experimental results of fluorescence kinetics and exciton superradiance of R-PE crystal demonstrate that exciton energy transfer is natural, effective and rapid. It is concluded that excitons play an important role in energy transfer in the antennae of photosynthetic systems.
ISSN:0009-2614
1873-4448
DOI:10.1016/0009-2614(94)00338-6