Excitation Energy Transfer in PS I of the Cyanobacterium Gloeobacter violaceus PCC 7421 That Lacks the Long-Wavelength Form of Chlorophyll a

2008 ◽  
pp. 299-302
Author(s):  
Mamoru Mimuro ◽  
Michiya Higuchi ◽  
Hidetoshi Inoue ◽  
Makio Yokono ◽  
Tohru Tsuchiya ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Chlorophyll A ◽  
Excitation Energy Transfer ◽  
Long Wavelength ◽  
Ps I ◽  
Gloeobacter Violaceus

Excitation Energy Transfer among Chlorophyll a Molecules in Polystyrene: Concentration Dependence of Quantum Yield, Polarization and Lifetime of Fluorescence

1978 ◽  
Vol 33 (11-12) ◽  
pp. 863-869 ◽  
Author(s):  
D. Wong ◽  
Govindjee ◽  
H. Merkelo ◽  
K. Vacek
Keyword(s):  
Energy Transfer ◽  
Quantum Yield ◽  
Excitation Energy ◽  
Chlorophyll A ◽  
Excitation Energy Transfer ◽  
Concentration Quenching ◽  
Electronic Excitation Energy Transfer ◽  
Electronic Excitation Energy ◽  
Polarization Of Fluorescence ◽  
Total Concentrations

Electronic excitation energy transfer was studied for chlorophyll a in a solid solution of poly­styrene by measuring the concentration quenching of quantum yield, polarization, and lifetime of fluorescence. The concentration quenching of the experimental fluorescence quantum yield is adequately described by Kelly and Porter’s empirical formula (Proc. Roy. Soc., Lond. A 315, 149, 1970), and of polarization of fluorescence by the Jablonski theory (Acta Phys. Pol., 14, 295, 1955). With increasing concentration of chlorophyll a, the fluorescence peak at 672 nm (mainly monomer) is red-shifted, the intensity of the emission peak at ∼730 nm (mainly aggregate) relative to that at the shorter wavelength is increased. The R̅0 values, calculated by using total concentrations, for the emission at 672 nm and 730 nm are 73 ± 2 Å and 45 ±1 Å, respectively. This may suggest that the chlorophyll monomers have a greater efficiency of energy transfer than the aggregates, which fluoresce at ∼ 730 nm.

scholarly journals Förster Excitation Energy Transfer in Peridinin-Chlorophyll-a-Protein

2000 ◽  
Vol 78 (1) ◽  
pp. 344-353 ◽  
Author(s):  
Foske J. Kleima ◽  
Eckhard Hofmann ◽  
Bas Gobets ◽  
Ivo H.M. van Stokkum ◽  
Rienk van Grondelle ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Chlorophyll A ◽  
Excitation Energy Transfer
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