Chlorophyll a Franck-Condon factors and excitation energy transfer

Journal Article · Thu Apr 01 04:00:00 EST 1999 · Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical

DOI:https://doi.org/10.1021/jp984460e· OSTI ID:345111

Pieper, J ^[1]; Voigt, J ^[1]; Small, G J ^[2]

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1. Humboldt Univ., Berlin (Germany). Inst. of Physics
2. Ames Lab., IA (United States)

The Franck-Condon factors for the S{sub 1}(Q{sub y}) {leftrightarrow} S{sub 0} electronic transition of chlorophyll (Chl) molecules are important for understanding excitation energy transfer in photosynthetic complexes. Currently, there are two sets of Chl a Frank-Condon factors for over 40 modes, one determined by spectral hole burning and the other by fluorescence line narrowing. Those obtained by the latter spectroscopy are, on average, a factor of 30 times smaller than the hole burning values. Nonline-narrowed fluorescence results for the light-harvesting complex 2 of photosystem 2 at 4.2 K are presented that agree quite well with the hole burning but not the fluorescence line narrowing values.

• Sponsoring Organization: USDOE, Washington, DC (United States); Deutscher Akademischer Austauschdienst, Bonn (Germany); Deutsche Forschungsgemeinschaft, Bonn (Germany)
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 345111
• Journal Information: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical, Journal Name: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical Journal Issue: 13 Vol. 103; ISSN 1089-5647; ISSN JPCBFK
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
CHLOROPHYLL
ENERGY TRANSFER
EXCITATION
FLUORESCENCE SPECTROSCOPY
FRANCK-CONDON PRINCIPLE
PHOTOSYNTHESIS