Significance of the excitonic intensity borrowing in the J-/H-aggregates of bacteriochlorophylls/chlorophylls

Date

2006-02-01

Author

Gulen, D

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A quantitative analysis of the excitonic intensity borrowing for the J-/H-aggregates of the bacteriochlorophylls/chlorophylls (BChls/Chls) in specific, and of porphyrins in general, is presented. The analysis is based on the argument that the mixing between the two energetically well-separated bands, such as the Q and B bands of BChls/Chls, should be considered important if the aggregated system possesses an excitonic superstate. A remarkably simple explanation of the significance of the excitonic intensity borrowing is given: superhyperchromism is manifested by the mediation of interband coupling between the superstates in the two well- separated bands of such aggregates. A comprehensive discussion on the significance of superhyperchromism and on its size-dependence is provided in connection with its effects on the absorption spectra of the BChl/Chl J- and H-aggregates.

Subject Keywords

Chlorophylls, Chlorosomes, Excitonic Intensity Borrowing, Hyperchromism, J-/H-Aggregates, Optical Properties, Photosynthesis, Porphyrin Nanowires, Supramolecular Antenna Complexes

URI

https://hdl.handle.net/11511/63557

Journal

PHOTOSYNTHESIS RESEARCH

DOI

https://doi.org/10.1007/s11120-005-8408-2

Collections

Department of Physics, Article

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Citation Formats

D. Gulen, “Significance of the excitonic intensity borrowing in the J-/H-aggregates of bacteriochlorophylls/chlorophylls,” PHOTOSYNTHESIS RESEARCH, pp. 205–214, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/63557.