Optical spectroscopy of a highly fluorescent aggregate of bacteriochlorophyll c.
Bacteriochlorophyll (BChl) c and a similar model compound, Mg-methyl bacteriopheophorbide d, form several types of aggregates in nonpolar solvents.  One of these aggregates is highly fluorescent, with a quantum yield higher than that of the monomer.  This aggregate is also unusual in that it shows a rise time in its fluorescence emission decay at certain wavelengths, which is ascribed to a change in conformation of the aggregate.  An analysis of fluorescence depolarization data is consistent with either a linear aggregate of four or five monomers or preferably a cyclic arrangement of three dimers.
Causgrove
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TP
Department of Chemistry and Biochemistry, Arizona State University, Tempe 85287-1604.
Cheng
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Brune
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DC
Blankenship
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D001419:Bacteria / Q000737:chemistry*; D001426:Bacterial Proteins / Q000737:chemistry*; D001429:Bacteriochlorophylls / Q000737:chemistry*; D005453:Fluorescence; D008956:Models, Chemical; D055095:Optics and Photonics; D010777:Photochemistry; D010860:Pigments, Biological; D013057:Spectrum Analysis / Q000379:methods
D001426:Bacterial Proteins; D001429:Bacteriochlorophylls; D010860:Pigments, Biological; C002084:bacteriochlorophyll c