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Optical spectroscopy of a highly fluorescent aggregate of bacteriochlorophyll cBacteriochlorophyll (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.
Document ID
20040090204
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Causgrove, T. P.
(Arizona State University Tempe 85287-1604)
Cheng, P.
Brune, D. C.
Blankenship, R. E.
Date Acquired
August 21, 2013
Publication Date
May 27, 1993
Publication Information
Publication: The Journal of physical chemistry
Volume: 97
Issue: 21
ISSN: 0022-3654
Subject Category
Exobiology
Funding Number(s)
CONTRACT_GRANT: DE-FG-88ER13969
CONTRACT_GRANT: DE-FG-85ER13388
CONTRACT_GRANT: DE-FG05-87ER75361
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Exobiology
Non-NASA Center
NASA Discipline Number 52-30
NASA Program Exobiology

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