Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
Volume 54, Issue 2-3, Pages 194-200Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S1011-1344(00)00016-6
Keywords
pheophorbide a; dimerization; absorption; fluorescence; aggregation; dipole moment; exciton theory
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This work reports on a monomer-dimer equilibrium state of pheophorbide a in solution. A methodology for controlling the equilibrium constant by use of temperature and solvent variation is described. The absorption spectrum of the dimer is calculated, using different prepared equilibria of monomer and dimer in solution. We propose that these aggregates provide a good model for understanding the dimerization process in tetrapyrroles. (C) 2000 Elsevier Science S.A. All rights reserved.
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