THE ''Q-BAND'' ABSORPTION spECTRA OF HEMATOPORPHYRIN MONOMER AND AGGREGATE IN AQUEOUS SOLUTION |
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| Authors: | GERALD J. SMITH KENNETH P. GHIGGINO LOUISE E. BENNETT TRACY L. NERO |
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| Affiliation: | Department of Physical Chemistry, The University of Melbourne, Parkville, Victoria 3052, Australia |
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| Abstract: | Abstract The resolution of the absorption spectra in the Q band (480 nm-620 nm) spectral region of monomeric and dimeric hematoporphyrin species present in aqueous solutions has been achieved using absorption, fluorescence and computer analysis methods. The absorption maxima of the dimer in this spectral region are red shifted about 12 nm with respect to those of the monomer. The significance of this finding in relationship to the well documented blue shift of hematoporphyrin aggregate observed in the Soret band region (λmalx∼400 nm) of the absorption spectrum is discussed. |
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