Short-Wavelength Absorbing Complexes of Chlorophyll a in Micellar Solution of Cationic Detergents
2014
Schmidt, A. | Gottstein, J. | Scheer, H. | Scherz, A.
Micellar aggregates have been prepared from chlorophyll a. Whereas most detergents including non-ionic, zwitterionic and anionic ones, produce aggregates with long-wavelength shifted and enhanced QY absorption, the cationic detergents hexadecyl-trimethylammonium-bromide and hexadecyl-pyridiniumchloride produce complexes with opposite traits: The QY absorption is shifted to shorter wavelengths, and it is hypochromic. The optical activity is increased as in the long-wave length shifted complexes, but the cd bands are non-conservative and coincide with the absorption maxima. The complexes are most likely small aggregates of chlorophyll with a changed geometry as compared to the “standard” ones.
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