Bacteriochlorophyll aggregates in positively charged micelles.
Micellar complexes were prepared from bacteriochlorophyll a and bacteriopheophytin a with the cationic detergents, cetyltrimethyl ammonium bromide and cetylpyridinium chloride. These complexes have spectroscopic properties (absorption, circular dichroism) which are very different from the ones formed with non-ionic detergents like Triton X-100, and also with anionic detergents. Bacteriochlorophyll a forms two complexes: One is blue-shifted and has excitonically coupled Qy transitions. The second one is extremely red-shifted. The unusual properties are suggested to result from interactions of the positively charged head-group of the detergent with the tetrapyrrole.
Gottstein
J
J
Botanisches Institut, Universität München, Germany.
Scherz
A
A
Scheer
H
H
D001429:Bacteriochlorophylls / Q000737:chemistry*; D003902:Detergents; D008823:Micelles
D001429:Bacteriochlorophylls; D003902:Detergents; D008823:Micelles