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Metalloporphyrins in Polymeric Matrices, Micelles, and Vesicles, V. 5‐(1′‐Methyl‐4,4′‐bipyridinium‐1‐yl)Octaethylporphyrin Dichloride, a meso ‐Viologenporphyrinate
Author(s) -
Fuhrhop JürgenHinrich,
Wanja Uwe,
Bünzel Marlies
Publication year - 1984
Publication title -
liebigs annalen der chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 0170-2041
DOI - 10.1002/jlac.198419840303
Subject(s) - chemistry , porphyrin , photochemistry , zinc , dication , viologen , bathochromic shift , deprotonation , vesicle , medicinal chemistry , inorganic chemistry , dithionite , absorption spectroscopy , polymer chemistry , organic chemistry , molecule , fluorescence , physics , quantum mechanics , ion , biochemistry , membrane , enzyme
The water‐soluble zinc complex of the title compound was obtained by thallium(III) nitrate oxidation of zinc octaethylporphyrinate in the presence of 4,4′‐bipyridine and subsequent treatment with methyl iodide and acid. An absorption band at 330 nm was observed in the electronrich zinc complex and deprotonated dianion which was absent in the spectrum of the free base porphyrin. Another new absorption band at 750 nm was found in the diprotonated porphyrin dication if its bipyridinium substituent was reduced by zinc to the viologen radical. — A solution of methylviologen zinc porphyrinate in negatively charged ditetradecylsulfosuccinate vesicles was not reduced by dithionite. In electroneutral lecithin vesicles reduction to the viologen radical was observed.