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- Title
Determination of acidity of di-, tri-, and tetraazaporphyrins in dimethyl sulfoxide-potassium cryptate medium.
- Authors
Kulikova, O. M.; Ivanova, Yu. B.; Mamardashvili, N. Zh.
- Abstract
idic properties of 10,20-diaza-3,7,13,17-tetramethyl-2,8,12,18-tetra- n-hexylporphyrin, 2,7,12,17-tetra- t-butyltetrabenzo-5,10,15-triazaporphyrin and octa( n-amyloxy)phthalocyanine in the system of dimethyl sulfoxide-potassium cryptates (DMSO-K[222]OH) at ambient temperature was investigated by the method of spectrophotometric titration. The porphyrins in the DMSO-K[222]OH medium were shown to dissociate sequentially forming mono- and dianions in two steps. The concentration ranges of existence of the anionic forms and the acidity sequence of the studied meso-aza-substituted porphyrins were investigated.
- Subjects
DIMETHYL sulfoxide; CELL metabolism; VOLUMETRIC analysis; PORPHYRINS; ELECTRONEGATIVITY
- Publication
Russian Journal of General Chemistry, 2011, Vol 81, Issue 3, p602
- ISSN
1070-3632
- Publication type
Article
- DOI
10.1134/S1070363211030285