We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Oxidative degradation of porphyrins and metalloporphyrins under polythermal conditions.
- Authors
Antina, E.; Balantseva, E.; Berezin, M.
- Abstract
Influence of structure on the thermal properties of a large group of natural and synthetic porphyrins (HP) and metalloporphyrins (MP) was analyzed on the ground of thermogravimetric studies. The initial stage of thermal degradation of 'classical' porphyrin containing a flat or pseudo-planar macrocycle is a result of oxidative degradation of the macrocyclic structure with the formation of linear tetrapyrrols. The negative effect on the thermal stability of porphyrins exerts the violation of the planar structure of the macrocycle, and the presence of bulky alkyl and polar pseudoalkyl substituents. In many cases, the general trend in the decrease in the stability of metalloporphyrins (MP) in comparison with the corresponding HP is a consequence of intramolecular metal ↔ ligand redox processes.
- Subjects
PORPHYRINS; THERMAL properties; THERMOGRAVIMETRY; TETRAPYRROLES; MACROCYCLIC compounds; OXIDATION-reduction reaction
- Publication
Russian Journal of General Chemistry, 2011, Vol 81, Issue 6, p1222
- ISSN
1070-3632
- Publication type
Article
- DOI
10.1134/S1070363211060260