Журнал "Макрогетероциклы"

S. A. Syrbu,^a@ S. G. Pukhovskaya,^b Dao The Nam,^c Yu. B. Ivanova,^a and M. I. Razumov^d

^aG.A. Krestov Institute of Solutions Chemistry of Russian Academy of Science Russia, 153045 Ivanovo,Russia

^bIvanovo State University of Chemistry and Technology, 153000 Ivanovo, Russia

^cInstitute of Material Chemistry, Vietnam Academy of Military Science and Technology, Hanoi, Vietnam

^dN.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 117907 Moscow, Russia

^@Corresponding author E-mail: sasyrbu@gmail.com

DOI: 10.6060/mhc190557s

Macroheterocycles 2019 12(2) 135-142

The acid-base and coordination properties for the series of meso-alkyl substituted porphyrins were studied spectrophotometrically: 5,10,15,20-tetrabutylporphyrin (H₂(n-Bu)₄P), 5,10,15,20-tetra-iso-butylporphyrin (H₂(i-Bu)₄P), 5,10,15,20-tetrakis(tert-butyl)porphyrin (H₂(t-BuP)₄), 5,10,15,20-tetra(trifluoromethyl)porphine (H₂(CF₃)₄P). The electronic absorption spectra of molecular and ionized forms of meso-substituted porphyrins in acetonitrile, acid constants and basic ionization of the porphyrins were measured. It is shown that a change in the structure of the meso-substituent in the porphyrin macrocycle drastically changes the acid-base and coordination properties of the porphyrin. The analysis of complex formation of the molecular and dianionic forms of the porphyrin with zinc acetate has been made.