Synthesis, spectra, and complexing properties of polyoxyethylene-substituted 5,15-diphenylporphyrins
摘要:
Porphyrins with two opposite meso-phenyl substituents of the macroring linked via o-positions by polyoxyethylene bridges of various lengths were prepared. Their spectra and complexing properties toward Zn2+ and 1,4-diazabicyclo[2.2.2]octane were examined. The rate constants of formation and stability constants of the corresponding complexes were determined, and the concentration ranges of their formation were evaluated.
Complexation of zinc octaalkylporphyrin with mono-, di-, and triethylenediamines in toluene
作者:G. M. Mamardashvili、N. Zh. Mamardashvili、O. I. Koifman
DOI:10.1134/s0036023607080104
日期:2007.8
The complexation of zinc octaalkylporphyrin with mono-, di-, and triethylenediamines in toluene was studied by spectrophotometry using the molar ratio method and by H-1 NMR. The effect of the structure of the two-center organic base on the formation of 1 : 1 or 2 : 1 metal porphyrin-ligand complex was established. The stability constants of the resulting complexes were calculated and the concentration ranges of their existence were determined.