Synthesis and axial-ligand binding of zinc complexes of amphiphilic porphyrins containing a hydrophobic binding pocket

Amphiphilic zinc porphyrins containing two sulfonate groups and a hydrophobic binding pocket were synthesized efficiently and characterized. Binding of pyridine, butylamine, and pyrrolidine to the zinc complexes was examined spectrophotometrically in water and in chloroform. The binding behavior was discussed on the basis of the binding constants.