Octacationic and supramolecular porphyrazines

In this study, octacationic and nonanuclear supramolecular porphyrazines were synthesized and characterized by the common spectral methods. For the synthesis of target octacationic and supramolecular structures, first the octakis(2-hydroxyethylthio) porhyrazinatomagnesium (MgOHPz) which was required for the designing of the core of the supramolecule, was synthesized as given in the literature. The second step of the supramolecular structure was the addition of pyridyl donors on the periferal positions of the porphrazineunit. For this purpose, MgOHPz was reacted with pyridine-4-carboxylic acid to give the ester units on the periferies of porphyrazine. Octakis(4-pyridoxyethylthio) porphyrazinato magnesium(MgPyPz) was prepared by the complete esterification of all the OH-groups in MgOHPz with pyridine-4-carboxylic acid (isonicotinic acid) in pyridine by the presence of dicyclohexylcarbodiimide and 4-toluenesulphonic acid as catalysts in seven days at ambient temperature. The blue-green color octakis(4-pyridoxyethylthio) porphyrazinatomagnesium, MgPyPz, was isolated with good yield. The octacationic molecule was obtained after the quaternization of the MgPyPz with iodomethane in the dark. The ready solubility of the product in water confirms the proposed structure. The nonanuclear supramolecule was prepared by the coordination reaction of the vanadylacetylacetonate, VO(acac)2 with MgPyPz and characterized by EPR technique together with the spectral data