Photoactivity of new octacationic magnesium(II) and zinc(II) porphyrazines in a water solution and G-quadruplex binding ability of differently sized zinc(II) porphyrazines
The new octacations [(2-Mepy)8PzM]8+ [M = MgII(H2O), ZnII], isolated as iodide salts, were obtained from the corresponding neutral complexes [Py8PzM] (Py = 2-pyridyl; Pz = porphyrazinato dianion) upon quaternization with CH3I of the N atoms of the 2-pyridyl rings under mild experimental conditions. The absorption spectra registered in organic solvents as well as in water (H2O) confirm the presence of the complexes in their monomeric form in all cases.