The Extraction Ability and Sensitivity of Porphyrazine Derivatives Towards Some Transition Metal Cations

The synthesis of novel metal-free and magnesium porphyrazines, peripherally substituted with dithia-dioxa (S₂O₂) and tetrathia (S₄) 14-membered macrocycles were performed by cyclotetramerization of (6Z)-1,3,4,9,10,12-hexahydro-2,5,8,11-benzo-dioxadithiacyclotetradecine-6,7-dicarbodinitrile (3) or (6Z)-1,3,4,9,10,12-hexahydro 2,5,8,11-benzotetrathiacyclotetradecine-6,7-dicarbodinitrile (5). The metal-free porphyrazines have been obtained by known route. The structure of compounds were characterized by elemental analysis and ¹H, ¹³C NMR, IR, UV-vis, and MS spectral data. The solvent extraction properties of the synthesized compounds towards some metal cations, such as Ag(I), Hg(II), Cu(II), Mn(II), Cr(III), Ni(II), Pb(II), and Zn(II) have been investigated. The effect of Cu²⁺, Mn²⁺, Ni²⁺, Pb²⁺, Sr²⁺, Al³⁺, Zn²⁺, Ba²⁺, Cd²⁺, Co²⁺, Hg²⁺, and Ag⁺ ions on the absorption spectra of the compounds were investigated by means of spectrophotometric method. Magnesium porphyrazine with S₂O₂ (6) interacted within Hg²⁺ ion specifically of all the tested metal ions.