DMAP and HMTA manganese(III) meso-tetraphenylporphyrin-based coordination complexes: Syntheses, physicochemical properties, structural and biological activities

The reactions of the (triflato)(meso-tetra(para-methoxyphenyl)porphyrinato)manganese(III) [MnIII(TMPP)(SO3CF3)] complex with an excess of 4-dimethylaminopyridine (DMAP) and hexamethylenetetramine (HMTA) were examined These reactions yield crystalline [MnIII(TMPP)(DMAP)2](0.1Cl)(0.9SO3CF3)•2CHCl3 (1) and [MnIII(TMPP)(HMTA)2](SO3CF3)•2CH2Cl2 (2) complexes, resp. The hyper d-type electronic spectra of 1-2 are characteristic for high-spin (S = 2) Mn(III) metalloporphyrins with very red shifted Soret bands. A cyclic voltammetry study was carried out on these two Mn(III) coordination compounds The crystal structures of the solid complexes 1-2 were determined by x-ray single-crystal diffraction and elucidated by Hirshfeld surface approach. Furthermore, bioactivity of the H2TMPP free base, the [MnIII(TMPP)(SO3CF3)] starting material and complexes 1-2, was assessed by a set of in vitro tests checking for antioxidant, antibacterial and antifungal (against several strains) effects.


Soumis le 5 septembre 2023