Photoactive meso-tetra(4-pyridyl)porphyrin-tetrakis-[chloro(2,2'bipyridine)platinum(ii) derivatives recognize and cleave DNA upon irradiation.

In this work, we evaluate the interaction of the peripheral Pt(bpy)Cl substituted porphyrins, H2PtPor and ZnPtPor with DNA using UV-vis, emission fluorescence, CD spectroscopy, and DNA melting properties altered by the Pt(ii)-porphyrinoid compounds. Additionally, we observe the ability of these porphyrin derivatives to generate O and to efficiently photocleave plasmid DNA upon visible light irradiation based on a mixed (oxidative/hydrolytic) mechanism.

meso-Mono-[4-(1,4,7-triazacyclononanyl)]-tri(phenyl)]porphyrin and the respective zinc(ii)-complex: complete characterization and biomolecules binding abilities.

We aimed to synthesize a new series of triazacyclononanyl-porphyrins (4 and 5) with the potential ability to bind DNA. For this, the free-base porphyrin 4 and the corresponding Zn(ii)-complex 5 were synthesized by the Schiff base formation reaction. The binding ability of the porphyrin derivatives 4 and 5 with DNA from calf-thymus was studied by UV-vis and emission spectroscopy.