Spectroscopic studies of the interaction of cobalt(II) N,N',N″,N‴-tetramethyltetra-3,4-pyridinoporphyrazine with amino acids and nitrogen oxides

Abstract

ABSTRACT:The interaction of histidine, cysteine, NO and nitrite with cobalt(II) N, N',N@,N@'-tetramethyltetra-3,4-tetrapyridinoporphyrazine

Thermodynamic and spectroscopic study on the binding of cationic Zn(ii) and Co(ii) tetrapyridinoporphyrazines to calf thymus DNA: the role of the central metal in binding parameters

“…Thus water-soluble compounds can be obtained, 22 which some of them existing largely as monomers in aqueous solutions. 23,24 Even though there has been considerable research into the application of porphyrins and phthalocyanines for their binding to nucleic acids, [25][26][27] the tetramethylmethalloporphyrazines have received little attention. The present work was undertaken to determine the equilibrium binding processes of N,N 0 ,N 00 ,N 000tetramethyltetra-3,4-pyridinoporphyrazinatozinc(II) {[Zn(3,4tmtppa))] 41 } and N,N 0 ,N 00 ,N 000 -tetramethyltetra-3,4-pyridinoporphyrazinatocobalt(II) {[Co(3,4-tmtppa)] 41 }shown in Scheme 1 to calf thymus DNA (ctDNA).…”

Study on Interaction of Cationic Porphyrazine with Synthetic Polynucleotides

“…The pyridine nature of these compounds allows easy quaternization in order to modulate the solubility of the tetracationic derivatives. Thus watersoluble compounds can be obtained [13] with some of them existing largely as monomers in aqueous solutions [14][15][16].…”