Two new neutral copper(II) complexes with dipicolinic acid and 3-amino-1H-1,2,4-triazole formed under different
Masoumeh Tabatabaee1, Maryam Bordbar, Mitra Ghassemzadeh
1Department of Chemistry, Yaz Branch, Islamic Azad University, Yazd, Iran.
Abstract:
Two Cu(II) complexes, [Cu₂(μ-atr)(pydc)₂(H₂O)₄]·5H₂O (1) and [Cu(atr)(pydc) (H₂O)]·H₂O (2), with pyridine-2,6-dicarboxylic acid (H₂pydc) and 3-amino-1H-1,2,4-triazole (atr), have been synthesized and characterized. The interaction ability of the both complexes with native calf thymus DNA (CT-DNA) has been monitored as a function of the metal complex-DNA molar ratio. UV-vis spectrophotometry, circular dichroism (CD), thermal denaturation studies, cyclic voltammetry (CV) and viscosity measurements. The intrinsic binding constants K(b) of complexes 1 and 2, with CT-DNA obtained from UV-vis absorption studies were 4.7 (±0. 1) × 10(4) and 9.5 (±0. 1) × 10(4) M(-1), respectively. Further investigation of interaction mode was performed using viscosity, cyclic voltammetry and T(m) of CT-DNA studies as well as CD study, indicating complexes bind to DNA via an intercalation mode.
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