Synthesis and Characterization of the Ligand Based on Benzimidazole and Its Copper Complex: DNA Binding and Antioxidant Activity

Figure 5

Emission spectra of EB bound to CT-DNA in the presence of the free buobb (a) and the Cu(II) complex (c), 𝜆_ex=520 nm. The arrows show the intensity changes upon increasing concentrations of the complexes. Fluorescence quenching curves of EB bound to CT-DNA by the free buobb (b) and the Cu(II) complex (d). (Plots of 𝐼₀/𝐼 versus [Complex]).

(a)

(b)

(c)

(d)