Synthesis, Spectroscopic Characterisation, and Biopotential and DNA Cleavage Applications of Mixed Ligand 4-N,N-Dimethylaminopyridine Metal Complexes

Table 10

Electrochemical behaviour of metal complexes in the absence and presence of CT-DNA.

Complex	Redox couple	𝐸pc (V)		𝐸pa (V)		Δ𝐸𝑝 (V)		𝐸1/2 (V)		𝐾𝑅/𝐾𝑂
		Free	Bound	Free	Bound	Free	Bound	Free	Bound
[NiCl2(DP)4]	Ni(II)/Ni(I)	−0.267	−0.182	−0.858	−0.571	−0.491	−0.389	0.309	0.311	0.55
[CuCl2(DP)4]	Cu(III)/Cu(II)	0.643	0.478	0.868	0.215	0.455	0.263	0.240	0.216	0.25
	Cu(II)/Cu(I)	−0.865	−0.728	−0.620	−0.450	0.415	0.323	−0.543	−0.516	4.22

𝐸_1/2=1/2(𝐸_pa+𝐸_pc), Δ𝐸_𝑝=𝐸_pa−𝐸_pc, where 𝐸_pa and 𝐸_pc are anodic and cathodic peak potentials, respectively. Scan rate: 50 m Vs⁻¹. 𝐼_pc and 𝐼_pa are cathodic and anodic peak currents, respectively.