Synthesis, Electrochemical, Spectroscopic, Antimicrobial, and Superoxide Dismutase Activity of Nickel (II) Complexes with Bidentate Schiff Bases

Table 1

Cyclic voltammetry data for 1 mM solution of the nickel (II) complexes in DMSO containing 0.1 M NaClO₄ as supporting electrolyte.

Scan rate (m v/s)	𝐸pc (mv)	𝐼pc (μA)	𝐸pa (mv)	𝐼pa (𝜇A)	Δ𝐸𝑝	𝐸^′0	𝐼pa/𝐼pc (μA)
[Ni(L^1)2](ClO4)2(1) 1009	−637	1.148	−552	0.682	115	609	0.594
200	−683	0.895	−560	0.485	123	621	0.541
[Ni(L^2)2](ClO4)2(2) 100	−790	1.120	−672	0.755	118	731	0.674
200	−793	1.722	−668	1.549	125	730	0.899
[Ni(L^3)2](ClO4)2(3) 100	−685	1.148	−552	0.916	133	618	0.797
200	−688	1.118	−570	1.044	118	629	0.933
[Ni(L^4)2](ClO4)2(4) 100	−685	1.140	−548	0.680	137	616	0.596
200	−690	0.790	−564	0.482	126	628	0.610
[Ni(L^5)2](ClO4)2(5) 100	−782	1.125	−670	0.756	112	726	0.672
200	−787	1.925	−664	1.550	122	726	0.805

Δ𝐸_𝑝=𝐸_pa−𝐸_pc; 𝐸^′₀=(𝐸_pa+𝐸_pc)/2.