Cu(II) Complexes of Isoniazid Schiff Bases: DNA/BSA Binding and Cytotoxicity Studies on A549 Cell Line

Table 3

Stern-Volmer quenching constant (𝐾_SV), quenching rate constant 𝑘_𝑞, association binding constant (𝐾_𝑎), and number of binding sites 𝑛 calculated from double logarithmic plots for the interaction of ligands L1–L4 with BSA.

Compound	𝐾SV (M^−1)	𝑘𝑞 (M^−1s^−1)	𝐾𝑎 (M^−1)	𝑛
L1	3.7×10^4	3.7×10^12	0.98×10^4	0.88
L2	2.6×10^4	2.6×10^12	0.31×10^4	0.814
L3	3.2×10^4	3.2×10^12	0.72×10^4	0.88
L4	1.7×10^4	1.7×10^12	0.11×10^4	0.75