“…The diffusion-control behavior was evident from the linear plot of the voltammetric response as a function of ν 1/2 . From the slope of the obtained line, diffusion coefficient for free AZT (D f ) was calculated as 5.86× 10 -5 cm 2 s -1 , whereas for the AZT-DNA complex, D b was reduced to 2.90 × 10 -5 cm 2 s -1 .The negative shift in potential of C 1 during successive additions of DNA, confirms the nonintercalative nature of the interaction, indeed it refers to electrostatic interactions with DNA[21,[25][26][27][28].…”