Fig. 3.
Temperature dependence on CT through (GC)n sequences. (a) Temperature dependence of the time profiles of transient absorption of PTZ•+ for DNA4, monitored at 520 nm during the 355-nm laser flash photolysis of an Ar-saturated solution of NI- and PTZ-modified DNAs at 10 (blue), 28(cyan), and 44°C (pink), respectively. The smooth red curves superimposed on the rise curves are the fit to the kinetic model depicted in Fig. 2a. (b) Effects of temperature on the rate constants for the CT. Plots of ln(khtT0.5) versus T−1 for DNA 4. Rate constants were obtained from a fit with model a (○) and model b (●), respectively.