Fig. 11. Fluorescence quenching spectra of octamer DNA-Hoechst (A–D) and CT DNA-Hoechst (E–H) upon addition of baicalein, chrysin and flavone (0–50 μm) respectively and Stern–Volmer quenching plot of flavones. DNA–Hoechst complex was excited at 343 nm and emission spectra were recorded from 350 to 650 nm.