Figure 4.

CD spectra of SWNTs–dT₂₂·dA₂₂. (a) SWNTs–dT₂₂·dA₂₂ in the absence or presence of coralyne at 4°C prior to heating. (b) Spectra of SWNTs–dT₂₂·dA₂₂ in the presence of coralyne at 45°C. (c) Heat-cycled spectrum of disproportioned SWNTs–dT₂₂·dA₂₂ sample in the presence of coralyne at 4°C. (d) CD melting profiles for SWNTs–dT₂₂·dA₂₂ samples at 274 nm to show structural transitions: first time (black line) and second time heating (red line) of SWNTs–dT₂₂·dA₂₂ after the addition of coralyne.