NMR reveals coexistence of protonated hairpins and i-motifs. Imino region of 1H NMR spectra of din(sGig2hCt4s),indt(oGs2eCc4o)n2,dda(rGy 2sCtr4u)c4,tuanredfodr(mG2aCti4o)n8 acquired (Fig. 1c). at pH 6.0 and 5 °C was examined in order to obtain deeper All four ...