Extended Data Fig. 3: Utility of the 2D HSQC-TOCSY experiment for further peak assignment of cellulose derivatives. | Nature Protocols

Extended Data Fig. 3: Utility of the 2D HSQC-TOCSY experiment for further peak assignment of cellulose derivatives.

From: Solution-state nuclear magnetic resonance spectroscopy of crystalline cellulosic materials using a direct dissolution ionic liquid electrolyte

Extended Data Fig. 3

(a) HSQC-TOCSY in the full view allows to further assign the AGA moiety over interactions of the C1 signal with peaks in the crowded areas., (b) HSQC-TOCSY with zoom into the C2–C5 region shows that full characterisation of the spin system can be possible. However, owing to strong superpositions with the AGU, NRE and RE moieties the peak assignments can become tedious. Spectra shown with diffusion-edited 1H trace (top trace) and 13C trace (left trace). AGU = anhydroglucose unit; AGA = anhydroglucopyranosiduronic acid unit; NRE = non-reducing end; RE = reducing end. In the spectra HSQC correlations are shown in green (CH) and blue (CH2) and TOCSY correlations are shown in gray.

Back to article page