1H NMR study of the solvent THF concerning their structural and dynamical properties in chemically Li-intercalated SWNT

► Temperature dependent 1H NMR proved the existence of two types of THF in Li intercalated nanotube. ► At low temperatures THF molecules perpendicularly arranged in between adjacent SWNT. ► Exhibit a restricted rotation around their dipolar axis. ► At higher temperatures THF molecules isotropically rotating and diffusing along the interstitial channels of the SWNT.