A 13C NMR study of the molecular dynamics and phase transition of confined benzene inside titanate nanotubes.

摘要: This work investigated the nanoconfinement effect on molecular dynamics and phase transition of confined benzene inside titanate nanotubes with a uniform inner diameter approximately 5.3 nm. For 13C-enriched organics, 13C nuclear spin-spin relaxation was demonstrated as sensitive tool to differentiate translational motion reorientation and, thus, shown be advantageous over commonly employed 1H 2H NMR for studying complex diagram, specifically, separating behavior reorientation. In such an approach, melting explicitly observed take place in broad temperature range below bulk temperature. The abrupt change time liquid at about 260 K suggested that induced two topologically distinct phases.