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

Article Abstract:

The nanoconfinement effect is investigated on the molecular dynamics and phase transition of confined benzene inside titanate nanotube with a uniform inner diameter of ~5.3 nm. The abrupt change of the (super 13)C nuclear spin-spin relaxation time of the confined liquid benzene at about 260 K indicated that the nanoconfinement induced two topologically distinct liquid phases.

Science & research, Petrochemical Manufacturing, Benzene, Research, Molecular dynamics, Spectra, Nanotubes

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Powder crystallography by proton solid-state NMR spectroscopy

Article Abstract:

The investigation on (super 1)H-(super 1)H spin-diffusion build-up curves shows that high-resolution magic angle spinning NMR of protons, applied to powdered organic compounds, provides a method to probe crystalline arrangements. The comparison between experimental (super 1)H data and simulation is shown to depend strongly on the parameters of the crystal structure.

Crystallography, Protons, Properties

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Conservation of (mu)s-ms enzyme motions in the apo- and substrate-mimicked state

Article Abstract:

A comparison of (mu)s-ms dynamics in RNase A in the apo form and as complexed to the substrate-mimic, pTppAp is made by using solution NMR spin-relaxation experiments. The RNase A/pTppAp complex's crystal structure is determined and it shows that this ligand binds at the active site and utilizes established substrate binding sites in its interaction with RNase.

RNA, Crystals, Crystal structure, Chemical properties

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