𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Ordering in the nematic mesophase of a rapidly spinning sample

✍ Scribed by R. Teeäär; M. Alla; E. Lippmaa

Publisher
John Wiley and Sons
Year
1982
Tongue
English
Weight
363 KB
Volume
19
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The high resolution ^13^C NMR spectrum of an eutectic mixture of N‐(p‐methoxybenzylidene)‐p‐n‐butylaniline and N‐(p‐ethoxybenzylidene)‐p‐n‐butylaniline has been measured as a function of the spinning angle θ between the rotor axis and the magnetic field. The influence of a strong magnetic field and rapid sample spinning gives rise to a specific orientation of this nematic mesophase; if 0 < θ < 54°44′; the director of the nematic phase is oriented in parallel with the rotor axis, and if 54°44′; < θ <90° it is perpendicular to the rotor axis. At the exact magic angle a nematic sample displays the chemical shifts of the corresponding isotropic liquid. Nematic order is retained at all other director‐field angle values, thus allowing chemical shift anisotropy measurements of the nematic sample or of compounds dissolved therein.

📜 SIMILAR VOLUMES

Separation of isotropic from anisotropic
Separation of isotropic from anisotropic interactions in the NMR spectra of solutes dissolved in nematic mesophases by using slow sample rotation
✍ J.W. Emsley; J.C. Lindon 📂 Article 📅 1974 🏛 Elsevier Science 🌐 English ⚖ 357 KB

The \*'F nuclear magnetic resonance spectrum of trifluoroacetic acid dissolved in a nematic mesophase has been measured as a function of spinning speed. From the spectra of molecules containing one 13C nucleus it is possible to determine the magnitudes of 'J,-F and 'JCF in the nematic phase, and the

Motion of the director in a spinning nem
Motion of the director in a spinning nematic subject to a static magnetic field
✍ J.W. Emsley; S.K. Khoo; J.C. Lindon; G.R. Luckhurst 📂 Article 📅 1981 🏛 Elsevier Science 🌐 English ⚖ 391 KB

## WC hwe measured the deuterwm NXIR spectrum for the nematlc phase of chaln-dcuterlated I-dl,-n~ctsl~'-cyanoblphenyl as a function of sample spmnlng speed. Above speeds of = 20 Hz the spectrum nssocmted wth the methyl group contams rotatlonal satelhte hnes Spectral slmulatlon shows that the duect

An investigation of the dynamics of CH3I
An investigation of the dynamics of CH3I in a nematic mesophase by NMR linewidth analysis
✍ D. Imbardelli; G. Chidichimo 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 458 KB

Relaxation mechanism acting on CHsI dissolved in a nematic mesophase were studied by linewidth analysis of 'H and 13C NMR spectra. Intramolecular and intermolecular dipolar interaction fluctuations were found to be the most important relaxation phenomena responsible for the line broadening.