Headgroup motion in a lytotropic lamellar phase by Deuterium and nitrogen-14 relaxation studies

Article Abstract:

Deuterium ((super 2)H) and nitrogen-14 ((super 14)N) NMR spectroscopy were used to investigate the molecular dynamics of a lyotropic liquid crystal. Lower activation energy for the spinning motion than that of the tumbling motion shows that it is relatively easier for molecules to rotate while they are loosely anchored on water and even though the quadrupolar coupling of (super 14)N nucleus could be relatively large, under suitably motional averaging in lytropic systems it can be studied by (super 14)N NMR to provide both static and dynamic information.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Nitrogen Compounds, Relaxation (Nuclear physics)

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NMR determination of smectic ordering of probe molecules

Article Abstract:

A study analyzes and describes the NMR spectra of the ortho-, meta-, and para-dichlorobenzene solutes to provide two oriental order parameters, namely nematic and smectic for each of the solute in the A phases of the liquid crystals. The analysis reveals that in both the solute smectic constant is negative for both the smectic A solvents, which shows that ortho and para solutes prefer the interlayer region, in contrast to the meta solute that gets evenly distributed.

Electronic components, not elsewhere classified, Other Electronic Component Manufacturing, Industrial Organic Chemicals, Cyclic Crude and Intermediate Manufacturing, Dichlorobenzene, Liquid Crystals, Chemical properties, Report

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Interlayer self-diffusion and structure of chiral smetic phases studied by (super 2)HNMR exchange experiment

Article Abstract:

The chiral smetic C (SmC) and chiral subphases of a smectogen is studied with the help of a deuterium to-dimensional exchange NMR technique. This method is used to obtain a fats translational self-diffusion constant along the helical pitch in the SmC phase and to explain the structure of helicoidal superalttice in the chiral subphases with different layers.

Nuclear magnetic resonance, Carboxyl compounds

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