The conformation and orientational order of a 1,2-disubstituted ethane nematogenic molecule (I22) in liquid crystalline and isotropic phases studied by NMR spectroscopy.
The structure, conformation and orientational order of the mesogen I22 have been studied by proton, carbon-13 and deuterium 1D and 2D-NMR spectroscopies at natural abundance and at various magnetic fields when in the nematic phase, the isotropic phase close to the nematic-isotropic phase transition, and as a solute in the chiral nematic solution comprised of the polypeptide PBLG dissolved in chloroform. It is concluded that 95% of conformers have a trans arrangement about the central C-C bond of the ethane fragment in all phases.
Emsley
James W
JW
School of Chemistry, University of Southampton, Southampton, UKSO17 1BJ. jwe@soton.ac.uk
Lesot
Philippe
P
Lesage
Anne
A
De Luca
Giuseppina
G
Merlet
Denis
D
Pileio
Giuseppe
G