A novel oriented system made of fatty acid hexagonal phases with tuneable orientation

作者：Douliez Jean Paul^*

来源：Journal of Magnetic Resonance, 2010, 206(1): 171-176.

DOI：10.1016/j.jmr.2010.06.009

• Self assembly
• Solid state NMR
• Hexagonal phase
• Self orientation
• Fatty acid

There is a strong demand in the field of solid state NMR for oriented lipid supramolecular assemblies. This is mainly devoted to biophysical structural studies or materials chemistry because the NMR signal depends on the orientation. Here we report a novel system made of a fatty acid hexagonal phase which self orient in the magnetic field. The orientation occurs within the magnetic field upon cooling the system from its isotropic phase. The cylinders of the hexagonal phase are then oriented parallel to the field. We take advantage that the hexagonal phase is a gel, i.e., the orientation is maintained fixed within the sample tube to investigate the orientational dependence of the deuterium solid state NMR signal using deuterated fatty acids and D(2)O by manually rotating the sample tube within the coil probe. As expected, the oriented signal follows the low vertical bar 3cos(2)0 - 1 vertical bar where 0 is the angle between the long cylindrical axis and the field. We expect this system to be of interest in materials chemistry and structural biology.

• 出版日期2010-9