Fields of Research, NMR of Oriented Molecules

Anisotropy of Shielding

  • Origin of Chemical Shift Anisotropy
  • Theory of Chemical Shift Anisotropy
  • Calculations of Chemical Shift Anisotropy
  • Determination Methods of Chemical Shift Anisotropy
    • by use of nematic-isotropic phase transition
    by gradient method (varying the temperature or the concentration of the sample)
    by use of smectic liquid crystals
    by use of chiral mesophases
    by sample rotation
    by use of electric field
    by mixing of two thermotropic nematic LCs with opposite diamagnetic anisotropies
    by use of temperature dependence of the chemical shift anisotropy
  • Comparison of Methods
  • Chemical Shift Anisotropy Data
    • C   Cd   Cs   F   H   Hg   N   Na   P   Se   Te
  • Comparison with Theory
  • Referencing Methods
  • Induced Chemical Shift Anisotropy
  • ?
    		•

    Origin of Chemical Shift Anisotropy

    The anisotropic orientational distribution of solute molecules in liquid crystals makes it possible to use the NMR observables for the determination of the anisotropies of nuclear shielding.
    (see ..........)

    Return to "NMR of Oriented Molecules"

    Last Update: April 22th, 1997
    By: Alexan Shahatuni (msrc@moon.yerphi.am)