Spatially Resolved Anisotropic Natural Abundance Deuterium 2D-NMR Spectroscopy Using Bimesophasic Lyotropic Chiral Systems.

ABSTRACT

In this paper, we describe, for the first time, the combined and original use of spatially resolved anisotropic natural abundance deuterium (ANAD) 2D-NMR experiments and bimesophasic lyotropic chiral systems to extract two independent sets of anisotropic parameters such as 2H-RQCs from a single NMR sample. As a pioneering example, we focus on a mixture of immiscible polypeptides (PBLG) and polyacetylene helical polymers (L-MSP) dissolved in weakly polar organic solvents (chloroform). Nondeuterated (D)-(+)-camphor is used as a model chiral solute. By providing two series of 2H-RQCs, this new analytical approach paves the way for applications in 3D structure elucidation with increased reliability and also opens up original investigations in terms of spectral enantiomeric discriminations and mixing of helical polymers.