Imagine having a large porphyrin looking molecule where one of the nitrogen is made more negatively charged artificially by e.g. application of an electric field. Now place in the centre hole of the porphyrin molecule a molecule of L-alanine. Put the above sample into an NMR.

Now repeat the above experiment with D-alanine instead. I will expect the NMRs of the two to look very different as the stereocentre at the beta carbon will mean that e.g. the N of one of the enantiomer will be closer to the anisotropic environment introduced by the electronics of the tampered polyphyrin molecule comp…