Investigating the Selectivity of Triacontyl Interphases.

What causes the shape selectivity of C phases? This question can be answered by combining NMR and fluorescence spectroscopies with HPLC separations at various temperatures. The selectivities depend on the ratio of trans to gauche conformations of the alkyl chains, whose dynamic behavior was characterized with a two-dimensional solid-state NMR spectrum (shown on the right).