We are investigating the selectivity of Zeolite NaY in enhancing the relative abundance of one enantiomer over the other in the adsorption of D, L and DL N-acetyl methionine.  13C CPMAS spectrum of D- and L-N-acetyl methionine exhibit peaks at 170, 55 and 30ppm for the carbonyl, a andb carbons respectively, while the racemic mixture shows a second peak for the carbonyl group at 165 ppm implying that the latter crystallizes as a racemic compound. This gives reason to speculate an increased tendency for heterodimer adsorption onto the zeolite. Thermogravimetric analysis and powder X-ray diffraction techniques have been used to explain the microenvironments of adsorbed amino acids.  A new avenue to enantiomeric enrichment in zeolites is important for the study of prebiotic development of enantiomeric purity. Furthermore, this mechanism can be useful for the pharmaceutical industry where enantiomeric purity is important.

Identification of D, L, and DL n-acetyl methionine interactions in Zeolite NaY

243rd National Meeting (2012)

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