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Publication Detail
Chiral Interactions of Histidine in a Hydrated Vermiculite
  • Publication Type:
    Journal article
  • Publication Sub Type:
  • Authors:
    Fraser DG, Greenwell HC, Skipper NT, Smalley MV, Wilkinson MA, Demé B, Heenan RK
  • Publisher:
    Royal Society of Chemistry
  • Publication date:
  • Place of publication:
  • Pagination:
    825, 830
  • Journal:
    Physical Chemistry Chemical Physics
  • Volume:
  • Status:
  • Country:
  • Print ISSN:
  • Notes:
    5 Pages, 5 Figures
Recent work suggests a link between chiral asymmetry in the amino acid iso-valine extracted from the Murchison meteorite and the extent of hydrous alteration. We present the results of neutron scattering experiments on an exchanged, 1-dimensionally ordered n-propyl ammonium vermiculite clay. The vermiculite gel has a (001) d-spacing of order 5nm at the temperature and concentration of the experiments and the d-spacing responds sensitively to changes in concentration, temperature and electronic environment. The data show that isothermal addition of D-histidine or L-histidine solutions produces shifts in the d-spacing that are different for each enantiomer. This chiral specificity is of interest for the question of whether clays could have played an important role in the origin of biohomochirality.
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