Abstract

TEWARI, Brij B.  and  USMANALI, Dropadi. Interaction of DL-histidine, DL-threonine and DL-valine with platinum and tungsten ferrocyanides. Rev. Bol. Quim [online]. 2023, vol.40, n.5, pp.21-28. ISSN 0250-5460.  https://doi.org/10.34098/2078-3949.40.5.3.

Interaction of DL-histidine, DL-threonine and DL-valine with platinum and tungsten ferrocyanides.Adsorptive interaction of DL-histidine, DL-threonine, and DL-valine on platinum and tungsten ferrocyanides were studied at pH range 1.0 - 10.0 and room temperature (30± 1°C). The progress of interaction was followed spectrophotometrically by measuring the absorbance of amino acids solutions at their corresponding λmax. At neutral pH DL-valine and DL-histidine was found to show maximum and minimum adsorption, respectively on both metal ferrocyanides studied. The Langmuir type of adsorption is followed in the concentration range 10-3 to 10-4 M of DL-histidine, DL-threonine, and DL-valine solutions. Present studies suggest the importance of double metal ferrocyanides in the stabilization of biomolecules from degradation on primitive Earth.

Keywords : DL-Histidine; DL-Threonine; DL-Valine; Metal ferrocyanides; Adsorptive interaction; Chemical evolution; Origins of life.

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