Spectroscopic studies of amino acid ionic liquid-supported Schiff bases.

نویسندگان

  • Paula Ossowicz
  • Ewa Janus
  • Grzegorz Schroeder
  • Zbigniew Rozwadowski
چکیده

Amino acid ionic liquid-supported Schiff bases, derivatives of salicylaldehyde and various amino acids (L-threonine, L-valine, L-leucine, L-isoleucine and L-histidine) have been investigated by means of various spectroscopic techniques (NMR, UV-Vis, IR, MS) and deuterium isotope effects on ¹³C-NMR chemical shifts. The results have shown that in all studied amino acid ionic liquid-supported Schiff bases (except the L-histidine derivative) a proton transfer equilibrium exists and the presence of the COO⁻ group stabilizes the proton transferred NH-form.

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عنوان ژورنال:
  • Molecules

دوره 18 5  شماره 

صفحات  -

تاریخ انتشار 2013