Molecules 2013, 18(5), 4986-5004; doi:10.3390/molecules18054986
Article

Spectroscopic Studies of Amino Acid Ionic Liquid-Supported Schiff Bases

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Received: 22 February 2013; in revised form: 8 April 2013 / Accepted: 17 April 2013 / Published: 29 April 2013
(This article belongs to the Special Issue Isotope Effects)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: 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.
Keywords: amino acid ionic liquids; Schiff bases; deuterium isotope effect; intramolecular hydrogen bond
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MDPI and ACS Style

Ossowicz, P.; Janus, E.; Schroeder, G.; Rozwadowski, Z. Spectroscopic Studies of Amino Acid Ionic Liquid-Supported Schiff Bases. Molecules 2013, 18, 4986-5004.

AMA Style

Ossowicz P, Janus E, Schroeder G, Rozwadowski Z. Spectroscopic Studies of Amino Acid Ionic Liquid-Supported Schiff Bases. Molecules. 2013; 18(5):4986-5004.

Chicago/Turabian Style

Ossowicz, Paula; Janus, Ewa; Schroeder, Grzegorz; Rozwadowski, Zbigniew. 2013. "Spectroscopic Studies of Amino Acid Ionic Liquid-Supported Schiff Bases." Molecules 18, no. 5: 4986-5004.

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