Journal ArticleDOI
Importance in ligand exchange chromatography of stereoselectivity in the ternary complexes copper(II)-N-substituted l-proline-d/l-α amino acids
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In this paper, the stability constants of ternary complexes involving a copper(II) ion, N-substituted l -proline as soluble model of the active site of the resin and a l or d -α-amino acid have been calculated from potentiometric curves.About:
This article is published in Journal of Inorganic and Nuclear Chemistry.The article was published on 1980-01-01. It has received 8 citations till now. The article focuses on the topics: Ternary operation & Stereoselectivity.read more
Citations
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Journal ArticleDOI
The role of achiral sorbent matrix in chiral recognition of amino acid enantiomers in ligand-exchange chromatography
Vadim A. Davankov,A. A. Kurganov +1 more
TL;DR: A new concept has been developed stating that two interaction points between the resolving agent and the enantiomers are also sufficient for achieving chiral recognition of the latter, provided that the diastereomeric adducts formed by the resolvingAgent with theEnantiomers additionally interact with a non-chiral chromatographic sorbent.
Journal ArticleDOI
Column liquid chromatography
TL;DR: This review covers the fundamental developments in the field of column liquid chromatography during the period of 1984-1985 with an attempt to conserve space, patents and theses have been excluded and only articles published in English, French, German, and Russian with some exceptions have been included.
Book ChapterDOI
Resolution of Optical Isomers by Gas and Liquid Chromatography
TL;DR: The answer to this question is complex, and to discuss it more extensively one should first follow the historical development of resolution methods for racemates as discussed by the authors, which is a good starting point for this paper.
Journal ArticleDOI
The metal complexes of amino acids and their N-substituted derivatives—VI. The physical properties, i.r. spectra and normal coordinate analysis of bivalent metal complexes with dl-threonine
TL;DR: In this paper, the authors have characterized five bivalent metals with dl -threonine by means of i.r. absorption, powder diffuse reflection, and electronic spectra, X-ray diffraction and magnetic susceptibility.
Journal ArticleDOI
Cu(II) and Ni(II) stereocomplexes involved in the separation of α-amino acid enantiomers by ligand exchange chromatography: Stability constants and structural investigations
TL;DR: In this article, the separation mechanism of α-amino acid enantiomers by ligand exchange chromatography on chiral, metal complexed stationary phases has been explained by reaction of isobutyramide and polyacrylamide with Lproline.
References
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Journal ArticleDOI
Miniquad-A general computer programme for the computation of formation constants from potentiometric data.
TL;DR: A new computer programme for the computation of formation constants of complex species in solution is presented, which can be applied to all kinds of potentiometric titration data, including multi-reactant and multi-electrode systems.
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Partial resolution of amino acids by column chromatography on a polystyrene resin containing an optically active copper (II) complex.
Journal ArticleDOI
Complex formation and stereoselectivity in the ternary systems copper(II)–D/L-histidine–L-amino-acids
Glen Brookes,Leslie D. Pettit +1 more
TL;DR: Stereoselectivity is significant in the non-protonated ternary complex, that with ligands of opposite chirality being more stable, and may be explained by simple electrostatic interactions.
Journal ArticleDOI
Use of New Chiral Hydrophilic Gels dor the Direct Resolution α-Aminoacids by High Pressure Liquid Chromatography
TL;DR: In this article, the total resolution of α-aminoacids was achieved by H P L C using porous gels based on acrylamide grafted with chiral substituents (L-α aminoacids) and complexed with metal ions.
Journal ArticleDOI
Liquid chromatographic resolution of racemic β-3,4-dihydroxyphenylalanine
TL;DR: The d and l -isomer sof β-3,4-dihydroxyphenylalanine were effectively resolved by liquid chromatography and verified the importance of “three-point contact” between sorbent and sorbate for resolving these enantiomers.