Chiral separation of dansyl-DL-amino acids with micellar systems containing copper (II) ion andN-n-dodecyl-L-proline in electrokinetic capillary chromatography
“…Only a single 220 communication on their use over the past several years documents that these selectors have lost their practical importance in free-solution separations. In micellar separation systems they are used more frequently. − However, compared with the number of chiral micellar separations, they are of minor importance.…”
Section: F Other Chiral Selectorsmentioning
confidence: 99%
“…35 min (Figure ). The ligand- exchange mechanism is effective in the separation of dansyl derivatives of amino acids using a running buffer containing the Cu(II) complex of N , N -didecyl- d -alanine together with sodium dodecyl sulfate micelles 221 as well as in other micellar separations with the participation of the ligand-exchange mechanism. − 23 Separation of sterically different forms of nine polychlorinated biphenyls, identified by their numbers, by micellar electrokinetic chromatography using γ-cyclodextrin as the selector. Background electrolyte: 100 mM 2-( N -cyclohexylamino)ethanesulfonic acid (CHES) pH 10.0, 2 M urea, 110 mM sodium dodecyl sulfate, and 5 mM γ-cyclodextrin; 45° C. For other details, see ref .…”
In capillary zone electrophorsis, he is currently interested in the investigation of interactions of dissolved species and in the analytical utilization of these interactions. His activity in liquid chromatography is oriented to the generation of streaming current inside chromatographic column and to methods for the utilization of this effect.
“…Only a single 220 communication on their use over the past several years documents that these selectors have lost their practical importance in free-solution separations. In micellar separation systems they are used more frequently. − However, compared with the number of chiral micellar separations, they are of minor importance.…”
Section: F Other Chiral Selectorsmentioning
confidence: 99%
“…35 min (Figure ). The ligand- exchange mechanism is effective in the separation of dansyl derivatives of amino acids using a running buffer containing the Cu(II) complex of N , N -didecyl- d -alanine together with sodium dodecyl sulfate micelles 221 as well as in other micellar separations with the participation of the ligand-exchange mechanism. − 23 Separation of sterically different forms of nine polychlorinated biphenyls, identified by their numbers, by micellar electrokinetic chromatography using γ-cyclodextrin as the selector. Background electrolyte: 100 mM 2-( N -cyclohexylamino)ethanesulfonic acid (CHES) pH 10.0, 2 M urea, 110 mM sodium dodecyl sulfate, and 5 mM γ-cyclodextrin; 45° C. For other details, see ref .…”
In capillary zone electrophorsis, he is currently interested in the investigation of interactions of dissolved species and in the analytical utilization of these interactions. His activity in liquid chromatography is oriented to the generation of streaming current inside chromatographic column and to methods for the utilization of this effect.
“…A significant improvement in resolution is generally attained upon addition of the SDS surfactant to the electrolyte to perform the LE‐MEKC mode 1, 2, 8–12. In such system, the SDS micelles form an achiral pseudostationary phase while the central ion –ligand complex is employed as a CE chiral additive.…”
Being single (crystalline): Four single‐crystalline‐phase Mo3VOx materials are utilized as catalysts for the partial oxidation of acrolein to acrylic acid. The crystalline structure has a clear effect on catalytic performance. Mo3VOx with a trigonal crystalline structure is the most efficient catalyst: 99.8 % conversion with 93.9 % selectivity for acrylic acid is obtained at a temperature (217.3 °C) much lower than that previously reported.
“…Metal complexes incorporated in a micellar pseudostationary phase were also used for enantiomeric separations. Enantiomers of dansylamino acids were resolved using chiral copper (II)-N-n-dodecyl-L-proline and SDS [177].…”
This paper provides an overview of the current status of chiral capillary electrophoresis (CE). The emphasis is placed on the application of CE in chiral separation of various racemic compounds. During the last two years about 280 papers, several review articles, and two entire issues, edited by S. Fanali (Electrophoresis 1999, 20, 2577-2798, and H. Nishi and S. Terabe (J. Chromatogr. A 2000, 879, 1-471.) have been devoted to chiral CE. Enantiomeric separations of various compounds, e.g., pharmaceuticals, drug candidates, drugs and related metabolites in biological fluids, amino acids, di- and tri peptides, pesticides and fungicides, have been performed using different chiral selectors. Native and derivatized cyclodextrins continue to be the most widely used chiral selectors. Other chiral selectors such as natural and synthetic chiral micelles, crown ethers, chiral ligands, proteins, oligo- and polysaccharides, and macrocyclic antibiotics have also been applied to chiral CE separations.
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