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  • 1 Silesian University Institute of Chemistry 9 Szkolna Street 40-006 Katowice Poland
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We have previously discussed in detail thin-layer chromatographic studies of the retention of the 2-arylpropionic acids (2-APA) S -(+)-and S , R -(±)-ibuprofen, S -(+)-naproxen, and S , R -(±)-2-phenylpropionic acid. Chiral TLC was performed on commercial silica gel layers impregnated with l -arginine in the cationic form as chiral ion-pairing reagent. Retention and separation of the species was checked by densitometry.In this paper we report the striking skewed migration of these chiral APA in these TLC systems. Scanning of the chromatographic plates at 1-mm intervals revealed that the tracks of the S -(+) and the R -(−) APA can deviate markedly from the vertical in mutually opposite directions. This striking effect in the two-dimensional separation of the enantiomers is most probably caused by stereospecific intermolecular interactions which occur during ion-pair formation between l -arginine in the cationic form, deposited on the silica gel layer as chiral selector, and each individual 2-APA in the anionic form.

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    Parshad V. , '' (1996 ) 721 J. Chromatogr. A : 369 -372.

  • M. Sajewicz, R. Piętka , and T. Kowalska , J. Planar Chromatogr. 17 (2004) 173–176.

    Kowalska T. , '' (2004 ) 17 J. Planar Chromatogr. : 173 -176.

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    Kowalska T. , '' (2005 ) 28 J. Liq. Chromatogr. Related Technol. : 2499 -2513.

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  • M. Sajewicz, R. Piętka, G. Drabik , and T. Kowalska , J. Liq. Chromatogr. Related Technol. (2006) accepted for publication.

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  • B. Renger (Radolfzell, Germany)
  • I. Vovk (Ljubljana, Slovenia)

 

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  • D. NUROK (Indianapolis, IN, USA)
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  • J. K. RÓŻYŁO (Lublin, Poland)
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Journal of Planar Chromatography - Modern TLC
Language English
Size A4
Year of
Foundation
1988
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per Year
1
Issues
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6
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Springer Nature Switzerland AG
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ISSN 0933-4173 (Print)
ISSN 1789-0993 (Online)

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