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Capillary gas chromatographic separation of C10-C12 secondary phenylalkanes on modified cyclodextrin stationary phases

✍ Scribed by Špáanik, Ivan ;Krupcik, Jáan ;Skacáani, Ivan ;De Zeeuw, Jaap ;Galli, Mario ;Sandra, Pat

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
481 KB
Volume
20
Category
Article
ISSN
0935-6304

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✦ Synopsis

Abstract

The separation of isomers and enantiomers of branched C~10~‐C~12~ phenylalkanes by gas chromatography on fused silica capillary columns coated with some modified β‐ and γ‐cyclodextrins was studied. It was shown that the separation of positional isomers of C~10~‐C~12~ phynylalkanes on modified cyclodextrin capillary columns is not better than that on a column coated with modified polyethylene glycol. Differences were found in the enantioselectivity of modified β‐ and γ‐cyclodextrins for the separation of C~10~‐C~12~ secondary phenylalkane enantiomers. While alkylderivatives of β‐CDs resolve enantiomers of 3‐phenylalkanes, alkyl derivatives of γ‐CD resolve enantiomers of 2‐phenylalkanes. Since shape selectivity factors of modified cyclodextrins have indicated no inclusion of the considered solutes in cyclodextrin cavities, enantioselective interactions most probably occur on the outer sphere of cyclodextrins.

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