Characterization of 1,3-alternate calixarene-silica bonded stationary phases and their comparison to selected commercial columns by using principal component analysis
Twelve calixarene stationary phases in 1,3-alternate conformation, synthesized in the authors laboratory, were characterized in terms of their surface coverage, hydrophobic selectivity, aromatic selectivity, shape selectivity, hydrogen bonding capacity and ion-exchange capacity. The set of tests commonly used for evaluation of commercially available stationary phases was applied to assess fundamental chromatographic properties of the calixarene phases. The new calixarene phases were compared to each other, to Caltrex and LiChrosorb C-18 columns. Principal component analysis has been used to provide comparison between 1,3-alternate calixarene phases and commercially available phenyl as well as, fluorophenyl and fluoroalkyl columns.
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