1. Development of Three End-Capped Para-Benzoyl Calix[4,6, or 8]arene Bonded Stationary Phases for HPLC.
- Author
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Hu, Kai, Yu, Ajuan, Zhang, Junqiang, Wen, Fuyong, Liang, Song, Zhao, Xiaolan, Ye, Baoxian, Wu, Yangjie, and Zhang, Shusheng
- Subjects
CARBON compounds spectra ,BENZOYL compounds ,HIGH performance liquid chromatography ,INFRARED spectroscopy ,CHARGE exchange ,CALIXARENES synthesis ,ISOMERS spectra - Abstract
Three end-capped para-benzoyl calixarene bonded silica gel stationary phases are prepared and characterized by elemental analysis, infrared spectroscopy, and thermal analysis. The comparison and selectivity of these phases are investigated by using PAHs, disubstituted benezene, and naphthalene positional isomers as probes. Possible separation mechanism based on the different interactions between calixarenes and analytes are discussed. The results indicate that the separation for those analytes are influenced by the supramolecular interaction including π–π interaction, π-electron transfer interactions, space steric hindrance, and hydrogen bonding interaction on the calixarene columns. Importantly, the aromatic probes with polar groups such as –OH, –NO2, and –NH2 could regulate the selectivity of calixarene-bonded stationary phases. [ABSTRACT FROM PUBLISHER]
- Published
- 2012