title: Preparation and characterization of a new p-tert-butyl-calix[8]arene-bonded stationary phase for high-performance liquid chromatography.
abstract: A new p-tert-butyl-calix[8]arene-bonded silica gel stationary phase (CABS) was prepared via 3-glycidoxypropyltrimethoxysilane as a coupling reagent for HPLC. Its structure was characterized by diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), elemental analysis and thermal analysis. The chromatographic performance of new packing was evaluated by using basic, acidic and neutral aromatic compounds as probes compared with conventional ODS. The results show that the new stationary phase has an excellent reversed-phase property and high selectivities for substituted aromatics compared with ODS, because CABS can provide various sites for the analytes, such as hydrogen-bonding interactions, pi-pi interactions, and inclusion complex, besides hydrophobic interactions.
authors.affiliation: Department of Chemistry, Wuhan University, Wuhan 430072, P R China.
authors.forename: Lai-Sheng
authors.initials: LS
authors.lastname: Li
authors.forename: Shi-Lu
authors.initials: SL
authors.lastname: Da
authors.forename: Yu-Qi
authors.initials: YQ
authors.lastname: Feng
authors.forename: Min
authors.initials: M
authors.lastname: Liu