title: A novel sorbent for chromatographic separations: a silica matrix modified with non-covalently bonded tetrakis(β-cyclodextrin)-porphyrin conjugates.
abstract: We prepared new phases for LC that consisted of silica modified with non-covalently bonded tetrakis(β-cyclodextrin)-porphyrin (where cyclodextrin is CD) conjugates. The effects of the porphyrin core, type of spacer and β-CD moieties on the behaviours of the modified phases for the separation of aromatic compounds (benzene, toluene, ethylbenzene, propylbenzene, butylbenzene, pentylbenzene, o-terphenyl, triphenylene, phenol and caffeine) and fluorinated aromatic compounds (pentafluorobenzonitrile, pentafluoronitrobenzene and hexafluorobenzene) were studied using the Tanaka test. The results indicate that the non-covalent substitution of silica with CD-based macromolecules that have a porphyrin core can be a very effective method for preparing novel sorbents with specific chromatographic properties for applications in LC.
authors.affiliation: Department of Analytical Chemistry, Faculty of Chemical Engineering, Institute of Chemical Technology, Prague, Czech Republic.
authors.forename: Zdeněk
authors.initials: Z
authors.lastname: Kejík
authors.forename: Robert
authors.initials: R
authors.lastname: Kaplánek
authors.forename: Jakub
authors.initials: J
authors.lastname: Rak
authors.forename: Marie
authors.initials: M
authors.lastname: Plátová
authors.forename: Magda
authors.initials: M
authors.lastname: Vosmanská
authors.forename: Pavel
authors.initials: P
authors.lastname: Martásek
authors.forename: Vladimír
authors.initials: V
authors.lastname: Král
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation*; D008958:Models, Molecular; D011166:Porphyrins / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D047392:beta-Cyclodextrins / Q000737:chemistry*
chemical_list: D011166:Porphyrins; D047392:beta-Cyclodextrins; D012822:Silicon Dioxide; C031215:betadex
keywords: Chromatography; Cyclodextrin-porphyrin conjugates; Hydrophobic interaction; Non-covalently modified silica; Tanaka test