Silica-bonded calixarenes in chromatography

Brindle, Rainer; Albert, Klaus; Harris, Stephen J.; Tröltzsch, Christof; Horne, Elizabeth; Glennon, Jeremy D.

doi:10.1016/0021-9673(95)01079-3

Cited by 68 publications

(24 citation statements)

References 4 publications

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“…However, these methods generally afford uncertain information of the stationary phases. Recently, 13C solid state NMR has become a powerful tool for the structure characterization of the bonded-silica stationary phase [20][21][22] …”

Section: Introductionmentioning

confidence: 99%

Preparation and evaluation ofp-tert-butyl-calix[4]arene-bonded silica stationary phases for high performance liquid chromatography

Xiao

Feng

et al. 1999

Chromatographia

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SummaryA new method is proposed for preparation of a p-tertbutyl-calix[4]arene-bonded silica stationary phase. The chemically modified p-tert-butyl-calix [4]arene is attached to silica gel via the silane coupling reagent 7-(ethylenediamino)-propyl-triethoxyl-silane. The bonded phase has been characterized by 29Si and 13C cross polarization/magic angle spinning solid-state nuclear magnetic spectrometry. The retention behavior of polycyclic aromatic hydrocarbons (PAHs), nucleosides and bases has been investigated on the bonded phase in the reversed-phase mode.

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Section: Introductionmentioning

confidence: 99%

Preparation and evaluation ofp-tert-butyl-calix[4]arene-bonded silica stationary phases for high performance liquid chromatography

Xiao

Feng

et al. 1999

Chromatographia

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“…Brindle et al characterised silica-bonded calixarene phases using 29 Si and 13 C solidstate NMR. This characterisation method provided direct evidence for the attachment of the macrocyclic calixarenes to the silica 38 .…”

Section: Calixarenes As Stationary Phasesmentioning

confidence: 97%

Important calixarene derivatives – their synthesis and applications

McMahon¹,

O'Malley²,

Nolan³

et al. 2003

Arkivoc

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Since their discovery as by-products in the phenol-formaldehyde condensation to prepare bakelites, the calixarenes have gained much attention for their application as both surfactants and chemoreceptors. The McKervey group has been a leader in the development and synthesis of new and novel calixarenes for use as ion-complexing agents as well as for use in many other applications. Many calixarene derivatives prepared by the McKervey group are being used in both environmental and biomedical monitoring. This review covers both the synthesis and sensor applications of the various calixarenes developed by the McKervey group over the past two decades, with emphasis on metal cation detection.

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“…This procedure is described in [51], resulting in a monomolecular coverage of the silica surface. Other methods for calixarene silica surface modification are given by Glennon and co-workers in [52,53] In case of Caltrex s Science materials, a 50:50 w/w mixture of calix [4]arenes and p-tert-butylcalix [4]arenes was used for the modification of the silica gel. Thus, both selectivities of unmodified and modified calix [4]arenes are combined in one material.…”

Section: Synthetic Approachmentioning

confidence: 99%

Characterization of calixarene‐bonded stationary phases

Schneider

Menyes²,

Jira

2010

J of Separation Science

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Calixarene-bonded stationary phases received growing interest in HPLC as stationary phases with special retention characteristics and selectivity. The commercially available unsubstituted and p-tert-butyl-substituted Caltrex(®) columns have been intensively studied and characterized in our workgroup. They can be used as reversed phases, yet they support additional interactions. Especially, their steric, polar and ionic properties differ from conventional alkyl-bonded phases. However, also the hydrophobic interaction shows differences since adsorption and partition interactions on or in a bonded layer of calixarenes are not similar to those of alkyl-bonded layers. The relative strength of the hydrophobic properties of the stationary phases has been found depending on the methanol concentration of the mobile phase. Generally, the dependencies of their interaction strengths on mobile-phase conditions, e.g. the change of the intensity of the hydrogen-bonding abilities with decreasing methanol content, are not similar from phase to phase either. This probably gives calixarene-bonded stationary phases enhanced suitability for analyses at extreme compositions of the mobile phase. An overview about the synthesis, retention and selectivity properties of Caltrex(®) columns is given here.

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Silica-bonded calixarenes in chromatography

Cited by 68 publications

References 4 publications

Preparation and evaluation ofp-tert-butyl-calix[4]arene-bonded silica stationary phases for high performance liquid chromatography

Preparation and evaluation ofp-tert-butyl-calix[4]arene-bonded silica stationary phases for high performance liquid chromatography

Important calixarene derivatives – their synthesis and applications

Characterization of calixarene‐bonded stationary phases

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