π-Selective stationary phases: (II) Adsorption behaviour of substituted aromatic compounds on n-alkyl-phenyl stationary phases

Stevenson, Paul G., Gritti, Fabrice, Guiochon, Georges, Mayfield, Kirsty J., Dennis, Gary R. and Shalliker, R. Andrew 2010, π-Selective stationary phases: (II) Adsorption behaviour of substituted aromatic compounds on n-alkyl-phenyl stationary phases, Journal of chromatography A, vol. 1217, no. 33, pp. 5365-5376.

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Title π-Selective stationary phases: (II) Adsorption behaviour of substituted aromatic compounds on n-alkyl-phenyl stationary phases
Formatted title π-Selective stationary phases: (II) Adsorption behaviour of substituted aromatic compounds on n-alkyl-phenyl stationary phases
Author(s) Stevenson, Paul G.
Gritti, Fabrice
Guiochon, Georges
Mayfield, Kirsty J.
Dennis, Gary R.
Shalliker, R. Andrew
Journal name Journal of chromatography A
Volume number 1217
Issue number 33
Start page 5365
End page 5376
Total pages 12
Publisher Elsevier BV
Place of publication Amsterdam, The Netherlands
Publication date 2010-08-13
ISSN 0021-9673
1873-3778
Keyword(s) adsorption isotherms
frontal analysis
phenyl type
ring orientation
stationary phase
Summary The frontal analysis method was used to measure the adsorption isotherms of phenol, 4-chlorophenol, p-cresol, 4-methoxyphenol and caffeine on a series of columns packed with home-made alkyl-phenyl bonded silica particles. These ligands consist of a phenyl ring tethered to the silica support via a carbon chain of length ranging from 0 to 4 atoms. The adsorption isotherm models that fit best to the data account for solute–solute interactions that are likely caused by π–π interactions occurring between aromatic compounds and the phenyl group of the ligand. These interactions are the dominant factor responsible for the separation of low molecular weight aromatic compounds on these phenyl-type stationary phases. The saturation capacities depend on whether the spacer of the ligands have an even or an odd number of carbon atoms, with the even alkyl chain lengths having a greater saturation capacity than the odd alkyl chain lengths. The trends in the adsorption equilibrium constant are also significantly different for the even and the odd chain length ligands.
Language eng
Field of Research 030108 Separation Science
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2010, Elsevier B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30047994

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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