π-Selective stationary phases: (I) Influence of the spacer chain length of phenyl type phases on the aromatic and methylene selectivity of aromatic compounds in reversed phase high performance liquid chromatography

Stevenson, Paul G., Mayfield, Kirsty J., Soliven, Arianne, Dennis, Gary R., Gritti, Fabrice, Guiochon, Georges and Shalliker, R. Andrew 2010, π-Selective stationary phases: (I) Influence of the spacer chain length of phenyl type phases on the aromatic and methylene selectivity of aromatic compounds in reversed phase high performance liquid chromatography, Journal of chromatography A, vol. 1217, no. 33, pp. 5358-5364.

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Title π-Selective stationary phases: (I) Influence of the spacer chain length of phenyl type phases on the aromatic and methylene selectivity of aromatic compounds in reversed phase high performance liquid chromatography
Author(s) Stevenson, Paul G.
Mayfield, Kirsty J.
Soliven, Arianne
Dennis, Gary R.
Gritti, Fabrice
Guiochon, Georges
Shalliker, R. Andrew
Journal name Journal of chromatography A
Volume number 1217
Issue number 33
Start page 5358
End page 5364
Total pages 7
Publisher Elsevier BV
Place of publication Amsterdam, The Netherlands
Publication date 2010-08-13
ISSN 0021-9673
1873-3778
Keyword(s) aromatic selectivity
linear PAHs
methylene selectivity
n-Alkylbenzenes
phenyl type stationary phase
Summary Phenyl type stationary phases of increasing spacer chain length (phenyl, methyl phenyl, ethyl phenyl, propyl phenyl and butyl phenyl, with 0–4 carbon atoms in the spacer chain, respectively) were synthesised and packed in house to determine the impact that the spacer chain length has on the retention process. Two trends in the aromatic selectivity, qaromatic, were observed, depending on whether the number of carbon atoms in the spacer chain is even or odd. Linear log k′ vs ϕ plots were obtained for each stationary phase and the S coefficient was determined from the gradient of these plots. For the phenyl type phases, the S vs nc plots of the retention factors of linear polycyclic aromatic hydrocarbons vs the number of rings exhibit a distinct discontinuity that between 3 and 4 rings, which increases with increasing spacer chain length for even phases but decreases for odd phases. Accordingly, we suggest that the retention factors depend differently on the number of carbon atoms in the spacer chain depending on whether this number is even or odd and that this effect is caused by different orientations of the aromatic ring relative to the silica surface.
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:30047996

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