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J Chromatogr A

Title:		"A system map for the ionic liquid stationary phase 1,12-di(tripropylphosphonium)dodecane bis(trifluoromethylsulfonyl)imide for gas chromatography"
Author(s):		Lenca N; Poole CF;
Address:		"Department of Chemistry, Wayne State University, Detroit, MI 48202, USA. Department of Chemistry, Wayne State University, Detroit, MI 48202, USA. Electronic address: cfp@chem.wayne.edu"
Journal Title:		J Chromatogr A
Year:		2017
Volume:		20171007
Issue:
Page Number:		138 - 144
DOI:		10.1016/j.chroma.2017.10.015
ISSN/ISBN:		1873-3778 (Electronic) 0021-9673 (Linking)
Abstract:		"The solvation parameter model is used to prepare a system map for the retention of volatile organic compounds on the ionic liquid stationary phase 1,12-di(tripropylphosphonium)dodecane bis(trifluoromethylsulfonyl)imide (SLB-IL60) by gas chromatography over the temperature range 80-280 degrees C. Retention is governed by dispersion, dipole-type and hydrogen-bonding interactions with a different temperature dependence. The hydrogen-bond acidity of the SLB-IL60 column is unexpected since the stationary phase contains no hydrogen-bond acid groups and is not obviously connected to contributions from the deactivated column wall. The polarity number is shown to be a poor indicator of column retention properties. Principal component analysis with the system constants of the solvation parameter model as variables indicates that the properties of SLB-IL60 are not duplicated by any of the common poly(siloxane) and poly(ethylene glycol) stationary phase chemistries in common use for column preparation. The SLB-IL60 column has similar selectivity to a poly(cyanopropylphenyldimethylsiloxane) stationary phase containing 50% cyanopropylphenyl siloxane monomer but the two columns are not selectivity equivalent. Poly(ethylene glycol) stationary phases indicated as most similar to SLB-IL60 based on their polarity numbers are shown to have quite different selectivity"
Keywords:		"Alkanes/chemistry Chromatography, Gas/*methods/standards Imides/*chemistry Ionic Liquids/*chemistry Models, Chemical Polyethylene Glycols/chemistry Column characterization Gas chromatography Retention Selectivity Solvation parameter model System map;"
Notes:		"MedlineLenca, Nicole Poole, Colin F eng Netherlands 2017/10/17 J Chromatogr A. 2017 Nov 24; 1525:138-144. doi: 10.1016/j.chroma.2017.10.015. Epub 2017 Oct 7"