Retention behavior of alkyl-substituted polycyclic aromatic sulfur heterocycle isomers in gas chromatography on stationary phases of different selectivity

Published

January 10, 2017

Author(s)

Walter B. Wilson, Lane C. Sander, Jorge O. Ona Ruales, Stephanie Mossner, Leonard M. Sidisky, Milton Lee, Stephen A. Wise

Abstract

Retention indices for 10 sets of alkyl-substituted polycyclic aromatic sulfur heterocycles (PASHs) isomers (total of 80 PASHs) were determined using gas chromatography with three different stationary phases: a 50% phenyl phase, a 50% liquid crystalline dimethylpolysiloxane (LC-DMPS) phase, and an ionic liquid (IL) phase. Correlations between the retention behavior on the three stationary phases and PASH geometry [length-to-breadth (L/B) and thickness (T)] were investigated for the following PASHs: 4 methyl-substituted dibenzothiophenes (DBTs), 3 ethyl-substituted DBTs, 15 dimethyl-substituted DBTs, 8 trimethyl-substituted DBTs, 15 methyl-substituted naphthothiophenes, 30 methyl-substituted benzonaphthothiophenes, and five methyl-substituted tetraphenothiophenes. Correlation coefficients for retention on the 50% phenyl phase vs L/B ranged from r = -0.28 (MeBbN23Ts) to r = 0.92 (EtDBTs). Correlation coefficients for retention on the IL phase vs L/B ranged from r = 0.13 (MeN12Ts) to r = 0.83 (EtDBTs). Correlation coefficients for retention on the 50% LC-DMPS phase vs L/B ranged from r = 0.22 (MeDBTs) to r = 0.84 (TriMeDBTs).

Citation

Journal of Chromatography A

Pub Type

Journals

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Keywords

gas chromatography, retention indices, stationary phases, shape selectivity, polycyclic aromatic sulfur heterocycles

Citation

Wilson, W. , Sander, L. , Ona, J. , Mossner, S. , Sidisky, L. , Lee, M. and Wise, S. (2017), Retention behavior of alkyl-substituted polycyclic aromatic sulfur heterocycle isomers in gas chromatography on stationary phases of different selectivity, Journal of Chromatography A, [online], https://doi.org/10.1016/j.chroma.2017.01.026 (Accessed October 8, 2024)