Variation of anionic moieties of dicationic ionic liquid GC stationary phases: Effect on stability and selectivity
| Autor: | Mohsen Talebi, Daniel W. Armstrong, Rahul A. Patil, Leonard M. Sidisky, Alain Berthod |
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| Přispěvatelé: | Dept Chem & Biochem, University of Texas at Arlington [Arlington], MilliporeSigma, Chromatography & Hyphenated Techniques - Chromatographie et techniques couplées, Institut des Sciences Analytiques (ISA), Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), The Robert A. Welch Foundation (Y0026) is greatly acknowledged for funding this work. A.B. thanks the French Centre National de la Recherche Scientifique for continuous support (CNRS UMR5280) |
| Rok vydání: | 2018 |
| Předmět: |
Anions
Dicationic ionic liquids Chromatography Gas Physicochemical properties Capillary action Ionic Liquids Capillary GC columns 02 engineering and technology 01 natural sciences Biochemistry Analytical Chemistry Viscosity chemistry.chemical_compound PAHs [CHIM.ANAL]Chemical Sciences/Analytical chemistry Cations Environmental Chemistry Organic chemistry Selectivity Thermal stability Polycyclic Aromatic Hydrocarbons ComputingMilieux_MISCELLANEOUS Spectroscopy Polarity Molecular Structure Chemistry Fatty Acids 010401 analytical chemistry Temperature Esters 021001 nanoscience & nanotechnology 0104 chemical sciences FAMEs Ionic liquid Melting point Polar Biodiesel Gas chromatography 0210 nano-technology BAMEs |
| Zdroj: | Analytica Chimica Acta Analytica Chimica Acta, Elsevier Masson, 2018, 1042, pp.155-164. ⟨10.1016/j.aca.2018.07.047⟩ |
| ISSN: | 0003-2670 |
| DOI: | 10.1016/j.aca.2018.07.047 |
| Popis: | Dicationic ionic liquids (DILs) are more and more accepted as a new class of high temperature and polar stationary phases for gas chromatography (GC). This study deals with the effect of seven different fluorosulfonyl derivatized anions associated with two dications: 1,3-di(3-methylimidazolium)-2-methylpropane [2mC3(mim)2], and 1,3-di(3-methylimidazolium)-isobutene [i-eneC4(mim)2]. Thermophysical properties of the 14 synthesized DILs were evaluated in terms of melting point, viscosity, and thermal stability. The optimal physicochemical properties of 13 DILs allowed preparing 13 GC capillary columns. Accordingly, the polarity and selectivity of the DILs were evaluated by determining the Rohrschneider-McReynolds constants and the equivalent chain lengths of C18 fatty acid methyl esters (FAMEs). The symmetrical fluoroalkylsulfonyl and the trifluorosulfonate anions seem to produce the most polar DILs. Compared to classical polyethyleneglycol phases, the DILs showed substantially decreased retention of apolar compounds and a much stronger retention of the polar ones. Unique selectivities were observed with unsaturated FAMEs, polyaromatic hydrocarbons, and bacterial specific FAMEs. The two applications presented included a biodiesel and bacterial FAME analyses. |
| Databáze: | OpenAIRE |
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