Identifying important structural features of ionic liquid stationary phases for the selective separation of nonpolar analytes by comprehensive two-dimensional gas chromatography

Zhang, Cheng; Ingram, Isaiah C.; Hantao, Leandro Wang; Anderson, Jared L.

doi:10.1016/j.chroma.2015.01.074

Cited by 32 publications

(18 citation statements)

References 42 publications

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“…22 MILs have also drawn attention due to their low volatility, making them environmentally-friendly and suitable for high temperature applications such as solvents for organic synthesis, 14,15 and gas-liquid chromatography. 23,24 It has been observed that both the cation and anion components have a significant contribution towards the thermal stability of MILs. For example, Nacham et al found that ammonium-based MILs had significantly lower thermal stability than dicationic imidazolium-based MILs.…”

Section: Introductionmentioning

confidence: 99%

Investigating the effect of ligand and cation on the properties of metal fluorinated acetylacetonate based magnetic ionic liquids

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Investigating the effect of ligand and cation on the properties of metal fluorinated acetylacetonate based magnetic ionic liquids

et al. 2019

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“…The PIL structure in Fiber 2 contains a long free alkyl side chain, increasing the ability to engage in non-specific dispersive interactions with aliphatic hydrocarbons [54]. The chemistry of Fiber 3 also contains a long alkyl side chain, but its cation is functionalized with a benzyl moiety, enabling the establishment of π-π interactions with aromatic VOCs [9]. Furthermore, all PILbased SPME coatings exhibited excellent extraction of alcohols and fatty acids from the wine-diluted sample, as illustrated in Table 1.…”

Section: Resultsmentioning

confidence: 99%

“…Hence, the sorbent phase must exhibit multiple solvation characteristics to effectively enhance the profile of extracted analytes from food matrices, such as wine. Until the past decade, most SPME methods employed poly(dimethylsiloxane) (PDMS), poly(acrylate) (PA), divinylbenzene (DVB), Carboxen®based extractants for VOC isolation, which exhibited limited sorbent properties [9]. Thereby, new phases with unique selectivity are urgently needed.…”

Section: Introductionmentioning

confidence: 99%

“…Polymeric ionic liquids (PIL) are a promising class of sorbent coatings for SPME that exhibits unique selectivity by combining multiple solvation properties [9][10][11][12][13][14]. The PIL may be structurally tuned to impart desirable characteristics by carefully grafting substituents to the cationic/anionic moieties or by interchanging the combination of ion pairs [15].…”

Section: Introductionmentioning

confidence: 99%

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Characterization of the aroma profile of novel Brazilian wines by solid-phase microextraction using polymeric ionic liquid sorbent coatings

et al. 2018

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In this study, a series of polymeric ionic liquid (PIL) sorbent coatings is evaluated for the extraction of polar volatile organic compounds (VOCs) from Brazilian wines using headspace solid-phase microextraction (HS-SPME), including samples from 'Isabella' and 'BRS Magna' cultivars-the latter was recently introduced by the Brazilian Agricultural Research Corporation - National Grape & Wine Research Center. The structurally tuned SPME coatings were compared to the commercial SPME phases, namely poly(acrylate) (PA) and divinylbenzene/carboxen/poly(dimethylsiloxane) (DVB/CAR/PDMS). The separation, detection and identification of the aroma profiles were obtained using comprehensive two-dimensional gas chromatography mass spectrometry (GC×GC-MS). The best performing PIL-based SPME fiber, namely 1-hexadecyl-3-vinylimidazolium bis[(trifluoromethyl)sulfonyl]imide with 1,12-di(3-vinylimidazolium)dodecane dibis[(trifluoromethyl)sulfonyl]imide incorporated cross-linker supported on an elastic nitinol wire, exhibited superior performance to DVB/CAR/PDMS regarding the average number of extracted peaks and extracted more polar analytes providing additional insight into the aroma profile of 'BRS Magna' wines. Four batches of wine were evaluated, namely 'Isabella' and 'BRS Magna' vintages 2015 and 2016, using highly selective PIL-based SPME coatings and enabled the detection of 350+ peaks. Furthermore, this is the first report evaluating the aroma of 'BRS Magna' wines. A hybrid approach that combined pixel-based Fisher ratio and peak table-based data comparison was used for data handling. This proof-of-concept experiment provided reliable and statistically valid distinction of wines that may guide regulation agencies to create high sample throughput protocols to screen wines exported by Brazilian vintners. Graphical abstract Highly selective extraction of wine aroma using polymeric ionic liquid.

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“…The aforementioned unique properties allow ionic liquids to be widely applied in various analytical applications including gas chromatography [2][3][4], high-performance liquid chromatography [5], solvent-based microextraction [6], sorption-based extractions [7,8], capillary electrophoresis [9,10], mass spectrometry [11], and electrochemical sensing systems [12].…”

Section: Introductionmentioning

confidence: 99%

Capillary column coated with geminal ionic liquids as stationary phases for gas chromatographic separation

Jiang¹,

Liu²,

Yang³

et al. 2017

Acta Chromatographica

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Summary. Four geminal ionic liquids (GILs), namely, 1,4-bis(1,1′-butyl-3,3′-methylene-imidazolium)-benzene bis[(trifluoromethyl)sulfonyl]imide (BBMIB-NTf2), 1,4-bis(1,1′-butyl-3,3′-methylene-imidazolium)-benzene tetrafluoroborate (BBMIB-BF4), 1,4-bis(1,1′-butyl-3,3′-methylene-imidazolium)-benzene hexafluophosphate (BBMIB-PF6), and 1,4-bis(1,1′-methyl-3,3′-methylene-imidazolium)-benzene bis[(trifluoromethyl) sulfonyl]imide (BMMIB-NTf2), were synthesized. They were statically coated onto the inner walls of fused-silica capillary columns and used as stationary phases for gas chromatography. The evaluation of BBMIB-NTf2, BBMIB-BF4, BBMIB-PF6, and BMMIB-NTf2 as stationary phases is reported here for the first time. These new stationary phases exhibit efficiencies of at least 2.3 × 10 3 plates per meter. Abraham solvation parameter model was used to evaluate the solvation characteristics. The system constants indicated that the dipolarity/polarizability and the hydrogen-bond basicity play a major role among five molecular interactions between stationary phases and solute molecules. A fundamental understanding into the solvation characteristics of these GILs can be used as a guide to choosing the appropriate geminal ionic liquids for specific applications in various fields. The chromatographic separation performance was evaluated by a Grob test mixture, n-alkanes, alcohols, and aromatic isomers. Furthermore, the thermal stability was tested. The present results demonstrate that these geminal ionic liquids stationary phases possess excellent chromatographic separation performance and good thermal stability (at least up to 270 °C) and may be applicable as gas chromatography stationary phases for more application.

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Identifying important structural features of ionic liquid stationary phases for the selective separation of nonpolar analytes by comprehensive two-dimensional gas chromatography

Cited by 32 publications

References 42 publications

Investigating the effect of ligand and cation on the properties of metal fluorinated acetylacetonate based magnetic ionic liquids

Investigating the effect of ligand and cation on the properties of metal fluorinated acetylacetonate based magnetic ionic liquids

Characterization of the aroma profile of novel Brazilian wines by solid-phase microextraction using polymeric ionic liquid sorbent coatings

Capillary column coated with geminal ionic liquids as stationary phases for gas chromatographic separation

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