Ultra-high thermal stability perarylated ionic liquids as gas chromatographic stationary phases for the selective separation of polyaromatic hydrocarbons and polychlorinated biphenyls

Odugbesi, Gabriel A.; He, Nan; Soltani, Mohammad; Davis, James H.; Anderson, Jared L.

doi:10.1016/j.chroma.2019.460466

Cited by 23 publications

(16 citation statements)

References 44 publications

(58 reference statements)

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“…IL interfaces are particularly important for interface-controlled applications such as sensor [4,[16][17][18][19], lubrication [20][21][22], separation [4,19,[23][24][25][26][27][28][29], electrochemistry [4,19,[30][31][32][33][34][35][36][37][38][39] and electronics [40][41][42] technologies. ILs further stimulated completely new concepts for catalysis [1,4,[43][44][45][46][47][48][49][50][51][52][53][54][55][56][57].…”

Section: Introductionmentioning

confidence: 99%

Ultrathin ionic liquid films on metal surfaces: adsorption, growth, stability and exchange phenomena

Lexow

Maier

Steinrück

2020

Advances in Physics: X

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The interface of ionic liquids (ILs) with solid surfaces is of pivotal interest for many applications, ranging from sensors, lubrication, separation technology, and electronics to electrochemistry and catalysis. We present a short review on ultrathin layers of ionic liquids on metal surfaces using a surface science approach. We mainly focus on specific examples of imidazolium-based ionic liquids on Ag(111) and Au(111) studied by angle-resolved X-ray photoelectron spectroscopy, and relate the obtained results to existing literature. We address a variety of phenomena on the molecular level, namely, (i) the adsorption, growth and wetting behavior of ILs, (ii) the thermal stability and desorption of ILs, (iii) exchange processes of anions and cations at the IL/solid interface, and (iv) the replacement of ILs from the IL/solid interface by porphyrins.

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Section: Introductionmentioning

confidence: 99%

Ultrathin ionic liquid films on metal surfaces: adsorption, growth, stability and exchange phenomena

Lexow

Maier

Steinrück

2020

Advances in Physics: X

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“…So far, the thermal stability of ILs has been studied by many techniques, such as UV (ultraviolet)-vis spectroscopy [36], flame ionization detection (FID) [37,38], and mass spectrometry (MS) [39][40][41]. Moreover, in some studies, ILs are heated isothermally in a furnace and open to air to simulate the real environment [42,43].…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability of Ionic Liquids: Current Status and Prospects for Future Development

Cheng

2021

Processes

102

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Ionic liquids (ILs) are the safest solvent in various high-temperature applications due to their non-flammable properties. In order to obtain their thermal stability properties, thermogravimetric analysis (TGA) is extensively used to analyze the kinetics of the thermal decomposition process. This review summarizes the different kinetics analysis methods and finds the isoconversional methods are superior to the Arrhenius methods in calculating the activation energy, and two tools—the compensation effect and master plots—are suggested for the calculation of the pre-exponential factor. With both parameters, the maximum operating temperature (MOT) can be calculated to predict the thermal stability in long-term runnings. The collection of thermal stability data of ILs with divergent cations and anions shows the structure of cations such as alkyl side chains, functional groups, and alkyl substituents will affect the thermal stability, but their influence is less than that of anions. To develop ILs with superior thermal stability, dicationic ILs (DILs) are recommended, and typically, [C4(MIM)2][NTf2]2 has a decomposition temperature as high as 468.1 °C. For the convenience of application, thermal stability on the decomposition temperature and thermal decomposition activation energy of 130 ILs are summarized at the end of this manuscript.

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“… 5 − 8 The large number of possible cations and anions with an enormous range of combinations allows for an excellent tunability of the properties of the ILs and enables tailoring them for specific applications. 9 , 10 Besides the fundamental interest in the interface properties of liquids, the gas/IL and IL/support interfaces are of specific importance for lubrication, 11 − 13 separation, 14 − 18 electrochemistry, 19 − 29 and catalysis 30 − 40 applications. In catalysis, ILs even stimulated the new concepts “supported ionic liquid phase” (SILP) 36 , 38 , 39 catalysis and “solid catalyst with ionic liquid layer” (SCILL).…”

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confidence: 99%

Atomic Force and Scanning Tunneling Microscopy of Ordered Ionic Liquid Wetting Layers from 110 K up to Room Temperature

et al. 2020

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Ionic liquids (ILs) are used as ultrathin films in many applications. We studied the nanoscale arrangement within the first layer of 1,3-dimethylimidazolium bis[(trifluoromethyl)sulfonyl]imide ([C 1 C 1 Im] [Tf 2 N]) on Au(111) between 400 and 110 K in ultrahigh vacuum by scanning tunneling and noncontact atomic force microscopy with molecular resolution. Compared to earlier studies on similar ILs, a different behavior is observed, which we attribute to the small size and symmetrical shape of the cation: (a) In both AFM and STM only the anions are imaged; (b) only long-range-ordered but no amorphous phases are observed; (c) the hexagonal room-temperature phase melts 30–50 K above the IL’s bulk melting point; (d) at 110 K, striped and hexagonal superstructures with two and three ion pairs per unit cell, respectively, are found. AFM turned out to be more stable at higher temperature, while STM revealed more details at low temperature.

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Ultra-high thermal stability perarylated ionic liquids as gas chromatographic stationary phases for the selective separation of polyaromatic hydrocarbons and polychlorinated biphenyls

Abstract: Ultra-high thermal stability perarylated ionic liquids as gas chromatographic stationary phases for the selective separation of polyaromatic hydrocarbons and polychlorinated biphenyls,

Cited by 23 publications

References 44 publications

Ultrathin ionic liquid films on metal surfaces: adsorption, growth, stability and exchange phenomena

Ultrathin ionic liquid films on metal surfaces: adsorption, growth, stability and exchange phenomena

Thermal Stability of Ionic Liquids: Current Status and Prospects for Future Development

Atomic Force and Scanning Tunneling Microscopy of Ordered Ionic Liquid Wetting Layers from 110 K up to Room Temperature

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