1
|
Ba M, Chen R, Huang Q, Song Y, Li W, Zhang Y, Liu H, Xu X, Zhang W, Cai Z, Sun T. High-Resolution Performance of Polycaprolactone Functionalized with Guanidinium Ionic Liquid for Gas Chromatography. Chem Biodivers 2023; 20:e202300350. [PMID: 37377049 DOI: 10.1002/cbdv.202300350] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 06/29/2023]
Abstract
This work firstly reported a new polycaprolactone based material functionalized with guanidinium ionic liquid (PCL-GIL) as the stationary phase with high resolution performance for capillary gas chromatography (GC). It is composed of polycaprolactone (PCL) and guanidinium ionic liquid (GIL) with amphiphilic conformation. The PCL-GIL capillary column coated by static method exhibited high column efficiency of 3942 plates/m and moderate polarity. As a result, the PCL-GIL column exhibited high-resolution capability. For a mixture of 27 analytes with a wide ranging polarity and outperformed the PCL-2OH and HP-35 columns, showing its advantageous separation capability for analytes of diverse types. Moreover, the PCL-GIL column showed high resolving capability for various positional isomers and cis-/trans-isomers, including alkylbenzenes, chlorobenzenes, naphthalenes, bromonitrobenzenes, chloronitrobenzenes, benzaldehydes, phenols, alcohols, respectively. In a word, PCL derivatized by GIL units as a new type of stationary phase has a promising future in GC separations.
Collapse
Affiliation(s)
- Mengyi Ba
- Liaoning Province Professional and Technical Innovation Center for Fine Chemical Engineering of Aromatics Downstream, School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, 111003, P. R. China
| | - Ruonan Chen
- Liaoning Province Professional and Technical Innovation Center for Fine Chemical Engineering of Aromatics Downstream, School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, 111003, P. R. China
| | - Qiuchen Huang
- Liaoning Province Professional and Technical Innovation Center for Fine Chemical Engineering of Aromatics Downstream, School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, 111003, P. R. China
| | - Yanli Song
- Liaoning Province Professional and Technical Innovation Center for Fine Chemical Engineering of Aromatics Downstream, School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, 111003, P. R. China
| | - Wen Li
- Liaoning Province Professional and Technical Innovation Center for Fine Chemical Engineering of Aromatics Downstream, School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, 111003, P. R. China
| | - Yuanyuan Zhang
- Liaoning Province Professional and Technical Innovation Center for Fine Chemical Engineering of Aromatics Downstream, School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, 111003, P. R. China
| | - Haixin Liu
- Liaoning Province Professional and Technical Innovation Center for Fine Chemical Engineering of Aromatics Downstream, School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, 111003, P. R. China
| | - Xiang Xu
- Liaoning Province Professional and Technical Innovation Center for Fine Chemical Engineering of Aromatics Downstream, School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, 111003, P. R. China
| | - Weidong Zhang
- Liaoning Province Professional and Technical Innovation Center for Fine Chemical Engineering of Aromatics Downstream, School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, 111003, P. R. China
| | - Zhiqiang Cai
- Liaoning Province Professional and Technical Innovation Center for Fine Chemical Engineering of Aromatics Downstream, School of Petrochemical Engineering, Shenyang University of Technology, Liaoyang, 111003, P. R. China
| | - Tao Sun
- College of Chemistry and Chemical Engineering, Henan Key Laboratory of Function-Oriented Porous Materials, Luoyang Normal University, Luoyang, 471934, P. R. China
- Hebei Key Laboratory of Heterocyclic Compounds, Handan University, Handan, China
| |
Collapse
|
2
|
Dicationic ionic liquids based on bis(4-oligoethyleneoxyphenyl) viologen bistriflimide salts exhibiting high ionic conductivities. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
3
|
Soltanabadi A. Molecular simulations of thermodynamic properties of trigeminal tri-cationic ionic liquids: number of rings and anion type effects. Struct Chem 2022. [DOI: 10.1007/s11224-022-02044-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
4
|
López FI, Ibarra-Sanchez L, Domínguez-Esquivel JM, Miranda-Olvera AD, Bravo RH, Lagunas-Rivera S, Vázquez MA. Experimental and theoretical study on the synthesis and thermophysical properties of newer tricationic ionic liquids. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
5
|
Zhao X, Zhang S, Huang Q, Peng C, Feng Y, Xing J. Regulation of hydrogen bond acidity and its effect on separation performances. J Chromatogr A 2021; 1657:462556. [PMID: 34601256 DOI: 10.1016/j.chroma.2021.462556] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 09/09/2021] [Accepted: 09/09/2021] [Indexed: 11/18/2022]
Abstract
Ionic liquid bonded polysiloxanes (PILs) are a class of polysiloxanes whose side chains contain ionic liquid (IL) moieties. They not only inherit the character of "dual nature" from ILs but also inherit the excellent film-forming ability and thermal stability from polysiloxanes. In this paper, the solvation parameter model is introduced to investigate the interaction characteristics of PILs. The experimental results show that the b values of PILs occur in a wider range than those previously reported for the stationary phases. The hydrogen bond acidity can be effectively adjusted by varying the ionic liquid content or substituents. Hindering the formation of the hydrogen-bonded networks and increasing the exposed hydrogens may be intrinsic to the strong hydrogen bond acidity of PILs. Subsequently, the separation performances of these PIL stationary phases were demonstrated by separating various mixed samples of aromatic isomers, dichloroanilines, substituted alkanes, alcohols, esters, etc. The results show that the PILs with strong hydrogen bond acidity have excellent selectivity performances for aromatic position isomers, alcohols, and substituted alkanes. This study is significant for understanding the hydrogen bond acidity and broadening the range of hydrogen bond acidity of ionic liquid stationary phases.
Collapse
Affiliation(s)
- Xiaojie Zhao
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China; School of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China
| | - Shaowen Zhang
- School of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China
| | - Qing Huang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China
| | - Chuanyun Peng
- School of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China
| | - Yong Feng
- School of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China
| | - Jun Xing
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, Hubei 430072, China.
| |
Collapse
|
6
|
Bhowmik PK, Koh JJ, King D, Han H, Heinrich B, Donnio B, Zaton D, Martinez-Felipe A. Dicationic stilbazolium salts: Structural, thermal, optical, and ionic conduction properties. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
7
|
Ikeda T. Facile Synthesis of Tetra-Branched Tetraimidazolium and Tetrapyrrolidinium Ionic Liquids. ACS OMEGA 2021; 6:19623-19628. [PMID: 34368549 PMCID: PMC8340402 DOI: 10.1021/acsomega.1c02187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 07/09/2021] [Indexed: 05/04/2023]
Abstract
A facile synthetic route for tetra-branched tetraimidazolium and tetrapyrrolidinium ionic liquids was developed. In contrast to the previous synthetic scheme, the new synthetic route requires only three reaction steps instead of seven. The total yield of tetracation was also improved from 17-21 to 39-41%. Using the new synthetic scheme, four kinds of tetracations were synthesized from the combination of two cationic units (imidazolium and pyrrolidinium) and two counteranions [bis(fluorosulfonyl)imide (FSI) and bis(trifluoromethanesulfonyl)imide (TFSI)]. Basic physical properties including glass transition temperature, thermal decomposition temperature, density, viscosity, and ionic conductivity were determined. The counterion exchange from TFSI to FSI resulted in lower glass transition temperature and higher ionic conductivity. Tetrapyrrolidinium exhibited higher viscosity and lower ionic conductivity than tetraimidazolium. The counterion exchange from TFSI to FSI resulted in lower viscosity in the case of tetraimidazolium, while the opposite result was obtained in the case of tetrapyrrolidinium. Tetracations composed of ethyl imidazolium units, diethylene glycol spacers, and FSI counterions exhibited the highest ionic conductivity of 3.5 × 10-4 S cm-1 at 25 °C under anhydrous conditions. This is the best ionic conductivity in the tetracations ever reported.
Collapse
|
8
|
Hafizi A, Rajabzadeh M, Mokari M, Khalifeh R. Synthesis, property analysis and absorption efficiency of newly prepared tricationic ionic liquids for CO2 capture. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115108] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
9
|
Ikeda T. Tetra-Branched Tetra-Cationic Ionic Liquids: Effects of Spacer and Tail Structure on Physical Properties. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Taichi Ikeda
- Research Center for Functional Materials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| |
Collapse
|
10
|
Efficiency of capillary GC columns based on phosphonium ionic liquids. J Chromatogr A 2020; 1622:461127. [PMID: 32331778 DOI: 10.1016/j.chroma.2020.461127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/09/2020] [Accepted: 04/12/2020] [Indexed: 11/24/2022]
Abstract
Gas chromatographic columns based on ionic liquids (ILs) are very promising since the selectivity of these columns can be tuned by both the cation and the anion chemical nature. In this paper, efficiencies of capillary columns based on four phosphonium ionic liquids were studied. The performance of seven columns containing the cation trihexyl(tetradecyl)phosphonium and the anions bromide, chloride, and bis(trifluoromethylsulfonyl)imide was evaluated by measuring the solute band broadening as a function of gas velocities at three temperatures. Hence, classical height equivalent to a theoretical plate (H) against gas velocity (u) plots corresponding to those columns were generated and the data were fitted to the Golay-Guiochon equation with the aim of seeking the optimum conditions to be operated each of them. Band broadening at practical gas velocities is mainly due to poor mass transfer properties of solutes in the (viscous) liquid phases, which limits the achieved efficiencies. These H/u plots proved to be necessary to characterize the column quality at a given temperature, to interpret the band broadening phenomena and thus, to establish the lower temperature limits and the expected plate counts at that temperature.
Collapse
|
11
|
Kanao E, Kubo T, Otsuka K. Carbon-Based Nanomaterials for Separation Media. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20190372] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Eisuke Kanao
- Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takuya Kubo
- Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Koji Otsuka
- Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| |
Collapse
|
12
|
Khazalpour S, Yarie M, Kianpour E, Amani A, Asadabadi S, Seyf JY, Rezaeivala M, Azizian S, Zolfigol MA. Applications of phosphonium-based ionic liquids in chemical processes. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2020. [DOI: 10.1007/s13738-020-01901-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
13
|
Soltanabadi A, Bahrami M. Gas-phase electronic properties of tri-cationic imidazolium-based ionic liquids in comparison with mono- and di-cationic ionic liquids. J Mol Graph Model 2020; 96:107529. [PMID: 31918318 DOI: 10.1016/j.jmgm.2019.107529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 12/28/2019] [Accepted: 12/28/2019] [Indexed: 10/25/2022]
Abstract
The optimized geometries, electronic structures, and gas-phase properties of widely applicable non-linear trigeminal tri-cationic ILs (TT-X3) were investigated using density functional theory (DFT) calculations and compared with mono- (M-X) and di-cationic (D-X2) ionic liquids. The studied ILs are based on the imidazolium cation containing halide (X‾) anions, where X‾ = Cl‾, Br‾ and I‾. Inter-molecular hydrogen bonds were studied by atoms in molecules (AIM) and natural bond orbital (NBO) analyses. Accordingly the most significant cation-anion charge transfer is related to C1-H1 … X (X = Cl, Br, I) interaction which strongly occurs in TT-X3 ILs and especially in TT-Cl3. Among ILs under investigation, TT-Cl3 has the strongest cation-anion interaction. Also M - I IL has the largest and D-Cl2 has the smallest electrical dipole moment.
Collapse
Affiliation(s)
- Azim Soltanabadi
- Department of Physical Chemistry, Faculty of Chemistry, Razi University, Kermanshahm, Iran.
| | - Maryam Bahrami
- Department of Chemistry, Shiraz University, Shiraz, 71946, Iran.
| |
Collapse
|
14
|
Affiliation(s)
- Taichi Ikeda
- Research Center for Functional Materials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044
| | - Yoshitaka Matsushita
- Research Network and Facility Division, NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044
| |
Collapse
|
15
|
Wang J, Ma J, Zellers ET. Room-temperature-ionic-liquid coated graphitized carbons for selective preconcentration of polar vapors. J Chromatogr A 2020; 1609:460486. [PMID: 31506165 DOI: 10.1016/j.chroma.2019.460486] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 08/22/2019] [Accepted: 08/26/2019] [Indexed: 11/26/2022]
Abstract
Most adsorbent materials used for preconcentrating and thermally desorbing volatile and semi-volatile organic compounds (S/VOCs) in portable or "micro" gas chromatographic (GC/µGC) instruments preferentially capture non-polar or moderately polar compounds relative to more polar compounds. Here, we explore the use of a known trigonal-tripyramidal room-temperature ionic liquid (RTIL) as a surface modifier for the graphitized carbons, Carbopack B (C-B) and Carbopack X (C-X), with the goal of enhancing their capacity and selectivity for polar S/VOCs. Breakthrough tests were performed by challenging tubes packed with ∼2.5 mg of C-B or RTIL-coated C-B (RTIL/C-B) with 13 individual S/VOCs, including several organophosphorus compounds and reference alkyl and aromatic hydrocarbons of comparable vapor pressures, at concentrations ranging from 14 to 130 mg/m3. The 10% breakthrough volume, Vb10, was used as the measure of capacity. For the RTIL/C-B, the Vb10 values of the five organophosphorus vapors tested were consistently ∼2.5 times larger than those for the untreated C-B, and Vb10 values of the four non-polar reference vapors were 11-26 times smaller for the RTIL/C-B than for the untreated C-B. For compounds of similar vapor pressure the capacity ratios for polar vs. non-polar compounds with the RTIL/C-B ranged from 1.8 to 34. Similar results were obtained with C-X and RTIL/C-X on a smaller set of compounds. Tests at 70% relative humidity or with a binary mixture of a polar and non-polar compound had no effect on the capacity of the RTIL/C-B, and there were no changes in Vb10 values after several months of testing that included cycling from 25 to 250 °C. Capacity was strongly correlated with vapor pressure. Attempts to reconcile the selectivity using models based on linear-solvation-energy relationships were only partially successful. Nonetheless, these results indicate that RTIL coating of carbon adsorbents affords a simple, reliable means of rendering them selective for polar S/VOCs.
Collapse
Affiliation(s)
- Junqi Wang
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, United States; Center for Wireless Integrated MicroSensing & Systems, University of Michigan, Ann Arbor, MI 48109-2122, United States
| | - Jialiu Ma
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, United States
| | - Edward T Zellers
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, United States; Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI 48109-2029, United States; Center for Wireless Integrated MicroSensing & Systems, University of Michigan, Ann Arbor, MI 48109-2122, United States.
| |
Collapse
|
16
|
A monolithic capillary modified with a copoplymer prepared from the ionic liquid 1-vinyl-3-octylimidazolium bromide and styrene for electrochromatography of alkylbenzenes, polycyclic aromatic hydrocarbons, proteins and amino acids. Mikrochim Acta 2019; 187:67. [DOI: 10.1007/s00604-019-3894-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 10/06/2019] [Indexed: 02/08/2023]
|
17
|
Ionic liquids as gas chromatographic stationary phases: how can they change food and natural product analyses? Anal Bioanal Chem 2019; 412:17-25. [PMID: 31838558 DOI: 10.1007/s00216-019-02288-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/08/2019] [Accepted: 11/14/2019] [Indexed: 01/24/2023]
Abstract
The volatile fraction of natural products often consists of complex mixtures of isomeric and/or homologous components with similar structural and physical characteristics (e.g. mono- and sesquiterpenoids) that are not easy to separate simultaneously with conventional GC stationary phases, even when used with multidimensional systems. The introduction of ionic liquids (ILs) as stationary phases has opened up new perspectives in this field as their unique solvation properties result in uncommon selectivity, which is completely different to that of classic polydimethylsiloxane (PDMS)- and polyethyleneglycol (PEG)-based columns. Because of their peculiar selectivity and high inertness, IL-based columns have already found several applications in the natural product field in mono- and multidimensional GC and preparative GC, leading to the exhaustive analysis of complex samples (including aqueous solutions), and the separation of challenging pair(s) of compounds. This article provides an overview of how IL-based columns can be exploited in the fields of food and natural products, explores the wide range of applications that have already been developed and highlights the main features of these promising stationary phases, which are expected to be further extended in the near future, in particular, for routine use. Graphical abstract.
Collapse
|
18
|
Farooq MQ, Chand D, Odugbesi GA, Varona M, Mudryk Y, Anderson JL. Investigating the effect of ligand and cation on the properties of metal fluorinated acetylacetonate based magnetic ionic liquids. NEW J CHEM 2019. [DOI: 10.1039/c9nj02595b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The effect of chemical structure on various physiochemical properties including thermal stability, solvent miscibility, magnetic susceptibility and viscosity is studied for acetylacetone based magnetic ionic liquids.
Collapse
Affiliation(s)
| | - Deepak Chand
- Department of Chemistry
- Iowa State University
- Ames
- USA
| | | | | | - Yaroslav Mudryk
- Division of Materials Science and Engineering
- Ames Laboratory
- Iowa State University
- Ames
- USA
| | | |
Collapse
|
19
|
Mazzucotelli M, Bicchi C, Marengo A, Rubiolo P, Galli S, Anderson JL, Sgorbini B, Cagliero C. Ionic liquids as stationary phases for gas chromatography—Unusual selectivity of ionic liquids with a phosphonium cation and different anions in the flavor, fragrance and essential oil analyses. J Chromatogr A 2019; 1583:124-135. [DOI: 10.1016/j.chroma.2018.11.032] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 11/09/2018] [Accepted: 11/17/2018] [Indexed: 12/28/2022]
|
20
|
Shashkov MV, Sidelnikov VN. Orthogonality and Quality of GC × GC Separations for Complex Samples with Ionic Liquid Stationary Phases in First Dimension. Chromatographia 2018. [DOI: 10.1007/s10337-018-3672-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
21
|
A flexible and convenient strategy for synthesis of ionic liquid bonded polysiloxane stationary phases. J Chromatogr A 2018; 1587:197-208. [PMID: 30580961 DOI: 10.1016/j.chroma.2018.12.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 11/30/2018] [Accepted: 12/10/2018] [Indexed: 11/24/2022]
Abstract
Ionic liquid bonded polysiloxanes (PILs) are a class of polysiloxanes whose side chains contain ionic liquid (IL) moieties. Considering their excellent selectivity and thermo-stability, PILs have great potentials in the development of polar stationary phases for gas chromatography. In this paper, a novel synthesis strategy for PILs is proposed to diversify PIL stationary phases and also facilitate the study on relationships between stationary phase structure and separation performances. The polysiloxane with imidazole groups at the side chains was synthesized firstly, and then these imidazole groups further reacted with halogenated compounds to produce various IL groups. Upon this, fifteen PIL stationary phases differing in IL content, IL group or combination of different IL groups have been synthesized and used to prepare capillary columns through static coating method. These columns have quite different general polarity indexes (the average value of all Rohrschneider-McReynolds constants in this paper) falling in a broad range from 218 to 717, and most columns have column efficiency values over 3000 plates/m. In addition, IL content, structure of the IL and combination of different IL groups have noticeable influences on interaction features of the stationary phases. After that, the separation performances of these PIL stationary phases were demonstrated by separating various mixed samples of aliphatic esters, dichloro-anilines, alcohols, aromatic amines, substituted alkanes, and so on. In order to reveal the relationship of interaction characteristics and separation performances, a set of indexes of contribution rates (CRs) is proposed. Based on CRs, the separation selectivity of the PIL stationary phases has been discussed in detail. The results indicate that there are significant differences in the separation selectivity not only between PILs and conventional polar stationary phases, but also among different PILs. All of these imply a family of practical PILs with special selectivity could be constructed upon this synthesis strategy.
Collapse
|
22
|
Gogoi P, Boruah K, Borah R. Synthesis of Triethylamine-Bridged Basic Tricationic Ionic Liquids and Evaluation of Their Catalytic Efficiencies for Preparation of Arylidene or Alkylidenemalononitrile. ChemistrySelect 2018. [DOI: 10.1002/slct.201801719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Pinky Gogoi
- Department of Chemical Sciences; Tezpur University; Napaam-784028, Assam, Tezpur India
| | - Kabita Boruah
- Department of Chemical Sciences; Tezpur University; Napaam-784028, Assam, Tezpur India
| | - Ruli Borah
- Department of Chemical Sciences; Tezpur University; Napaam-784028, Assam, Tezpur India
| |
Collapse
|
23
|
Benzene centered tripodal imidazolium (BTI) system: Emerged towards multidisciplinary research and development. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.03.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
24
|
Halimehjani AZ, Barati V. Synthesis of Novel Tetracationic Ammonium Salts and Their Applications as Catalyst for the Synthesis of Xanthenes, Benzoxanthenes and Bis(indolyl)methanes in Water. ChemistrySelect 2018. [DOI: 10.1002/slct.201800060] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Vahid Barati
- Faculty of Chemistry; Kharazmi University; 49 Mofateh St. Tehran Iran
| |
Collapse
|
25
|
He S, He Y, Cheng L, Wu Y, Ke Y. Novel chiral ionic liquids stationary phases for the enantiomer separation of chiral acid by high-performance liquid chromatography. Chirality 2018; 30:670-679. [PMID: 29476561 DOI: 10.1002/chir.22839] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 12/08/2017] [Accepted: 01/05/2018] [Indexed: 11/06/2022]
Abstract
Novel chiral ionic liquid stationary phases based on chiral imidazolium were prepared. The ionic liquid chiral selector was synthesized by ring opening of cyclohexene oxide with imidazole or 5,6-dimethylbenzimidazole, and then chemically modified by different substitute groups. Chiral stationary phases were prepared by bonding to the surface of silica sphere through thioene "click" reaction. Their enantioselective separations of chiral acids were evaluated by high-performance liquid chromatography. The retention of acid sample was related to the counterion concentration and showed a typical ion exchange process. The chiral separation abilities of chiral stationary phases were greatly influenced by the substituent group on the chiral selector as well as the mobile phase, which indicated that, besides ion exchange, other interactions such as steric hindrance, π-π interaction, and hydrogen bonding are important for the enantioselectivity. In this report, the influence of bulk solvent components, the effects of varying concentration, and the type of the counterion as well as the proportion of acid and basic additives were investigated in detail.
Collapse
Affiliation(s)
- Shanshan He
- Engineering Research Center of Pharmaceutical Process Chemistry, School of Pharmacy, Ministry of Education, East China University of Science and Technology, Shanghai, China
| | - Yunchao He
- Engineering Research Center of Pharmaceutical Process Chemistry, School of Pharmacy, Ministry of Education, East China University of Science and Technology, Shanghai, China
| | - Lingping Cheng
- Engineering Research Center of Pharmaceutical Process Chemistry, School of Pharmacy, Ministry of Education, East China University of Science and Technology, Shanghai, China
| | - Yaling Wu
- Engineering Research Center of Pharmaceutical Process Chemistry, School of Pharmacy, Ministry of Education, East China University of Science and Technology, Shanghai, China
| | - Yanxiong Ke
- Engineering Research Center of Pharmaceutical Process Chemistry, School of Pharmacy, Ministry of Education, East China University of Science and Technology, Shanghai, China
| |
Collapse
|
26
|
Sedghamiz E, Moosavi M. Probing the tricationic ionic liquid/vacuum interface: insights from molecular dynamics simulations. Phys Chem Chem Phys 2018; 20:14251-14263. [DOI: 10.1039/c8cp02471e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The surface properties of three symmetric linear tricationic ionic liquids (LTILs) with the common anion, bis(trifluoromethylsulfonyl)imide ([NTf2]−), were studied using atomistic molecular dynamics simulation and identification of the truly interfacial molecules (ITIM) analysis.
Collapse
Affiliation(s)
- Elaheh Sedghamiz
- Department of Chemistry
- University of Isfahan
- Isfahan 81746-73441
- Iran
| | - Majid Moosavi
- Department of Chemistry
- University of Isfahan
- Isfahan 81746-73441
- Iran
| |
Collapse
|
27
|
Lenca N, Poole CF. System map for the ionic liquid stationary phase tri(tripropylphosphoniumhexanamido)triethylamine bis(trifluoromethylsulfonyl)imide for gas chromatography. J Chromatogr A 2017; 1524:210-214. [DOI: 10.1016/j.chroma.2017.09.064] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 09/22/2017] [Accepted: 09/25/2017] [Indexed: 01/10/2023]
|
28
|
Wu D, Cai P, Zhao X, Kong Y, Pan Y. Recent progress of task-specific ionic liquids in chiral resolution and extraction of biological samples and metal ions. J Sep Sci 2017; 41:373-384. [DOI: 10.1002/jssc.201700848] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Revised: 08/25/2017] [Accepted: 08/26/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Datong Wu
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center; Changzhou University; Changzhou China
- Department of Chemistry; Zhejiang University; Hangzhou China
| | - Pengfei Cai
- Department of Chemistry; Zhejiang University; Hangzhou China
| | - Xiaoyong Zhao
- Department of Chemistry; Zhejiang University; Hangzhou China
| | - Yong Kong
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Center; Changzhou University; Changzhou China
| | - Yuanjiang Pan
- Department of Chemistry; Zhejiang University; Hangzhou China
| |
Collapse
|
29
|
Recent advances on ionic liquid uses in separation techniques. J Chromatogr A 2017; 1559:2-16. [PMID: 28958758 DOI: 10.1016/j.chroma.2017.09.044] [Citation(s) in RCA: 162] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 09/13/2017] [Accepted: 09/19/2017] [Indexed: 12/12/2022]
Abstract
The molten organic salts with melting point below 100°C, commonly called ionic liquids (ILs) have found numerous uses in separation sciences due to their exceptional properties as non molecular solvents, namely, a negligible vapor pressure, a high thermal stability, and unique solvating properties due to polarity and their ionic character of molten salts. Other properties, such as viscosity, boiling point, water solubility, and electrochemical window, are adjustable playing with which anion is associated with which cation. This review focuses on recent development of the uses of ILs in separation techniques actualizing our 2008 article (same authors, J. Chromatogr. A, 1184 (2008) 6-18) focusing on alkyl methylimidazolium salts. These developments include the use of ILs in nuclear waste reprocessing, highly thermally stable ILs that allowed for the introduction of polar gas chromatography capillary columns able to work at temperature never seen before (passing 300°C), the use of ILs in liquid chromatography and capillary electrophoresis, and the introduction of tailor-made ILs for mass spectrometry detection of trace anions at the few femtogram level. The recently introduced deep eutectic solvents are not exactly ILs, they are related enough so that their properties and uses in countercurrent chromatography are presented.
Collapse
|
30
|
Patil RA, Talebi M, Sidisky LM, Armstrong DW. Examination of Selectivities of Thermally Stable Geminal Dicationic Ionic Liquids by Structural Modification. Chromatographia 2017. [DOI: 10.1007/s10337-017-3372-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
31
|
Cagliero C, Bicchi C, Cordero C, Liberto E, Rubiolo P, Sgorbini B. Analysis of essential oils and fragrances with a new generation of highly inert gas chromatographic columns coated with ionic liquids. J Chromatogr A 2017; 1495:64-75. [DOI: 10.1016/j.chroma.2017.03.029] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 03/14/2017] [Accepted: 03/16/2017] [Indexed: 10/19/2022]
|
32
|
Sedghamiz E, Moosavi M. Tricationic Ionic Liquids: Structural and Dynamical Properties via Molecular Dynamics Simulations. J Phys Chem B 2017; 121:1877-1892. [DOI: 10.1021/acs.jpcb.6b10766] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Elaheh Sedghamiz
- Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| | - Majid Moosavi
- Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran
| |
Collapse
|
33
|
Watson NE, Bahaghighat HD, Cui K, Synovec RE. Comprehensive Three-Dimensional Gas Chromatography with Time-of-Flight Mass Spectrometry. Anal Chem 2017; 89:1793-1800. [DOI: 10.1021/acs.analchem.6b04112] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Nathanial E. Watson
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
- Department
of Chemistry and Life Science, United States Military Academy, West Point, New York 10996, United States
| | - H. Daniel Bahaghighat
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
- Department
of Chemistry and Life Science, United States Military Academy, West Point, New York 10996, United States
| | - Ke Cui
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
| | - Robert E. Synovec
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195, United States
| |
Collapse
|
34
|
Mao Z, Chen Z. Monolithic column modified with bifunctional ionic liquid and styrene stationary phases for capillary electrochromatography. J Chromatogr A 2017; 1480:99-105. [DOI: 10.1016/j.chroma.2016.12.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 12/12/2016] [Accepted: 12/12/2016] [Indexed: 12/22/2022]
|
35
|
Baelhadj AC, Mutelet F, Jiang B, Acree WE. Activity coefficients at infinite dilution for organic solutes dissolved in two 1,2,3-tris(diethylamino)cyclopenylium based room temperature ionic liquids. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.08.028] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
36
|
Ionic liquid coated carbon nanospheres as a new adsorbent for fast solid phase extraction of trace copper and lead from sea water, wastewater, street dust and spice samples. Talanta 2016; 159:222-230. [DOI: 10.1016/j.talanta.2016.06.022] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 06/04/2016] [Accepted: 06/10/2016] [Indexed: 12/20/2022]
|
37
|
Evaluation of poly(90% biscyanopropyl/10% cyanopropylphenyl siloxane) capillary columns for the gas chromatographic quantification of trans fatty acids in non-hydrogenated vegetable oils. J Chromatogr A 2016; 1460:160-72. [DOI: 10.1016/j.chroma.2016.07.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 06/01/2016] [Accepted: 07/07/2016] [Indexed: 11/22/2022]
|
38
|
The utilisation of two detectors for the determination of water in honey using headspace gas chromatography. Food Chem 2016; 205:23-7. [DOI: 10.1016/j.foodchem.2016.02.118] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 02/10/2016] [Accepted: 02/16/2016] [Indexed: 11/22/2022]
|
39
|
Bis(trifluoromethanesulfonyl)imide-based ionic liquids grafted on graphene oxide-coated solid-phase microextraction fiber for extraction and enrichment of polycyclic aromatic hydrocarbons in potatoes and phthalate esters in food-wrap. Talanta 2016; 153:392-400. [DOI: 10.1016/j.talanta.2016.03.034] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 03/03/2016] [Accepted: 03/12/2016] [Indexed: 11/22/2022]
|
40
|
Collin WR, Nuñovero N, Paul D, Kurabayashi K, Zellers ET. Comprehensive two-dimensional gas chromatographic separations with a temperature programmed microfabricated thermal modulator. J Chromatogr A 2016; 1444:114-22. [DOI: 10.1016/j.chroma.2016.03.072] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Revised: 03/23/2016] [Accepted: 03/23/2016] [Indexed: 01/25/2023]
|
41
|
Fan H, Smuts J, Bai L, Walsh P, Armstrong DW, Schug KA. Gas chromatography–vacuum ultraviolet spectroscopy for analysis of fatty acid methyl esters. Food Chem 2016; 194:265-71. [DOI: 10.1016/j.foodchem.2015.08.004] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 07/03/2015] [Accepted: 08/02/2015] [Indexed: 01/24/2023]
|
42
|
Ragonese C, Sciarrone D, Grasso E, Dugo P, Mondello L. Enhanced resolution of Mentha piperita
volatile fraction using a novel medium-polarity ionic liquid gas chromatography stationary phase. J Sep Sci 2015; 39:537-44. [DOI: 10.1002/jssc.201500247] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 11/11/2015] [Accepted: 11/18/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Carla Ragonese
- “Scienze chimiche, biologiche, farmaceutiche ed ambientali” Department; University of Messina; Messina Italy
| | - Danilo Sciarrone
- “Scienze chimiche, biologiche, farmaceutiche ed ambientali” Department; University of Messina; Messina Italy
| | - Elisa Grasso
- “Scienze chimiche, biologiche, farmaceutiche ed ambientali” Department; University of Messina; Messina Italy
| | - Paola Dugo
- “Scienze chimiche, biologiche, farmaceutiche ed ambientali” Department; University of Messina; Messina Italy
- University Campus Bio-Medico of Rome; Rome Italy
- Chromaleont s.r.l., c/o University of Messina, Polo Annunziata; viale Annunziata; 98168 - Messina Italy
| | - Luigi Mondello
- “Scienze chimiche, biologiche, farmaceutiche ed ambientali” Department; University of Messina; Messina Italy
- University Campus Bio-Medico of Rome; Rome Italy
- Chromaleont s.r.l., c/o University of Messina, Polo Annunziata; viale Annunziata; 98168 - Messina Italy
| |
Collapse
|
43
|
Rahman MM, Abd El‐Aty A, Choi J, Shin H, Shin SC, Shim J. Basic Overview on Gas Chromatography Columns. ANALYTICAL SEPARATION SCIENCE 2015:823-834. [DOI: 10.1002/9783527678129.assep024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Abstract
The main purpose of this chapter is to give a basic overview on the basic components of stationary phases/columns in gas chromatography (
GC
) for the benefit of students and beginners in the field of
GC
.
Collapse
|
44
|
Yang X, Wang J, Zou W, Wu J. Synthesis and thermodynamic properties of a novel pyridinium-based asymmetrical gemini ionic liquid. KOREAN J CHEM ENG 2015. [DOI: 10.1007/s11814-015-0222-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
45
|
Mendoza LG, González-Álvarez J, Gonzalo CF, Arias-Abrodo P, Altava B, Luis SV, Burguete MI, Gutiérrez-Álvarez MD. Gas chromatographic analysis of fatty acid methyl esters of milk fat by an ionic liquid derived from L-phenylalanine as the stationary phase. Talanta 2015; 143:212-218. [DOI: 10.1016/j.talanta.2015.05.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 05/12/2015] [Accepted: 05/15/2015] [Indexed: 10/23/2022]
|
46
|
Chaugule AA, Tamboli AH, Sheikh FA, Chung WJ, Kim H. Glycerol functionalized imidazolium tri-cationic room temperature ionic liquids: Synthesis, properties and catalytic performance for 2-azidoalcohol synthesis from epoxide. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.04.058] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
47
|
Wang J, Bai L, Wei Z, Qin J, Ma Y, Liu H. Incorporation of ionic liquid into porous polymer monoliths to enhance the separation of small molecules in reversed-phase high-performance liquid chromatography. J Sep Sci 2015; 38:2101-8. [DOI: 10.1002/jssc.201500061] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Revised: 04/02/2015] [Accepted: 04/02/2015] [Indexed: 12/26/2022]
Affiliation(s)
- Jiafei Wang
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; Hebei University; Baoding 071002 China
| | - Ligai Bai
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; Hebei University; Baoding 071002 China
| | - Zhen Wei
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; Hebei University; Baoding 071002 China
| | - Junxiao Qin
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; Hebei University; Baoding 071002 China
| | - Yamin Ma
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; Hebei University; Baoding 071002 China
| | - Haiyan Liu
- Key Laboratory of Pharmaceutical Quality Control of Hebei Province, College of Pharmaceutical Sciences, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education; Hebei University; Baoding 071002 China
| |
Collapse
|
48
|
Qiao L, Shi X, Lu X, Xu G. Preparation and evaluation of surface-bonded tricationic ionic liquid silica as stationary phases for high-performance liquid chromatography. J Chromatogr A 2015; 1396:62-71. [DOI: 10.1016/j.chroma.2015.03.081] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 03/30/2015] [Accepted: 03/30/2015] [Indexed: 10/23/2022]
|
49
|
Wang J, Wang M, Yang X, Zou W, Chen X. Crystal structure and thermal decomposition kinetics of 1-(pyridinium-1-yl)propane-(1-methylpiperidinium) bi[bis(trifluoromethanesulfonyl)imide], [PyC3Pi][NTf2]2. Chin J Chem Eng 2015. [DOI: 10.1016/j.cjche.2014.07.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
50
|
Collin WR, Bondy A, Paul D, Kurabayashi K, Zellers ET. μGC × μGC: Comprehensive Two-Dimensional Gas Chromatographic Separations with Microfabricated Components. Anal Chem 2015; 87:1630-7. [DOI: 10.1021/ac5032226] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- William R. Collin
- Department
of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
- Center for Wireless
Integrated MicroSensing and Systems, University of Michigan, Ann Arbor, Michigan 48109-2122, United States
| | - Amy Bondy
- Department
of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
| | - Dibyadeep Paul
- Department
of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2125, United States
- Center for Wireless
Integrated MicroSensing and Systems, University of Michigan, Ann Arbor, Michigan 48109-2122, United States
| | - Katsuo Kurabayashi
- Department
of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109-2125, United States
- Center for Wireless
Integrated MicroSensing and Systems, University of Michigan, Ann Arbor, Michigan 48109-2122, United States
| | - Edward T. Zellers
- Department
of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, United States
- Department
of Environmental Health Sciences, University of Michigan, Ann Arbor, Michigan 48109-2029, United States
- Center for Wireless
Integrated MicroSensing and Systems, University of Michigan, Ann Arbor, Michigan 48109-2122, United States
| |
Collapse
|