Immobilized chiral tropine ionic liquid on silica gel as adsorbent for separation of metal ions and racemic amino acids

Qian, Guofei; Song, Hang; Yao, Shun

doi:10.1016/j.chroma.2015.11.083

Cited by 28 publications

(8 citation statements)

References 16 publications

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“…For that purpose, new ILs functionalized b-CDs were bonded to silica gel. Recently, the research on the immobilized chiral ionic liquids on a HPLC column has been described by Qian et al 32 In this work, tropine-type CILs with a proline anion were immobilized on silica gel. The chiral ionic liquid-modied silica gel saturated by Cu(II) was used in the resolution of racemic amino acids.…”

Section: Introductionmentioning

confidence: 99%

Renewable sources from plants as the starting material for designing new terpene chiral ionic liquids used for the chromatographic separation of acidic enantiomers

Feder‐Kubis

Flieger

Tatarczak-Michalewska

et al. 2017

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Renewable sources from plants as the starting material for designing new terpene chiral ionic liquids used for the chromatographic separation of acidic enantiomers

Feder‐Kubis

Flieger

Tatarczak-Michalewska

et al. 2017

RSC Adv.

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“…There are only several research papers dealing with the use of CILs as the modifiers of the supporting materials. Marwani et al [172] In 2016 Yao et al [173] described the chemical bonding method for immobilization of the chiral tropine IL with (S)-proline anion on the surface of silica gel. The procedure of silica gel modification is presented in Figure 11.…”

Section: Cils As Stationary Phases Surface Modifiersmentioning

confidence: 99%

Chiral Ionic Liquids: Structural Diversity, Properties and Applications in Selected Separation Techniques

Flieger

Feder‐Kubis

Tatarczak-Michalewska

2020

IJMS

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Ionic liquids (ILs) are chemical compounds composed of ions with melting points below 100 °C exhibiting a design feature. ILs are commonly used as the so-called green solvents, reagents or highly efficient catalysts in varied chemical processes. The huge application potential of ionic liquids (IL) justifies the growing interest in these compounds. In the last decade, increasing attention has been devoted to the development of new methods in the synthesis of stable chiral ionic liquids (CILs) and their application in various separation techniques. The beginnings of the successful use of CILs to separate enantiomers date back to the 1990 s. Most chiral ILs are based on chiral cations or chiral anions. There is also a limited number of CILs possessing both a chiral cation and a chiral anion. Due to the high molecular diversity of both ions, of which at least one has a chiral center, we have the possibility to design a large variety of optically active structures, thus expanding the range of CIL applications. Research utilizing chiral ionic liquids only recently has become more popular. However, it is the area that still has great potential for future development. This review aimed to describe the diversity of structures, properties and examples of applications of chiral ionic liquids as new chiral solid materials and chiral components of the anisotropic environment, providing chiral recognition of enantiomeric analytes, which is useful in liquid chromatography, countercurrent chromatography and other various CIL-based extraction techniques including aqueous biphasic (ABS) extraction systems, solid–liquid two-phase systems, liquid–liquid extraction systems with hydrophilic CILs, liquid–liquid extraction systems with hydrophobic CILs, solid-phase extraction and induced-precipitation techniques developed in the recent years. The growing demand for pure enantiomers in the pharmaceutical and food industries sparks further development in the field of extraction and separation systems modified with CILs highlighting them as affordable and environmentally friendly both chiral selectors and solvents.

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“…In the irst step, they activated the surface of the silica gel, mixed the tropine 3-iodopropyl trimethoxysilane and potassium iodide in ethanol, and then mixed all the reagents and left the reaction to perform at 110°C. The compound which resulted was added to a mixture of l-proline and sodium hydroxide solution and stirred continuously for h [52].…”

Section: Methods Used For the Immobilization Of Ils On Solid Supportsmentioning

confidence: 99%

Use of Ionic Liquids in Solid-Liquid Separation Processes

Lupa¹,

Negrea²,

Popa³

2017

Progress and Developments in Ionic Liquids

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This chapter reports the possible use of ionic liquids (ILs) in solid-liquid separation processes by their immobilization in suitable solid supports. This method presents some beneits such as economical one-due to the fact that a smaller quantity of ILs is used and the loss of ILs in the aqueous phase is avoided and second the eiciency beneitbecause the advantages of the ILs are combined with the properties of the solid support, and this enhances the removal process of metal ions from aqueous solutions and could be successfully used in the removal processes of metal ions from aqueous solutions containing trace amounts. The type of solid supports used for the immobilization of diferent ILs, and the methods used for the immobilization were discussed. "lso the adsorption eiciency of these ionic liquid immobilized solid supports in the removal process of diferent metal ions (Cr, Hg, Pt, "u, Pd, Cs, Sr, Tl, etc.) from aqueous solutions were presented. The inorganic materials present a higher eiciency to be used as solid supports for the immobilization of the ILs. It was observed that the physical method of impregnation, especially ultrasonication, has a positive efect on the adsorption capacities of the materials obtained.

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Immobilized chiral tropine ionic liquid on silica gel as adsorbent for separation of metal ions and racemic amino acids

Cited by 28 publications

References 16 publications

Renewable sources from plants as the starting material for designing new terpene chiral ionic liquids used for the chromatographic separation of acidic enantiomers

Renewable sources from plants as the starting material for designing new terpene chiral ionic liquids used for the chromatographic separation of acidic enantiomers

Chiral Ionic Liquids: Structural Diversity, Properties and Applications in Selected Separation Techniques

Use of Ionic Liquids in Solid-Liquid Separation Processes

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