The Use of Supported Acidic Ionic Liquids in Organic Synthesis

Skoda‐Földes, Rita

doi:10.3390/molecules19078840

Cited by 116 publications

(59 citation statements)

References 79 publications

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“…18 Images in Figure 9 showed non-homogeneous aggregates of micrometric size uniformly distributed on a particle of SiO 2 . BET analysis determined a surface area of 71.23 m 2 /g and a pore size of 8.74 nm.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of 1-Methyl-3-Methoxysilyl Propyl Imidazolium Chloride – Mesoporous Silica Composite as Adsorbent for Dehydration in Industrial Processes

Liévano

Díaz

2016

Mat. Res.

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Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of 1-Methyl-3-Methoxysilyl Propyl Imidazolium Chloride – Mesoporous Silica Composite as Adsorbent for Dehydration in Industrial Processes

Liévano

Díaz

2016

Mat. Res.

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“…[3][4][5][6] Since proton transfer is a common chemical transformation, Brønsted acidic ILs receive research attention especially for acid catalysts, fuel cells, biomass processing, polymerization, CO 2 fixation, etc. 6,[14][15][16][17][18][19] The design of stronger Brønsted acidic ILs and evaluation of the acidity in ILs are important for exploring their possible applications as media for acid-base reactions.…”

mentioning

confidence: 99%

A Hydronium Solvate Ionic Liquid: Facile Synthesis of Air-Stable Ionic Liquid with Strong Brønsted Acidity

Kitada

Takeoka

Kintsu

et al. 2018

J. Electrochem. Soc.

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A new kind of ionic liquid (IL) with strong Brønsted acidity, i.e., a hydronium (H 3 O + ) solvate ionic liquid, is reported. The IL can be described as [H 3 When two or more kinds of substances are mixed, the properties of the mixture can differ from those of the pure substances. Depending on the interactions between the components, some components undergo ionization, e.g. dissociation, protonation, solvation and complexation, due to the neutralization of Brønsted or Lewis acids and bases. Sometimes, the acid-base mixtures can be categorized as ionic liquids (ILs) with melting points below 100• C, which consist only of cations and anions. ILs are regarded as "the third liquid" and some ILs have fascinating physicochemical properties, such as low volatility, low flammability, high chemical, and thermal stability. Furthermore, ILs have received growing interest due to their various uses as media in chemical, biochemical, and/or electrochemical systems. [1][2][3][4][5][6] Common anions of ILs such as BF 4 -, PF 6 -, and AlCl 4 -are produced by neutralization, i.e. the adducts of a Lewis acid (BF 3 , PF 5 , or AlCl 3 ) and a Lewis base (F -or Cl -). Examples of ILs prepared through neutralization include solvate ILs.7-13 Solvate ILs often consist of equimolar molten mixtures of polyethers (linear or cyclic ones, i.e. glymes or crown ethers) and certain metal salts, where the Lewis acidic metal cations are solvated by equimolar amounts of Lewis basic glymes to give complex cations. Besides, neutralization of Brønsted acids and bases produces so-called protic ILs, which are preferred as acid-catalyzed reaction media due to the presence of an acidic proton.3-6 Since proton transfer is a common chemical transformation, Brønsted acidic ILs receive research attention especially for acid catalysts, fuel cells, biomass processing, polymerization, CO 2 fixation, etc.6,14-19 The design of stronger Brønsted acidic ILs and evaluation of the acidity in ILs are important for exploring their possible applications as media for acid-base reactions.Although 21-24 However, there is an exception. In solid, anhydrous HTf 2 N, the proton is bonded to the anion nitrogen and two oxygens of a neighboring HTf 2 N molecule. 25 Likewise, in the case of monohydrate, the imide superacid HTf 2 N remains associated and does not protonate water, as suggested experimentally and theoretically. In the infrared measurements for an H 2 O and HTf 2 N mixture in CCl 4 , strong Fermi resonance for N-H vibrations serves as evidence that HTf 2 N remains * Electrochemical Society Member.z E-mail: kitada.atsushi.3r@kyoto-u.ac.jp intact, and from the ab initio calculations, spontaneous proton dissociation was not observed for the Fig. 1a

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“…In this context, ionic liquids (IL) which were added to the principles of "Green Chemistry" have recently been increasingly employed because of their advantages such as their alternative solvent and catalytic ability, the similarity with organic compounds and metal-organic catalysts, and easy separation ability from the reaction product. So they were investigated individually ( [23,27,28,31]. The articles of recent years confirm that ionic liquids make a great interest in various petrochemical and alkylation processes [20,29,36].…”

Section: Introductionmentioning

confidence: 99%

The alkylation of oil fractions rich in aromatic hydrocarbons with C6, C8 and C10 α - olefins in the presence of ionic liquids catalytic systems

et al. 2020

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The article is dedicated to the development of processes for (oligo)alkylation of petroleum fractions rich in aromatic hydrocarbons, with α-olefins (hexene-1, octene-1, decene-1) in the presence of ionic-liquid catalytic systems and the study of the properties of the products obtained. Alkylation reactions were carried out in the presence of chloroaluminate ionic liquids; for the first time a (nano)metal-polymer composite (NMPC) was used in the catalytic system as a modifier, and zinc chloride (ZnCl2) was used in the catalytic system as a component and the results were compared. It has been shown that these ionic liquid catalytic systems (ILCS) are suitable for (oligo)alkylation reactions and the use of these additives in their composition will lead to efficient alkylation. The products obtained were analyzed by IR-, NMR- spectroscopy, fluorescent indicator adsorption methods, and size exclusion chromatography. It was shown that these petroleum fractions rich in aromatic hydrocarbons can be used as alkylation components, and depending on the composition of the ILCS, it is possible to regulate the molecular, thermophysical and other characteristics of the products obtained based on them. The alkylated products obtained have been tested as plasticizing additives in polyolefin composites.

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The Use of Supported Acidic Ionic Liquids in Organic Synthesis

Cited by 116 publications

References 79 publications

Synthesis and Characterization of 1-Methyl-3-Methoxysilyl Propyl Imidazolium Chloride – Mesoporous Silica Composite as Adsorbent for Dehydration in Industrial Processes

Synthesis and Characterization of 1-Methyl-3-Methoxysilyl Propyl Imidazolium Chloride – Mesoporous Silica Composite as Adsorbent for Dehydration in Industrial Processes

A Hydronium Solvate Ionic Liquid: Facile Synthesis of Air-Stable Ionic Liquid with Strong Brønsted Acidity

The alkylation of oil fractions rich in aromatic hydrocarbons with C6, C8 and C10 α - olefins in the presence of ionic liquids catalytic systems

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