Synthesis of a novel melamine-formaldehyde resin-supported ionic liquid with Brønsted acid sites and its catalytic activities

Xing, Guiying

doi:10.1007/s00706-013-1022-7

Cited by 10 publications

(5 citation statements)

References 19 publications

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“…Polystyrene immobilized acidic ionic liquids are generally prepared by copolymerization of a mixture of a BAIL attached vinylbenzene and divinylbenzene as shown in Figure 18. 282 The polystyrene based systems are the most widely used organic supports, in addition poly(vinylpyridine) 216 and melamine resins 283 have also been used as solid supports for AILs. The recent examples of immobilization on organic supports are listed in Table 3.…”

Section: Immobilized On Organic Supportsmentioning

confidence: 99%

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Acidic Ionic Liquids

2016

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Ionic liquid with acidic properties is an important branch in the wide ionic liquid field and the aim of this article is to cover all aspects of these acidic ionic liquids, especially focusing on the developments in the last four years. The structural diversity and synthesis of acidic ionic liquids are discussed in the introduction sections of this review. In addition, an unambiguous classification system for various types of acidic ionic liquids is presented in the introduction. The physical properties including acidity, thermo-physical properties, ionic conductivity, spectroscopy, and computational studies on acidic ionic liquids are covered in the next sections. The final section provides a comprehensive review on applications of acidic ionic liquids in a wide array of fields including catalysis, CO2 fixation, ionogel, electrolyte, fuel-cell, membrane, biomass processing, biodiesel synthesis, desulfurization of gasoline/diesel, metal processing, and metal electrodeposition.

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Section: Immobilized On Organic Supportsmentioning

confidence: 99%

“…The polystyrene based systems are the most widely used organic supports, in addition poly(vinylpyridine) and melamine resins have also been used as solid supports for AILs. The recent examples of immobilization on organic supports are listed in Table .…”

Section: Immobilized Acidic Ionic Liquidsmentioning

confidence: 99%

Acidic Ionic Liquids

2016

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“…Supported dual acidic ILs were also obtained from polymers incorporating heterocyclic moieties, such as poly(4-vinylpyridine) [67,68] or a melamine resin [69]. The reaction of the heterocycles with 1,4-butanesultone led to a zwitterionic structure that was converted to the IL with sulphuric acid (Scheme 16).…”

Section: Preparation and Characterization Of Supported Acidic Ionimentioning

confidence: 99%

“…The reaction of the heterocycles with 1,4-butanesultone led to a zwitterionic structure that was converted to the IL with sulphuric acid (Scheme 16). The SILP materials were found to be stable below 200 °C [68] and 300 °C [69], respectively.…”

Section: Preparation and Characterization Of Supported Acidic Ionimentioning

confidence: 99%

“…Aliphatic aldehydes were transformed to the corresponding acetals smoothly with good to excellent yields (69%–99%) in 2–4 h in the presence of a sulfonated melamine-formaldehyde resin [69]. Ketones, such as cyclohexanone or 2-butanone, gave also good results, though the reactivity of the latter was found to be lower due to a steric hindrance.…”

Section: Catalytic Reactions In the Presence Of Acidic Silpsmentioning

confidence: 99%

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The Use of Supported Acidic Ionic Liquids in Organic Synthesis

Skoda‐Földes

2014

Molecules

117

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Abstract:Catalysts obtained by the immobilisation of acidic ionic liquids (ILs) on solid supports offer several advantages compared to the use of catalytically active ILs themselves. Immobilisation may result in an increase in the number of accessible active sites of the catalyst and a reduction of the amount of the IL required. The ionic liquid films on the carrier surfaces provide a homogeneous environment for catalytic reactions but the catalyst appears macroscopically as a dry solid, so it can simply be separated from the reaction mixture. As another advantage, it can easily be applied in a continuous fixed bed reactor. In the present review the main synthetic strategies towards the preparation of supported Lewis acidic and Brønsted acidic ILs are summarised. The most important characterisation methods and structural features of the supported ionic liquids are presented. Their efficiency in catalytic reactions is discussed with special emphasis on their recyclability.

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