Surface-Active Ionic Liquids in Catalytic Water Splitting

We report the application of surface-active ionic liquids as ligands and optional reaction media in iridium-catalyzed water oxidations. Three novel catalysts with N,N-dialkylimidazolidin-2-ylidene ligands based on amphiphilic imidazolium ionic liquids were synthesized and characterized. Excellent turn-over frequencies of up to 0.92s−1 were obtained in catalytic water splitting, and activity was maintained for five consecutive catalytic cycles, with an overall turn-over number of 8967. The addition of external surface-active ionic liquid showed unexpected behaviour, because strongly enhanced initial reaction rates were observed.

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Synthesis of 1,8-dioxo-octahydro-xanthene and tetrahydrobenzo[b]pyran derivatives promoted by two bis-imidazolium-based ionic liquids

Current Organocatalysis ◽

10.2174/2213337208666210726141934 ◽

2021 ◽

Vol 08 ◽

Author(s):

Maryam Shirzad ◽

Mitra Nasiri ◽

Nader Daneshvar ◽

Farhad Shirini ◽

Hassan Tajik

Keyword(s):

Ionic Liquid ◽

Ionic Liquids ◽

Knoevenagel Condensation ◽

Reaction Rates ◽

Xanthene Derivatives ◽

Acidic Ionic Liquids ◽

Dicationic Ionic Liquids ◽

Acidic Nature ◽

Work Up ◽

Reaction Media

Aim and objective: In this work, we have prepared two bis-dicationic ionic liquids with the same cationic core (Bis-imidazole) and different counter-anions using sulfuric acid and perchloric acids. After that, the efficiency and ability of these compounds as catalysts were investigated and compared in the promotion of Knoevenagel condensation and synthesis of benzo[b]pyran derivatives to see the effect of the anionic counter-part in the reaction. Material and method: In a 25 mL round-bottomed flask, a mixture of aldehyde (1.0 mmol), 1,3-cyclodicarbonyl (2.0 mmol) and the desired amount of the mentioned acidic ionic liquids was heated at 90°C in the absence of solvent (Reaction A) or In a 25 mL round-bottomed flask, a mixture of aldehyde (1.0 mmol), 1,3-cyclodicarbonyl (1.0 mmol), malononitrile, (1.1 mmol) and optimized amounts of the ionic liquid in water (3.0 mL) was heated at 80°C (Reaction B) for the appropriated time. After the completion of the reactions which were monitored by TLC (n-hexane: EtOAc; 3:1), 10 mL of water was added and the mixture was stirred for 2 minutes. Then, the products were separated by filtration and were washed several times with water. After drying, the pure products were obtained while there was no need to further. Results: Comparison of the obtained results from both of the ionic liquids revealed that [H2-Bisim][HSO4]2 because of its more acidic structure had a more catalytic activity for the preparation of 1,8-dioxo-octahydro-xanthene derivatives but [H2-Bisim][ClO4]2 was relatively more efficient for the synthesis of tetrahydrobenzo[b]pyran derivatives since the stronger acidic nature of [H2-Bisim][HSO4]2 may prevent the simple activation of malononitrile in the reaction media. Conclusion: In this study, we have introduced efﬁcient methods for the synthesis of 1,8-dioxo-octahydro-xanthene and tetrahydrobenzo[b]pyran derivatives in the presence of catalytic amounts of [H2-Bisim][ClO4]2 and [H2-Bisim][HSO4]2 These methods have several advantages such as ease of preparation and handling of the catalysts, high reaction rates, excellent yields, eco-friendly procedures and simple work-up.

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Surface-active ionic liquids in micellar catalysis: impact of anion selection on reaction rates in nucleophilic substitutions

Physical Chemistry Chemical Physics ◽

10.1039/c6cp00493h ◽

2016 ◽

Vol 18 (19) ◽

pp. 13375-13384 ◽

Cited By ~ 43

Author(s):

Alice Cognigni ◽

Peter Gaertner ◽

Ronald Zirbs ◽

Herwig Peterlik ◽

Katharina Prochazka ◽

...

Keyword(s):

Ionic Liquids ◽

Reaction Rates ◽

Micellar Catalysis ◽

Nucleophilic Substitutions ◽

Surface Active

A series of surface-active ionic liquids based on the 1-dodecyl-3-methylimidazolium cation and different anions was synthesized and applied for micellar catalysis of nucleophilic substitutions.

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Colloidal systems of surface active ionic liquids and sodium carboxymethyl cellulose: physicochemical investigations and preparation of magnetic nano-composites

Physical Chemistry Chemical Physics ◽

10.1039/c8cp02841a ◽

2018 ◽

Vol 20 (27) ◽

pp. 18528-18538 ◽

Cited By ~ 3

Author(s):

Gagandeep Singh ◽

Gurbir Singh ◽

Tejwant Singh Kang

Keyword(s):

Ionic Liquid ◽

Ionic Liquids ◽

Carboxymethyl Cellulose ◽

Sodium Carboxymethyl Cellulose ◽

Nano Composites ◽

Colloidal Systems ◽

Surface Active Ionic Liquid ◽

Surface Active ◽

Cellulose Surface

Carboxymethyl cellulose-surface active ionic liquid colloidal formulations for preparation of magnetic nano-composites.

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Concentrated aqueous dispersions of low-defect few-layer thick graphene using surface active ionic liquid for enhanced enzyme activity

Materials Advances ◽

10.1039/d0ma00159g ◽

2020 ◽

Vol 1 (5) ◽

pp. 1364-1370

Author(s):

Gagandeep Singh ◽

Manvir Kaur ◽

Gurbir Singh ◽

Komal Arora ◽

Manpreet Singh ◽

...

Keyword(s):

Ionic Liquid ◽

Enzyme Activity ◽

Ionic Liquids ◽

Physical Adsorption ◽

Graphene Sheets ◽

Aqueous Dispersions ◽

Surface Active Ionic Liquid ◽

Surface Active

Hydrophobically driven physical adsorption of cellulase on graphene sheets exfoliated using surface active ionic liquids.

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Solvation, rotational relaxation and fluorescence correlation spectroscopic study on ionic liquid-in-oil microemulsions containing triple-chain surface active ionic liquids (SAILs)

RSC Advances ◽

10.1039/c6ra13197b ◽

2016 ◽

Vol 6 (78) ◽

pp. 74604-74613 ◽

Cited By ~ 2

Author(s):

Chiranjib Banerjee ◽

Niloy Kundu ◽

Arpita Roy ◽

Debasis Banik ◽

Mintu Halder ◽

...

Keyword(s):

Ionic Liquid ◽

Ionic Liquids ◽

Spectroscopic Study ◽

Rotational Relaxation ◽

Solvation Dynamics ◽

Fluorescence Correlation ◽

Surface Active Ionic Liquid ◽

Surface Active

In this article, solvation dynamics and rotational relaxation approaches have been applied to explore the microheterogeneity of surface active ionic liquid (SAIL) containing microemulsions, i.e. [P13][Tf2N] or [N3111][Tf2N]/[BHD][AOT]/[IPM].

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Application of surface-active ionic liquids in micelle-mediated extraction methods: pre-concentration of cadmium ions by surface-active ionic liquid-assisted cloud point extraction

Journal of the Iranian Chemical Society ◽

10.1007/s13738-019-01770-8 ◽

2019 ◽

Vol 17 (2) ◽

pp. 327-332 ◽

Cited By ~ 2

Author(s):

Farzad Bamdad ◽

Amir Raziani

Keyword(s):

Ionic Liquid ◽

Ionic Liquids ◽

Cloud Point ◽

Cloud Point Extraction ◽

Extraction Methods ◽

Cadmium Ions ◽

Surface Active Ionic Liquid ◽

Surface Active

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Synthesis, Characterization and Applications of Dicationic Ionic Liquids in Organic Synthesis

Mini-Reviews in Organic Chemistry ◽

10.2174/1570193x16666190508091231 ◽

2020 ◽

Vol 17 (4) ◽

pp. 450-464

Author(s):

Mohammad Javaherian ◽

Seyyed Jafar Saghanezhad

Keyword(s):

Ionic Liquids ◽

Organic Synthesis ◽

Chemical Properties ◽

Physical And Chemical Properties ◽

Dicationic Ionic Liquids ◽

Physical And Chemical ◽

Reaction Media ◽

And Chemical Properties

Dicationic ionic liquids are an emerging group of Ionic Liquids (ILs) that are currently receiving much attention as green reaction media and catalysts. Because of a great number of possible combinations of cations and anions, the physical and chemical properties of dicationic ionic liquids are more tunable and broader than monocationic ILs. Therefore, their unique properties have made them the target of many applied and fundamental researches. Actually, dicationic ionic liquids are more effective and rather fascinating than traditional monocationic ILs. So, due to greater versatility and diversity, their applications in organic synthesis have been extensively grown. In this review, we have focused on the synthesis, characterization and applications of dicationic ionic liquids, especially, in organic synthesis.

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