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Recent Advances in Ionic Liquids and Deep Eutectic Solvents for...
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Recent Advances in Ionic Liquids and Deep Eutectic Solvents for Task-Specific Catalysts

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Catalytic Materials".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 7953

Special Issue Editors

Dr. Sudhir Ravula

E-Mail Website
Guest Editor
Louisiana State University Health Sciences, Department of Oral & Craniofacial biology, New Orleans, LA 70119, USA
Interests: catalysis, ionic liquids and deep eutectic solvents, green chemistry, two-dimensional materials, biomass, separation, organic chemistry, biomaterials, dental materials
Dr. Chandan Giri

E-Mail Website
Guest Editor
The Department of Chemistry at the University of Alabama, Tuscaloosa, AL, USA
Interests: mechanistic studies of polymerization in Ionic Liquid

Special Issue Information

Dear Colleagues, 

Ionic liquids (ILs) and deep eutectic solvents (DESs) have gained tremendous attention due to their tunable physicochemical properties such as low vapor pressure, good thermal stability, ionic conductivity, wide range of electrochemical stability, etc. This advent of innovative solvents opened new avenues with target-specific applications for materials (nanostructured, (metal)nanoparticles), catalysts (catalytic and biocatalytic reaction process, air and water purification, separations, etc.), biomass, and energy (batteries, hydrogen and oxygen production, cellulosic ethanol, biodiesel, etc.). To further emphasis on developing efficient and sustainable technologies, a conscious design of chemicals and the use of structure-activity relationships are essential tools to deliver safer chemicals. This Special Issue is designed to give a comprehensive overview of the “state-of-the-art” to the most recent advancement in the field through sustainable chemical approaches. This Special Issue invite researchers to contribute their findings covering all aspects broadly as mentioned to promote the latest developments in research and innovation through sustainable strategies and characterization.

Dr. Sudhir Ravula
Dr. Chandan Giri
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Catalysts is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Ionic liquids
  • Deep eutectic solvents
  • Sustainable
  • Biomass
  • Nanomaterials
  • Catalysts
  • Biocatalysts
  • Electrochemical applications
  • Batteries
  • Biofuel
  • Separation process

Published Papers (2 papers)

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Research

17 pages, 9860 KiB  
Article
L-Proline-Based Natural Deep Eutectic Solvents as Efficient Solvents and Catalysts for the Ultrasound-Assisted Synthesis of Aurones via Knoevenagel Condensation
by Maria-Anna Karadendrou, Ioanna Kostopoulou, Vasiliki Kakokefalou, Andromachi Tzani and Anastasia Detsi
Catalysts 2022, 12(3), 249; https://doi.org/10.3390/catal12030249 - 22 Feb 2022
Cited by 15 | Viewed by 4557
Abstract
Aurones are minor flavonoids that possess a wide variety of bioactivity, including antioxidant, anticancer, and enzyme inhibitory activity. L-proline-based natural deep eutectic solvents (NaDES) were synthesized and applied as solvents and catalysts for the Knoevenagel condensation reaction between benzofuranone and substituted benzaldehydes to [...] Read more.
Aurones are minor flavonoids that possess a wide variety of bioactivity, including antioxidant, anticancer, and enzyme inhibitory activity. L-proline-based natural deep eutectic solvents (NaDES) were synthesized and applied as solvents and catalysts for the Knoevenagel condensation reaction between benzofuranone and substituted benzaldehydes to produce aurones in high yields and purity. The reaction between benzofuranone and vanillin served as the model reaction. After screening three NaDESs, and testing microwave, as well as ultrasound as energy sources, we concluded that the optimum results are obtained using L-proline/glycerol 1:2 as catalyst and solvent and ultrasound irradiation. The scope of the reaction was evaluated using a variety of benzaldehydes, and the corresponding aurones were obtained in moderate to satisfactory yields (57–89%) and high purity. An important additional feature of the described methodology is the recyclability and reusability of the NaDES, which was recycled and effectively reused after 6 cycles. Full article
(This article belongs to the Special Issue Recent Advances in Ionic Liquids and Deep Eutectic Solvents for Task-Specific Catalysts)
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13 pages, 7451 KiB  
Article
Sustainable Production of Glycolipids by Biocatalyst on Renewable Deep Eutectic Solvents
by Laura V. Hoyos, Laura Ramírez, Cristhian J. Yarce, Carlos Alvarez-Vasco and Nelson H. Caicedo Ortega
Catalysts 2021, 11(7), 853; https://doi.org/10.3390/catal11070853 - 16 Jul 2021
Cited by 4 | Viewed by 2671
Abstract
Glycolipids have become an ecofriendly alternative to chemically obtained surfactants, mainly for the cosmetic, pharmaceutical, and food industries. However, the sustainable production of these compounds is still challenging, because: (i) water is a recognized inhibitor, (ii) multiphases make the [...] Read more.
Glycolipids have become an ecofriendly alternative to chemically obtained surfactants, mainly for the cosmetic, pharmaceutical, and food industries. However, the sustainable production of these compounds is still challenging, because: (i) water is a recognized inhibitor, (ii) multiphases make the use of cosolvent reaction medium necessary, and (iii) there are difficulties in finding a source for both starting materials. This study used sugars and lipids from peach palm fruit shells or model compounds as substrates to synthesize glycolipids on five different renewable deep eutectic solvents (Re-DES) alone or with a cosolvent system. Substrate conversions up to 24.84% (so far, the highest reported for this reaction on DES), showing (1) the non-precipitation of glucose in the solvent, (2) emulsification and (3) low viscosity (e.g., more favorable mass transfer) as the main limiting factors for these heterogeneous enzymatic processes. The resulting conversion was reached using a cosolvent system Re-DES:DMSO:t-butanol that was robust enough to allow conversions in the range 19–25%, using either model compounds or sugar and fatty acid extracts, with free or immobilized enzymes. Finally, the characterization of the in-house synthesized glycolipids by surface tension demonstrated their potential as biosurfactants, for instance, as an alternative to alcohol ethoxylates, industrially produced using less sustainable methods. Full article
(This article belongs to the Special Issue Recent Advances in Ionic Liquids and Deep Eutectic Solvents for Task-Specific Catalysts)
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