Biocatalytic synthesis of panthenyl monoacyl esters in ionic liquids and deep eutectic solvents

2019 ◽  
Vol 21 (12) ◽  
pp. 3353-3361 ◽  
Author(s):  
Pedro Lozano ◽  
Elena Alvarez ◽  
Susana Nieto ◽  
Rocio Villa ◽  
Juana M. Bernal ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Ionic Liquids ◽  
Lauric Acid ◽  
Enzymatic Synthesis ◽  
Deep Eutectic Solvents ◽  
Direct Esterification ◽  
Eutectic Mixtures

The enzymatic synthesis of panthenyl monoacyl esters was carried out by the direct esterification of fatty acids (e.g. lauric acid) with panthenol in sponge-like ionic liquids, as well as in deep eutectic mixtures, resulting in highly selective processes (i.e. near to 100% for the panthenyl monolaurate case).

Electrochemical Synthesis of Conducting Polymers Involving Deep Eutectic Solvents

2020 ◽  
Vol 16 (4) ◽  
pp. 478-494 ◽  
Author(s):  
Florentina Golgovici ◽  
Liana Anicai ◽  
Andreea Florea ◽  
Teodor Visan
Keyword(s):  
Ionic Liquids ◽  
Conducting Polymers ◽  
Electrochemical Synthesis ◽  
Conductive Polymers ◽  
Electrochemical Polymerization ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Widespread Application ◽  
Eutectic Mixtures ◽  
New Findings

Background: Deep eutectic solvents (DESs) represent a new generation of ionic liquids which are widely promoted as “green solvents”. They are gaining widespread application in materials chemistry and electrochemistry. DESs are defined as eutectic mixtures of quaternary ammonium salt with a hydrogen bond donor in certain molar ratios. Their use as solvents for electrochemical synthesis of conducting polymers could influence the polymer properties and reduce their economic cost. Objective: This review presents the most recent results regarding the electropolymerization of common conductive polymers involving choline chloride based ionic liquids. New findings from our laboratory on the electrochemical growth of conductive polymers are also discussed. Methods: The electrochemical polymerization mechanisms during synthesis of polypyrrole (PPy), polyaniline (PANI) and poly(3,4-ethylenedioxythiophene) (PEDOT) using various formulations of DESs are reviewed, as well as their characteristics, mainly from surface morphology view point. Results: Some general information related to the preparation and characterization of DESs is also presented, followed by an overview of the recent advances in the field of electropolymerization using DESs. Conclusion: Electropolymerization of conducting polymers involving DESs represents an attractive route of synthesis due to their compositional flexibility which makes possible the preparation of unlimited formulations further influencing the polymer morphology and properties. The use of these inexpensive eutectic mixtures has a large potential to contribute to the development of more sustainable technological processes meeting many of the required features characteristic to the green chemistry.

scholarly journals Evaluation of the antimicrobial performance of menthol and menthol-based deep eutectic solvents as potential future antibiotic

2021 ◽  
Vol 287 ◽  
pp. 02010
Author(s):  
Nor Azrini Nadiha Azmi ◽  
Amal Elgharbawy ◽  
Hamzah Mohd Salleh ◽  
Adeeb Hayyan
Keyword(s):  
Fatty Acids ◽  
Octanoic Acid ◽  
Deep Eutectic Solvents ◽  
Decanoic Acid ◽  
Antimicrobial Activities ◽  
Gram Negative Bacteria ◽  
Eutectic Mixtures ◽  
Start Up ◽  
Antimicrobial Performance ◽  
Insight Into

Triggered by the strong antimicrobial activities of menthol and various fatty acids, eutectic mixtures based on the components are developed, producing new solvents that have possibilities to become a new antibiotic. This study aims to provide an insight into the antimicrobial activities of the new deep eutectic solvents (DESs) developed. Menthol-based DES combined with fatty acids, namely propionic acid, butanoic acid, hexanoic acid, octanoic acid, decanoic acid, and levulinic acid, were successfully obtained and their thermal profile was analyzed. The antimicrobial potential of DES systems was evaluated against both Gram positive and Gram negative bacteria. Owing to the activities of the start-up components, the results are considered promising, and this illustrates the potential of the newly obtained DESs as a new antimicrobial agent in various fields such as food, cosmetics as well as pharmaceutical.

Green Extraction of Volatile Fatty Acids from Fermented Wastewater Using Hydrophobic Deep Eutectic Solvents

Fermentation ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 226
Author(s):  
Ahmad S. Darwish ◽  
Samah E. E. Warrag ◽  
Tarek Lemaoui ◽  
Maha K. Alseiari ◽  
Farah Abu Hatab ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Lauric Acid ◽  
Volatile Fatty Acids ◽  
Eutectic Mixture ◽  
Deep Eutectic Solvents ◽  
Green Extraction ◽  
Platform Chemicals ◽  
Liquid Liquid Extraction ◽  
Multi Stage ◽  
New Generation

Volatile fatty acids (VFAs) are carboxylic acids mainly produced via the fermentation of organic waste streams. Being industrial platform chemicals, sustainable, green and economical recovery of VFAs is necessary. Herein, hydrophobic deep eutectic solvents (HDES), “a new generation of water-immiscible designer solvents”, were assessed for the recovery of VFAs via liquid–liquid extraction. The eutectic mixture of menthol-lauric acid exhibited the highest stability and hydrophobicity. The binary solubility of the pairs {VFA in water} and {VFA in HDES}—and the saturation of the HDES with water were measured. Furthermore, the influences of key parameters on the extraction efficiency were investigated. On multi-stage extraction, an efficiency of 88% was achieved in 4 stages, and the HDES was successfully regenerated using vacuum evaporation. The HDES performance was also compared to other reported relevant solvents. It was concluded that menthol-lauric acid HDES is a promising candidate for the green extraction of VFAs from fermented wastewater.

scholarly journals Dissolution of Chitin in Deep Eutectic Solvents Composed of Imidazolium Ionic Liquids and Thiourea

2019 ◽  
Vol 3 (4) ◽  
pp. 90 ◽  
Author(s):  
Satoshi Idenoue ◽  
Kazuya Yamamoto ◽  
Jun-ichi Kadokawa
Keyword(s):  
Hydrogen Bond ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Ccd Camera ◽  
Deep Eutectic Solvents ◽  
The Other ◽  
Imidazolium Ionic Liquids ◽  
Eutectic Mixtures ◽  
Organic Resource

Chitin is an abundant organic resource but shows poor solubility, leading to difficulty in utilization as materials. We have already reported that an ionic liquid (IL), 1-allyl-3-methylimidazolium bromide, dissolves chitin at concentrations up to ca. 5 wt %. However, the color of the resulting solution is blackened, mainly owing to the presence of bromide. On the other hand, some deep eutectic solvents (DESs) have been already reported to dissolve chitin. In this study, we found that DESs composed of imidazolium ILs and thiourea dissolved chitin without obvious coloring. DESs are systems formed from eutectic mixtures of hydrogen bond accepters and donors. We first prepared DESs by heating mixtures of imidazolium ILs with thiourea at 100 °C for 30 min with stirring. Predetermined amounts of chitin were then added to the DESs, and for the dissolution, the mixtures were left standing at room temperature for 24 h, followed by heating at 100 °C for 24 h with stirring. The dissolution processes were evaluated by CCD camera views, which revealed in most cases the dissolution of chitin at 2–5 wt % concentrations with the present DESs.

scholarly journals Solvent-free enzymatic synthesis of 1, 3-Diacylglycerols by direct esterification of glycerol with saturated fatty acids

2013 ◽  
Vol 12 (1) ◽  
pp. 65 ◽  
Author(s):  
Nanjing Zhong ◽  
Zhongyu Gui ◽  
Li Xu ◽  
Jianrong Huang ◽  
Kun Hu ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Enzymatic Synthesis ◽  
Saturated Fatty Acids ◽  
Solvent Free ◽  
Direct Esterification

scholarly journals Enzymatic Synthesis of Glucose-Based Fatty Acid Esters in Bisolvent Systems Containing Ionic Liquids or Deep Eutectic Solvents

Molecules ◽  
2016 ◽  
Vol 21 (10) ◽  
pp. 1294 ◽  
Author(s):  
Kai-Hua Zhao ◽  
Yu-Zheng Cai ◽  
Xiao-Sheng Lin ◽  
Jun Xiong ◽  
Peter Halling ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Fatty Acid ◽  
Enzymatic Synthesis ◽  
Deep Eutectic Solvents ◽  
Fatty Acid Esters ◽  
Acid Esters

A Green Approach for Producing Solvent-free Anisyl Acetate by Enzymecatalyzed Direct Esterification in Sponge-like Ionic Liquids Under Conventional and Microwave Heating

2013 ◽  
Vol 1 (2) ◽  
pp. 145-154 ◽  
Author(s):  
Pedro Lozano ◽  
Juana Bernal ◽  
Almudena Lajarin ◽  
Daniel Romera ◽  
Eduardo Garcia-Verdugo ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Microwave Heating ◽  
Solvent Free ◽  
Direct Esterification ◽  
Green Approach

Green Chemistry and Green Solvents: An Overview

2020 ◽  
Vol 7 (3) ◽  
pp. 314-325
Author(s):  
Barla Karuna Devi ◽  
Swathi Naraparaju ◽  
Chaganti Soujanya ◽  
Sayan Dutta Gupta
Keyword(s):  
Ionic Liquids ◽  
Green Chemistry ◽  
Chemical Reaction ◽  
Supercritical Co2 ◽  
Environmental Problems ◽  
Green Solvents ◽  
Eutectic Mixtures ◽  
Organic Carbonates

: Green chemistry emphasizes designing novel routes to overcome health and environmental problems that occur during a chemical reaction. Green solvents are used in place of conventional solvents that are hazardous to both human and the environment. Solvents like water, ionic liquids, supercritical CO2, biosolvents, organic carbonates, and deep eutectic mixtures can be used as green solvents. The review focuses on the properties, applications, and limitations of these solvents.

scholarly journals Enzymatic Synthesis of Cyclopropane Fatty Acids Catalyzed by Bacterial Extracts

1963 ◽  
Vol 238 (4) ◽  
pp. 1242-1248
Author(s):  
H. Zalkin ◽  
John H. Law ◽  
Howard Goldfine
Keyword(s):  
Fatty Acids ◽  
Enzymatic Synthesis ◽  
Cyclopropane Fatty Acids
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