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Paporakis S, Liu KTC, Brown SJ, Harper JB, Martin AV, Greaves TL. Thermal Stability of Protic Ionic Liquids. J Phys Chem B 2024; 128:4208-4219. [PMID: 38650054 DOI: 10.1021/acs.jpcb.3c08011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
While protic ionic liquids (ILs) have found great success as solvents for a broad range of applications, little is known about their degradation when exposed to temperatures above ambient for extended periods of time. Here, we report the thermal stability of six protic ILs, namely, ethylammonium nitrate, ethylammonium formate, ethylammonium acetate, ethanolammonium nitrate, ethanolammonium formate, and ethanolammonium acetate. The effect of heating each ionic liquid to 60 °C for 1 h or 1 week (sealed or open to the atmosphere) was evaluated by considering the changes to water content, pH, mass, thermal phase transitions, and molecular structure after each treatment. Heating each of the six ILs when sealed led to measurable shifts in their water content and 10 wt % pH, but there was no significant change in their mass, thermal phase transitions according to differential scanning calorimetry (DSC), or molecular structure using proton nuclear magnetic resonance (1H NMR) spectra, indicating that the samples were largely unchanged. The samples that were heated open to the atmosphere also displayed no significant changes after 1 h but displayed significant changes after 1 week.
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Affiliation(s)
- Stefan Paporakis
- School of Science, College of STEM, RMIT University, 124 La Trobe Street, Melbourne ,VIC 3000, Australia
| | - Kenny T-C Liu
- School of Science, College of STEM, RMIT University, 124 La Trobe Street, Melbourne ,VIC 3000, Australia
| | - Stuart J Brown
- School of Science, College of STEM, RMIT University, 124 La Trobe Street, Melbourne ,VIC 3000, Australia
| | - Jason B Harper
- School of Chemistry, University of New South Wales, UNSW, Sydney, NSW 2052, Australia
| | - Andrew V Martin
- School of Science, College of STEM, RMIT University, 124 La Trobe Street, Melbourne ,VIC 3000, Australia
| | - Tamar L Greaves
- School of Science, College of STEM, RMIT University, 124 La Trobe Street, Melbourne ,VIC 3000, Australia
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2
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Moustafa AHE, Abdel-Rahman HH, Hagar M, Aouad MR, Rezki N, Bishr SAA. Anticorrosive performance of newly synthesized dipyridine based ionic liquids by experimental and theoretical approaches. Sci Rep 2023; 13:19197. [PMID: 37932361 PMCID: PMC10628253 DOI: 10.1038/s41598-023-45822-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 10/24/2023] [Indexed: 11/08/2023] Open
Abstract
Two newly synthetic nontoxic dipyridine-based ionic liquids (PILs) with the same chain lengths and different polar groups were investigated: bispyridine-1-ium tetrafluoroborate (BPHP, TFPHP) with terminal polar groups Br and CF3, respectively, on Carbon steel (CS) in 8M H3PO4 as corrosion inhibitors. Their chemical structure was verified by performing 1HNMR and 13CNMR. Their corrosion inhibition was investigated by electrochemical tests, especially as mass transfer with several characterizations: Scanning electron microscope/Energy dispersive X-ray spectroscopy (SEM-EDX), UV-visible, Atomic force microscope, Atomic absorbance spectroscopy, X-ray Photoelectron Spectroscopy and Gloss value. Theoretical calculation using density functional theory by calculating several parameters, molecular electrostatic potential, Fukui Indices, and Local Dual Descriptors were performed to demonstrate the reactivity behavior and the reactive sites of two molecules with a concentration range (1.25-37.5 × 10-5 M) and temperature (293-318 K). The maximum inhibition efficiency (76.19%) and uniform coverage were sufficient for BPHP at an optimum concentration of 37.5 × 10-5 M with the lowest temperature of 293 K. TFPHP recorded 71.43% at the same conditions. Two PILs were adsorbed following the El-Awady adsorption isotherm, including physicochemical adsorption. The computational findings agree with Electrochemical measurements and thus confirm CS's corrosion protection in an aggressive environment.
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Affiliation(s)
- Amira Hossam Eldin Moustafa
- Chemistry Department, Faculty of Science, Alexandria University, P.O. 426 Ibrahemia, Alexandria, 21321, Egypt.
| | - Hanaa H Abdel-Rahman
- Chemistry Department, Faculty of Science, Alexandria University, P.O. 426 Ibrahemia, Alexandria, 21321, Egypt
| | - Mohamed Hagar
- Chemistry Department, Faculty of Science, Alexandria University, P.O. 426 Ibrahemia, Alexandria, 21321, Egypt
- Faculty of Advanced Basic Sciences, Alamein International University, Alamein, Matrouh Governorate, Egypt
| | - Mohamed R Aouad
- Chemistry Department, College of Science, Taibah University, 30002, Al-Madinah Al-Munawarah, Saudi Arabia
| | - Nadjet Rezki
- Chemistry Department, College of Science, Taibah University, 30002, Al-Madinah Al-Munawarah, Saudi Arabia
| | - Sherif A A Bishr
- Chemistry Department, Faculty of Science, Alexandria University, P.O. 426 Ibrahemia, Alexandria, 21321, Egypt
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3
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Mulk WU, Ali SA, Shah SN, Shah MUH, Zhang QJ, Younas M, Fatehizadeh A, Sheikh M, Rezakazemi M. Breaking boundaries in CO2 capture: Ionic liquid-based membrane separation for post-combustion applications. J CO2 UTIL 2023; 75:102555. [DOI: 10.1016/j.jcou.2023.102555] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
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4
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Dhattarwal HS, Kashyap HK. Microstructures of Choline Amino Acid based Biocompatible Ionic Liquids. CHEM REC 2023; 23:e202200295. [PMID: 36960931 DOI: 10.1002/tcr.202200295] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 02/26/2023] [Indexed: 03/25/2023]
Abstract
Bio-compatible ionic liquids (Bio-ILs) represent a class of solvents with peculiar properties and exhibit huge potential for their applications in different fields of chemistry. Ever since they were discovered, researchers have used bio-ILs in diverse fields such as biomass dissolution, CO2 sequestration, and biodegradation of pesticides. This review highlights the ongoing research studies focused on elucidating the microscopic structure of bio-ILs based on cholinium cation ([Ch]+ ) and amino acid ([AA]- ) anions using the state-of-the-arta b i n i t i o ${ab\hskip0.25eminitio}$ and classical molecular dynamics (MD) simulations. The microscopic structure associated with these green ILs guides their suitability for specific applications. ILs of this class differ in the side chain of the amino acid anions, and varying the side chain significantly affects the structure of these ILs and thus helps in tuning the efficiency of biomass dissolution. This review demonstrates the central role of the side chain on the morphology of choline amino acid ([Ch][AA]) bio-ILs. The seemingly matured field of bio-ILs and their employment in various applications still holds significant potential, and the insights on their microscopic structure would steer the field of target specific application of these green ILs.
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Affiliation(s)
- Harender S Dhattarwal
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
| | - Hemant K Kashyap
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
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Eltayeb S, Marzabadi CH. Synthesis of pyranobenzopyrans from D-glucal using ionic liquids. Carbohydr Res 2023; 531:108873. [PMID: 37421875 DOI: 10.1016/j.carres.2023.108873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/31/2023] [Accepted: 06/12/2023] [Indexed: 07/10/2023]
Abstract
Imidazolium room temperature ionic liquids (RTILs) were used as solvents in the Lewis acid-catalyzed cycloaddition reactions of D-glucal with substituted salicylaldehydes. These reactions selectively led to various, novel, cis-pyrano [4,3-b]benzopyrans in modest yields, different products than those isolated from analogous solution studies. Furan diol was isolated as the major byproduct from all the reactions. The use of RTILs facilitated the use of unprotected sugars in these reactions.
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Affiliation(s)
- Sumiea Eltayeb
- Department of Chemistry & Biochemistry, Seton Hall University, 400 South Orange Ave, South Orange, NJ, 07079, USA
| | - Cecilia H Marzabadi
- Department of Chemistry & Biochemistry, Seton Hall University, 400 South Orange Ave, South Orange, NJ, 07079, USA.
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6
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LIonomers-New Generation of Ionomer: Understanding of Their Interaction and Structuration as a Function of the Tunability of Cation and Anion. Polymers (Basel) 2023; 15:polym15020370. [PMID: 36679248 PMCID: PMC9865942 DOI: 10.3390/polym15020370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/29/2022] [Accepted: 12/31/2022] [Indexed: 01/13/2023] Open
Abstract
In this work, by combining maleic anhydride-grafted polypropylene (PPgMA) and three different ionic liquids (ILs), i.e., tributyl (ethyl) phosphonium diethyl phosphate (denoted P+DEP), 1-ethyl-3-methylimidazolium diethyl phosphate (denoted EMIM DEP), and 1-ethyl-3-methylimidazolium acetate (denoted EMIM Ac), new ionic PP/IL polymer materials are generated and denoted as LIonomers. The structuration of ILs in LIonomers occurs from a nano/microphase separation process proved by TEM. NMR analyses reveal the existence of ionic-ionic and ionic-dipolar interactions between PPgMA and ILs within LIonomers. The rheological behavior of such IL/polymer combinations interpret the existence of interactions between maleic anhydride group and cation or anion composing the ionic liquid. These interactions can be tuned by the nature of cation (P+DEP vs. EMIM DEP) and anion (EMIM DEP vs. EMIM Ac) but also depend on the IL content. Thermal analyses demonstrate that IL could affect the crystallization process according to different pathways. Thanks to the maleic anhydride/IL interactions, an excellent compromise between stiffness and stretchability is obtained paving the way for processing new polyolefin-based materials.
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A Catalyst-free route for the green and efficient synthesis of 2H-chromene-2-thiones in Neutral Ionic Liquid. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Lim JR, Chua LS, Mustaffa AA. Ionic liquids as green solvent and their applications in bioactive compounds extraction from plants. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.10.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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A Copper‐catalysed Facile Synthesis of Highly Functionalized Aryl Sulphones in Guanidinium IL(GIL) aided with Ultrasound. ChemistrySelect 2022. [DOI: 10.1002/slct.202202033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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10
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Andreev I, Boichenko M, Ratmanova N, Ivanova O, Levina I, Khrustalev V, Sedov I, Trushkov I. 4‐(Dimethylamino)pyridinium Azide in Protic Ionic Liquid Media as a Stable Equivalent of Hydrazoic Acid. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200486] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ivan Andreev
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology Oncology and Immunology RUSSIAN FEDERATION
| | - Maksim Boichenko
- Lomonosov Moscow State University Department of Chemistry RUSSIAN FEDERATION
| | - Nina Ratmanova
- Dmitry Rogachev National Medical Research Center of Pediatric Hematology Oncology and Immunology RUSSIAN FEDERATION
| | | | - Irina Levina
- FSBSI Institute of Biochemical Physics named after N M Emanuel of the Russian Academy of Sciences RUSSIAN FEDERATION
| | | | - Igor Sedov
- Kazan Federal University RUSSIAN FEDERATION
| | - Igor Trushkov
- N.D. Zelinsky Institute of Organic Chemistry RUSSIAN FEDERATION
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11
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Kuczak M, Musiał M, Malarz K, Rurka P, Zorębski E, Musioł R, Dzida M, Mrozek-Wilczkiewicz A. Anticancer potential and through study of the cytotoxicity mechanism of ionic liquids that are based on the trifluoromethanesulfonate and bis(trifluoromethylsulfonyl)imide anions. JOURNAL OF HAZARDOUS MATERIALS 2022; 427:128160. [PMID: 34979392 DOI: 10.1016/j.jhazmat.2021.128160] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 12/05/2021] [Accepted: 12/24/2021] [Indexed: 06/14/2023]
Abstract
Ionic liquids (ILs) are known for their unique physicochemical properties. However, despite the great number of published papers, still little attention has been paid to their biological activity. Anticancer potential and the molecular mechanisms underlying the toxicity of these compounds are especially interesting and still unexplored. In the current work, a broad analysis of the cytotoxicity towards colon and breast cancers as well as glioblastoma of the ILs with pyridinium, piperidinium, pyrrolidinium, and imidazolium cations and trifluoromethanesulfonate or bis(trifluoromethylsulfonyl)imide anions indicated previously as the most toxic for normal human dermal fibroblasts were presented. In the case of MCF-7 cells, the activity of 1-decyl-3-methylimidazolium trifluoromethanesulfonate was more than twice as high as cisplatin. It was found that the inhibition of the cell cycle of colon cancer and glioblastoma cells occurs in different phases. More importantly, the different types of cell death were detected for both selected ILs, namely 1-hexyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide and 1-hexyl-3-methylimidazolium trifluoromethane-sulfonate, on colon cancer and glioblastoma, respectively, apoptosis and autophagy, confirmed at the gene and protein levels. Additionally, kinetic studies of the reactive oxygen species indicated that the tested ILs disturbed the cellular redox homeostasis.
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Affiliation(s)
- Micha Kuczak
- A. Chełkowski Institute of Physics and Silesian Center for Education and Interdisciplinary Research, University of Silesia in Katowice, 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland; Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, 40-006 Katowice, Poland
| | - Małgorzata Musiał
- A. Chełkowski Institute of Physics and Silesian Center for Education and Interdisciplinary Research, University of Silesia in Katowice, 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - Katarzyna Malarz
- A. Chełkowski Institute of Physics and Silesian Center for Education and Interdisciplinary Research, University of Silesia in Katowice, 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - Patryk Rurka
- A. Chełkowski Institute of Physics and Silesian Center for Education and Interdisciplinary Research, University of Silesia in Katowice, 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - Edward Zorębski
- Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, 40-006 Katowice, Poland
| | - Robert Musioł
- Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, 40-006 Katowice, Poland
| | - Marzena Dzida
- Institute of Chemistry, University of Silesia in Katowice, Szkolna 9, 40-006 Katowice, Poland
| | - Anna Mrozek-Wilczkiewicz
- A. Chełkowski Institute of Physics and Silesian Center for Education and Interdisciplinary Research, University of Silesia in Katowice, 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland.
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Recent Advances in Copper-Based Solid Heterogeneous Catalysts for Azide-Alkyne Cycloaddition Reactions. Int J Mol Sci 2022; 23:ijms23042383. [PMID: 35216495 PMCID: PMC8874673 DOI: 10.3390/ijms23042383] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/14/2022] [Accepted: 02/15/2022] [Indexed: 02/04/2023] Open
Abstract
The copper(I)-catalyzed azide−alkyne cycloaddition (CuAAC) reaction is considered to be the most representative ligation process within the context of the “click chemistry” concept. This CuAAC reaction, which yields compounds containing a 1,2,3-triazole core, has become relevant in the construction of biologically complex systems, bioconjugation strategies, and supramolecular and material sciences. Although many CuAAC reactions are performed under homogenous conditions, heterogenous copper-based catalytic systems are gaining exponential interest, relying on the easy removal, recovery, and reusability of catalytically copper species. The present review covers the most recently developed copper-containing heterogenous solid catalytic systems that use solid inorganic/organic hybrid supports, and which have been used in promoting CuAAC reactions. Due to the demand for 1,2,3-triazoles as non-classical bioisosteres and as framework-based drugs, the CuAAC reaction promoted by solid heterogenous catalysts has greatly improved the recovery and removal of copper species, usually by simple filtration. In so doing, the solving of the toxicity issue regarding copper particles in compounds of biological interest has been achieved. This protocol is also expected to produce a practical chemical process for accessing such compounds on an industrial scale.
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Application of Ionic Liquids for the Recycling and Recovery of Technologically Critical and Valuable Metals. ENERGIES 2022. [DOI: 10.3390/en15020628] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Population growth has led to an increased demand for raw minerals and energy resources; however, their supply cannot easily be provided in the same proportions. Modern technologies contain materials that are becoming more finely intermixed because of the broadening palette of elements used, and this outcome creates certain limitations for recycling. The recovery and separation of individual elements, critical materials and valuable metals from complex systems requires complex energy-consuming solutions with many hazardous chemicals used. Significant pressure is brought to bear on the improvement of separation and recycling approaches by the need to balance sustainability, efficiency, and environmental impacts. Due to the increase in environmental consciousness in chemical research and industry, the challenge for a sustainable environment calls for clean procedures that avoid the use of harmful organic solvents. Ionic liquids, also known as molten salts and future solvents, are endowed with unique features that have already had a promising impact on cutting-edge science and technologies. This review aims to address the current challenges associated with the energy-efficient design, recovery, recycling, and separation of valuable metals employing ionic liquids.
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Chakraborty S, Rudra Paul A, Majumdar S. Base and metal free true recyclable medium for Knoevenagel condensation reaction in SDS-ionic liquid-aqueous miceller composite system. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100294] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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15
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Modulation of micellization behavior of imidazolium based surface active ionic liquids by aromatic anions in aqueous medium. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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16
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Liquid-liquid equilibrium data for the ternary system based on ionic liquid + organic solvents + water at 298 K and atmospheric pressure applied in antidepressant partitioning. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119532] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Buarque FS, Guimarães DE, Soares CM, Souza RL, Pereira MM, Lima ÁS. Ethanolic two-phase system formed by polypropylene glycol, ethylene glycol and/or ionic liquid (phase-forming or adjuvant) as a platform to phase separation and partitioning study. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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A review of green solvent extraction techniques and their use in antibiotic residue analysis. J Pharm Biomed Anal 2021; 209:114487. [PMID: 34864593 DOI: 10.1016/j.jpba.2021.114487] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 11/03/2021] [Accepted: 11/19/2021] [Indexed: 12/31/2022]
Abstract
Antibiotic residues are being continuously recognized in the aquatic environment and in food. Though the concentration of antibiotic residues is typically low, adverse effects on the environment and human health have been observed. Hence, an efficient method to determine numerous antibiotic residues should be simple, inexpensive, selective, with high throughput and with low detection limits. Liquid-based extractions have been exceedingly used for clean-up and preconcentration of antibiotics prior to chromatographic analysis. In order to make methods more green and environmentally sustainable, conventional hazardous organic solvents can be replaced with green solvents. This review presents sampling strategies as well as comprehensive and up-to-date methods for chemical analysis of antibiotic residues in different sample matrices. Particularly, solvent-based sample preparation techniques using green solvents are discussed along with applications in antibiotic residue analysis.
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Borah B, Chowhan LR. Recent advances in the transition-metal-free synthesis of quinoxalines. RSC Adv 2021; 11:37325-37353. [PMID: 35496411 PMCID: PMC9043781 DOI: 10.1039/d1ra06942j] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 10/30/2021] [Indexed: 01/04/2023] Open
Abstract
Quinoxalines, also known as benzo[a]pyrazines, constitute an important class of nitrogen-containing heterocyclic compounds as a result of their widespread prevalence in natural products, biologically active synthetic drug candidates, and optoelectronic materials. Owing to their importance and chemists' ever-increasing imagination of new transformations of these products, tremendous efforts have been dedicated to finding more efficient approaches toward the synthesis of quinoxaline rings. The last decades have witnessed a marvellous outburst in modifying organic synthetic methods to create them sustainable for the betterment of our environment. The exploitation of transition-metal-free catalysis in organic synthesis leads to a new frontier to access biologically active heterocycles and provides an alternative method from the perspective of green and sustainable chemistry. Despite notable developments achieved in transition-metal catalyzed synthesis, the high cost involved in the preparation of the catalyst, toxicity, and difficulty in removing it from the final products constitute disadvantageous effects on the atom economy and eco-friendly nature of the transformation. In this review article, we have summarized the recent progress achieved in the synthesis of quinoxalines under transition-metal-free conditions and cover the reports from 2015 to date. This aspect is presented alongside the mechanistic rationalization and limitations of the reaction methodologies. The scopes of future developments are also highlighted.
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Affiliation(s)
- Biplob Borah
- School of Applied Material Sciences, Centre for Applied Chemistry, Central University of Gujarat Gandhinagar-382030 India
| | - L Raju Chowhan
- School of Applied Material Sciences, Centre for Applied Chemistry, Central University of Gujarat Gandhinagar-382030 India
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Habibi-Khorassani SM, Shahraki M, Talaiefar S. Full Kinetics and Mechanism Investigation for Generating 4-Substituted 1, 4- Dihydropyridine Derivatives in the Presence of Green Catalyst and Aqueous Medium: Experimental Procedure. Curr Org Synth 2021; 18:598-613. [PMID: 33390117 DOI: 10.2174/1570179417666201231105013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 10/28/2020] [Accepted: 11/05/2020] [Indexed: 11/22/2022]
Abstract
AIMS AND OBJECTIVE The main objective of the kinetic investigation of the reaction between ethyl acetoacetate 1, ammoniumacetat 2, dimedone 3, and diverse substitutions of benzaldehyde 4-X, (X= H, NO2, CN, CF3, Cl, CH (CH3)2, CH3, OCH3, OCH3, and OH) for generating 4-substituted 1, 4-dihydropyridine derivatives (product 5) was to recognize the most realistic reaction mechanism. The layout of the reaction mechanism was studied kinetically via a UV-visible spectrophotometry approach. MATERIALS AND METHODS Among the various mechanisms, only mechanism1 (path1) involving 12 steps was recognized as a dominant mechanism (path1). Herein, the reactions between 1 and 2 (kobs= 814.04 M-1.min-1) and also between 3 and 4-H (kobs= 151.18 M-1.min-1) can be accepted as the first and second steps (step1 and step2) of the reaction mechanism, respectively. Amongst all steps, only step9 of the dominant mechanism (path1) comprised substituent groups (X) near the reaction center. RESULTS AND DISCUSSION Para electron-withdrawing or donating groups on the compound 4-X increased the rate of the reaction 4 times more or decreased 8.7 times less than the benzaldehyde alone. So, this step is sensitive for monitoring any small or huge changes in the reaction rate. Accordingly, step9 is the rate-determining step of the reaction mechanism (path1). CONCLUSION The recent result is in agreement with the Hammett description of an excellent dual substituent factor (r = 0.990) and positive value of reaction constant (ρ= +0.9502), which confirms that both the resonance and inductive effects "altogether" contribute to the reaction center of step9 in the dominant mechanism (path1).
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Affiliation(s)
| | - Mehdi Shahraki
- Department of Chemistry, The University of Sistan and Baluchestan, P. O. Box 98135-674, Zahedan, Iran
| | - Sadegh Talaiefar
- Department of Chemistry, The University of Sistan and Baluchestan, P. O. Box 98135-674, Zahedan, Iran
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22
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Deb B, Debnath S, Chakraborty A, Majumdar S. Bis-indolylation of aldehydes and ketones using silica-supported FeCl 3: molecular docking studies of bisindoles by targeting SARS-CoV-2 main protease binding sites. RSC Adv 2021; 11:30827-30839. [PMID: 35498942 PMCID: PMC9041420 DOI: 10.1039/d1ra05679d] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 09/01/2021] [Indexed: 02/06/2023] Open
Abstract
We report herein an operationally simple, efficient and versatile procedure for the synthesis of bis-indolylmethanes via the reaction of indoles with aldehydes or ketones in the presence of silica-supported ferric chloride under grindstone conditions. The prepared supported catalyst was characterized by SEM and EDX spectroscopy. The present protocol has several advantages such as shorter reaction time, high yield, avoidance of using harmful organic solvents during the reaction and tolerance of a wide range of functional groups. Molecular docking studies targeted toward the binding site of SARS-CoV-2 main protease (3CLpro or Mpro) enzymes were investigated with the synthesized bis-indoles. Our study revealed that some of the synthesized compounds have potentiality to inhibit the SARS-CoV-2 Mpro enzyme by interacting with key amino acid residues of the active sites via hydrophobic as well as hydrogen bonding interactions. Silica supported FeCl3 catalyzed simple protocol for the synthesis of bis-indolylmethanes was explored via grindstone chemistry. Synthesized compounds were screened virtually as inhibitor by targeting the binding site of SARS-CoV-2 main protease enzyme.![]()
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Affiliation(s)
- Barnali Deb
- Department of Chemistry, Tripura University Suryamaninagar 799 022 India +91-381-237-4802 +91-381-237-9070
| | - Sudhan Debnath
- Department of Chemistry, Netaji Subhash Mahavidalaya Tripura 799114 India
| | - Ankita Chakraborty
- Department of Chemistry, Tripura University Suryamaninagar 799 022 India +91-381-237-4802 +91-381-237-9070
| | - Swapan Majumdar
- Department of Chemistry, Tripura University Suryamaninagar 799 022 India +91-381-237-4802 +91-381-237-9070
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23
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Aminov RI, Khusnutdinov RI. Synthesis of Polycyclic Hydrocarbons C 14H 20 by Hydrogenation of exo–exo-, exo–endo-, endo–exo-, and endo–endo-Hexacyclo[9.2.1.0 2,10.0 3,8.0 4,6.0 5,9]tetradec-12-enes with H 2SO 4 and Isomerization of the Products to Diamantane Induced by Ionic Liquids. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rishat I. Aminov
- Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, Prospekt Oktyabrya 141, Ufa 450075, Russian Federation
| | - Ravil I. Khusnutdinov
- Institute of Petrochemistry and Catalysis, Russian Academy of Sciences, Prospekt Oktyabrya 141, Ufa 450075, Russian Federation
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24
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Design, synthesis and characterization of new energetic phthalate plasticizers based on imidazolium ionic liquids. J CHEM SCI 2021. [DOI: 10.1007/s12039-021-01946-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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25
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Magina S, Barros-Timmons A, Ventura SPM, Evtuguin DV. Evaluating the hazardous impact of ionic liquids - Challenges and opportunities. JOURNAL OF HAZARDOUS MATERIALS 2021; 412:125215. [PMID: 33951860 DOI: 10.1016/j.jhazmat.2021.125215] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 01/20/2021] [Accepted: 01/21/2021] [Indexed: 06/12/2023]
Abstract
Ionic liquids (ILs), being related to the design of new environmentally friendly solvents, are widely considered for applications within the "green chemistry" concept. Due to their unique properties and wide diversity, ILs allow tailoring new separation procedures and producing new materials for advanced applications. However, despite the promising technical performance, environmental concerns highlighted in recent studies focused on the toxicity and biodegradability of ILs and their metabolites have revealed that ILs safety labels are not as benign as previously claimed. This review refers to the fundamentals about the properties and applications of ILs also in the context of their potential environmental effect. Toxicological issues and harmful effects related to the use of ILs are discussed, including the evaluation of their biodegradability and ecological impact on diverse organisms and ecosystems, also with respect to bacteria, fungi, and cell cultures. In addition, this review covers the tools used to assess the toxicity of ILs, including the predictive computational models and the results of studies involving cell membrane models and molecular simulations. Summing up the knowledge available so far, there are still no reliable criteria for unequivocal attribution of toxicity and environmental impact credentials for ILs, which is a challenging research task.
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Affiliation(s)
- Sandra Magina
- CICECO-Institute of Materials and Chemistry Department, University of Aveiro, Campus de Santiago, Aveiro P-3810-193, Portugal
| | - Ana Barros-Timmons
- CICECO-Institute of Materials and Chemistry Department, University of Aveiro, Campus de Santiago, Aveiro P-3810-193, Portugal
| | - Sónia P M Ventura
- CICECO-Institute of Materials and Chemistry Department, University of Aveiro, Campus de Santiago, Aveiro P-3810-193, Portugal
| | - Dmitry V Evtuguin
- CICECO-Institute of Materials and Chemistry Department, University of Aveiro, Campus de Santiago, Aveiro P-3810-193, Portugal.
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26
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Ardakani EK, Kowsari E, Ehsani A, Ramakrishna S. Performance of all ionic liquids as the eco-friendly and sustainable compounds in inhibiting corrosion in various media: A comprehensive review. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106049] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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27
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Zunita M, Wahyuningrum D, Buchari B, Bundjali B, Wenten IG. A Concise and Efficient Synthesis of Novel Alkylated 2-(2-hydroxyphenyl)-4,5-diphenylimidazole-based Ionic Liquids Using the MAOS Technique. ORG PREP PROCED INT 2021. [DOI: 10.1080/00304948.2020.1870397] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Megawati Zunita
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Bandung, West Java, Indonesia
| | - Deana Wahyuningrum
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung, West Java, Indonesia
| | - Buchari Buchari
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung, West Java, Indonesia
| | - Bunbun Bundjali
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung, West Java, Indonesia
| | - I Gede Wenten
- Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Bandung, West Java, Indonesia
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28
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Plumet J. 1,3-Dipolar Cycloaddition Reactions of Nitrile Oxides under "Non-Conventional" Conditions: Green Solvents, Irradiation, and Continuous Flow. Chempluschem 2021; 85:2252-2271. [PMID: 33044044 DOI: 10.1002/cplu.202000448] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Revised: 08/11/2020] [Indexed: 01/15/2023]
Abstract
The 1,3-dipolar cycloaddition reactions (DCs) of nitrile oxides (NOs) to alkenes and alkynes are useful methods for the synthesis of 2-isoxazolines and isoxazoles respectively, which are important classes of heterocyclic compounds in organic and medicinal chemistry. Most of these reactions are carried out in organic solvents and under thermal activation. Nevertheless the use of supercritical carbon dioxide (scCO2 ) and ionic liquids (Ils) as alternative solvents and the application of microwave (MW) and ultrasound (US) as alternative activation procedures have evident advantages from the "Green Chemistry" point of view. The critical discussion on the applications of these "unconventional" activation methods and reaction conditions in the 1,3-DCs of NOs is the objective of the present Review.
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Affiliation(s)
- Joaquín Plumet
- Department of Organic Chemistry. Faculty of Chemistry, Complutense University of Madrid, Ciudad Universitaria, 28040, Madrid, Spain
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29
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Green Deep Eutectic Solvents for Microwave-Assisted Biomass Delignification and Valorisation. Molecules 2021; 26:molecules26040798. [PMID: 33557106 PMCID: PMC7913847 DOI: 10.3390/molecules26040798] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/22/2021] [Accepted: 02/01/2021] [Indexed: 11/17/2022] Open
Abstract
Aiming to fulfil the sustainability criteria of future biorefineries, a novel biomass pretreatment combining natural deep eutectic solvents (NaDESs) and microwave (MW) technology was developed. Results showed that NaDESs have a high potential as green solvents for lignin fractionation/recovery and sugar release in the following enzymatic hydrolysis. A new class of lignin derived NaDESs (LigDESs) was also investigated, showing promising effects in wheat straw delignification. MW irradiation enabled a fast pretreatment under mild condition (120 °C, 30 min). To better understand the interaction of MW with these green solvents, the dielectric properties of NaDESs were investigated. Furthermore, a NaDES using the lignin recovered from biomass pretreatment as hydrogen bond donor was prepared, thus paving the way for a “closed-loop” biorefinery process.
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30
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31
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Lengvinaitė D, Klimavičius V, Balevicius V, Aidas K. Computational NMR Study of Ion Pairing of 1-Decyl-3-methyl-imidazolium Chloride in Molecular Solvents. J Phys Chem B 2020; 124:10776-10786. [PMID: 33183008 PMCID: PMC7735725 DOI: 10.1021/acs.jpcb.0c07450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/09/2020] [Indexed: 01/14/2023]
Abstract
The 1H NMR spectra of 10-5 mole fraction solutions of 1-decyl-3-methyl-imidazolium chloride ionic liquid in water, acetonitrile, and dichloromethane have been measured. The chemical shift of the proton at position 2 in the imidazolium ring of 1-decyl-3-methyl-imidazolium (H2) is rather different for all three samples, reflecting the shifting equilibrium between the contact pairs and free fully solvated ions. Classical molecular dynamics simulations of the 1-decyl-3-methyl-imidazolium chloride contact ion pair as well as of free ions in water, acetonitrile, and dichloromethane have been conducted, and the quantum mechanics/molecular mechanics methods have been applied to predict NMR chemical shifts for the H2 proton. The chemical shift of the H2 proton was found to be primarily modulated by hydrogen bonding with the chloride anion, while the influence of the solvents-though differing in polarity and capabilities for hydrogen bonding-is less important. By comparing experimental and computational results, we deduce that complete disruption of the ionic liquid into free ions takes place in an aqueous solution. Around 23% of contact ion pairs were found to persist in acetonitrile. Ion-pair breaking into free ions was predicted not to occur in dichloromethane.
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Affiliation(s)
- Dovilė Lengvinaitė
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Saulėtekio al. 3, LT-10257 Vilnius, Lithuania
| | - Vytautas Klimavičius
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Saulėtekio al. 3, LT-10257 Vilnius, Lithuania
- Eduard-Zintl
Institute for Inorganic and Physical Chemistry, University of Technology Darmstadt, D-64287 Darmstadt, Germany
| | - Vytautas Balevicius
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Saulėtekio al. 3, LT-10257 Vilnius, Lithuania
| | - Kęstutis Aidas
- Institute
of Chemical Physics, Faculty of Physics, Vilnius University, Saulėtekio al. 3, LT-10257 Vilnius, Lithuania
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32
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Abstract
This mini-review briefly describes the recent progress in the design and development of catalysts based on the presence of ionic liquids. In particular, the focus was on heterogeneous systems (supported ionic liquid (IL) phase catalysts (SILPC), solid catalysts with ILs (SCILL), porous liquids), which due to the low amounts of ionic liquids needed for their production, eliminate basic problems observed in the case of the employment of ionic liquids in homogeneous systems, such as high price, high viscosity, and efficient isolation from post-reaction mixtures.
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33
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Affiliation(s)
- Stefan Jopp
- Department of Technical and Analytical Chemistry Institute of Chemistry University of Rostock Albert‐Einstein‐Str. 3a Rostock Germany
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34
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35
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Beneficial Contribution of Biosourced Ionic Liquids and Microwaves in the Michael Reaction. Catalysts 2020. [DOI: 10.3390/catal10080814] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
We developed a synthesis of chiral ionic liquids from proline and one of its derivatives. Nine chiral ionic liquids were synthesized with yields from 78% to 95%. These synthesized ionic liquids played two roles in Michael reactions, as solvents, and as basic catalysts, where the ionic phase could also be reused at least five times without loss of activity. The yields up to 99% were improved by increasing the amount of dimethylmalonate from 1.2 equivalents to 3 or 4 equivalents. Furthermore, the reaction time could be reduced from 24 h to 45 min through microwaves activation.
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36
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Alkyl substituted 4-N-oxazadisilinane cations: A new family of Si protic ionic liquids and its application on esterification reactions. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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37
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38
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Mirhosseini‐Eshkevari B, Ghasemzadeh MA, Esnaashari M. Highly efficient and green approach for the synthesis of spirooxindole derivatives in the presence of novel Brønsted acidic ionic liquids incorporated in UiO‐66 nanocages. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5027] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Boshra Mirhosseini‐Eshkevari
- Department of Chemistry, North Tehran BranchIslamic Azad University PO Box 1913674711 Tehran Iran
- Department of Chemistry, Qom BranchIslamic Azad University PO Box 37491‐13191 Qom Iran
| | | | - Manzarbanoo Esnaashari
- Department of Chemistry, North Tehran BranchIslamic Azad University PO Box 1913674711 Tehran Iran
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39
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Rezki N, Al-Sodies SA, Ahmed HE, Ihmaid S, Messali M, Ahmed S, Aouad MR. A novel dicationic ionic liquids encompassing pyridinium hydrazone-phenoxy conjugates as antimicrobial agents targeting diverse high resistant microbial strains. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.04.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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40
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Zanoni BV, Brasil Romão G, Andrade RS, Barretto Cicarelli RM, Trovatti E, Chiari-Andrèo BG, Iglesias M. Cytotoxic effect of protic ionic liquids in HepG2 and HaCat human cells: in vitro and in silico studies. Toxicol Res (Camb) 2019; 8:447-458. [PMID: 31160977 PMCID: PMC6505392 DOI: 10.1039/c8tx00338f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 02/26/2019] [Indexed: 01/27/2023] Open
Abstract
Protic ionic liquids (PILs) are innovative chemical compounds, which due to their peculiar nature and amazing physico-chemical properties, have been studied as potential sustainable solvents in many areas of modern science, such as in the industrial fields of textile dyeing, pharmaceuticals, biotechnology, energy and many others. Due to their more than probable large-scale use in a short space of time, a wider analysis in terms of ecotoxicity and biological safety to humans has been attracting significant attention, once many ionic liquids were found to be "a little less than green compounds" towards cells and living organisms. The aim of this study is to investigate the cytotoxicity of 13 recently synthesized PILs, as well as to reinforce knowledge in terms of key thermodynamic magnitudes. All the studied compounds were tested for their in vitro toxic activities on two human cell lines (normal keratinocytes HaCaT and hepatocytes HepG2). In addition, due to the enormous number of possible combinations of anions and cations that can form ionic liquids, a group contribution QSAR model has been tested in order to predict their cytotoxicity. The estimated and experimental values were adequately correlated (correlation coefficient R 2 = 0.9260). The experimental obtained results showed their remarkable low toxicity for the studied in vitro systems.
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Affiliation(s)
- Bruna Varela Zanoni
- Universidade de Araraquara - UNIARA , R. Carlos Gomes , 1217 , CEP 14801-340 , Araraquara , SP , Brazil
| | - Gabriela Brasil Romão
- Universidade Federal da Bahia , Rua Aristides Novis , 2 , Federação , CEP 40210-630 , Salvador , BA , Brazil
| | - Rebecca S Andrade
- Universidade Federal do Recôncavo da Bahia , Av. Centenário , 697 , Sim , CEP 44042-280 , Feira de Santana , BA , Brazil .
| | - Regina Maria Barretto Cicarelli
- Universidade Estadual Paulista (UNESP) , Faculdade de Ciências Farmacêuticas , Rod.Araraquara - Jaú , Km 1 , CEP 14800-903 , Araraquara , Brazil
| | - Eliane Trovatti
- Universidade de Araraquara - UNIARA , R. Carlos Gomes , 1217 , CEP 14801-340 , Araraquara , SP , Brazil
| | - Bruna Galdorfini Chiari-Andrèo
- Universidade de Araraquara - UNIARA , R. Carlos Gomes , 1217 , CEP 14801-340 , Araraquara , SP , Brazil
- Universidade Estadual Paulista (UNESP) , Faculdade de Ciências Farmacêuticas , Rod.Araraquara - Jaú , Km 1 , CEP 14800-903 , Araraquara , Brazil
| | - Miguel Iglesias
- Universidade Federal da Bahia , Rua Aristides Novis , 2 , Federação , CEP 40210-630 , Salvador , BA , Brazil
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41
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Alinezhad H, Tajbakhsh M, Maleki B, Pourshaban Oushibi F. Acidic Ionic Liquid [H-NP]HSO4 Promoted One-Pot Synthesis of Dihydro-1H-Indeno[1,2-b]pyridines and Polysubstituted Imidazoles. Polycycl Aromat Compd 2019. [DOI: 10.1080/10406638.2018.1557707] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | | | - Behrooz Maleki
- Department of Chemistry, Hakim Sabzevari University, Sabzevar, Iran
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42
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Veltri L, Cavallo G, Beneduci A, Metrangolo P, Corrente GA, Ursini M, Romeo R, Terraneo G, Gabriele B. Synthesis and thermotropic properties of new green electrochromic ionic liquid crystals. NEW J CHEM 2019. [DOI: 10.1039/c9nj03303c] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New liquid crystal viologens, which exhibit green electrochromic behavior in the LC phase, rarely observed for small molecules, have been developed.
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Affiliation(s)
- Lucia Veltri
- Department of Chemistry and Chemical Technologies
- Università della Calabria
- 87036 Arcavacata di Rende
- Italy
| | - Gabriella Cavallo
- Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- 20131 Milano
- Italy
| | - Amerigo Beneduci
- Department of Chemistry and Chemical Technologies
- Università della Calabria
- 87036 Arcavacata di Rende
- Italy
| | - Pierangelo Metrangolo
- Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- 20131 Milano
- Italy
- VTT-Technical Research Centre of Finland
| | - Giuseppina Anna Corrente
- Department of Chemistry and Chemical Technologies
- Università della Calabria
- 87036 Arcavacata di Rende
- Italy
| | - Maurizio Ursini
- Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- 20131 Milano
- Italy
| | - Roberto Romeo
- Dipartimento di Scienze Chimiche
- Biologiche
- Farmaceutiche e Ambientali
- 98168 Messina
- Italy
| | - Giancarlo Terraneo
- Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta”
- Politecnico di Milano
- 20131 Milano
- Italy
| | - Bartolo Gabriele
- Department of Chemistry and Chemical Technologies
- Università della Calabria
- 87036 Arcavacata di Rende
- Italy
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43
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Lim JY, Mubarak N, Khalid M, Abdullah E, Arshid N. Novel fabrication of functionalized graphene oxide via magnetite and 1-butyl-3-methylimidazolium tetrafluoroborate. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.nanoso.2018.10.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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44
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Singh A, Chopra HK. Synthesis, characterization and applications of some novel DMAP-based chiral ionic liquids. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.06.058] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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45
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Chiarotto I, Mattiello L, Pandolfi F, Rocco D, Feroci M. NHC in Imidazolium Acetate Ionic Liquids: Actual or Potential Presence? Front Chem 2018; 6:355. [PMID: 30211149 PMCID: PMC6121013 DOI: 10.3389/fchem.2018.00355] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 07/30/2018] [Indexed: 11/13/2022] Open
Abstract
Ionic liquids (ILs) are considered in the majority of cases green solvents, due to their virtually null vapor pressure and to the easiness in recycling them. In particular, imidazolium ILs are widely used in many fields of Chemistry, as solvents or precursors of N-heterocyclic carbenes (NHCs). The latter are easily obtained by deprotonation of the C2-H, usually using strong bases or cathodic reduction. Nevertheless, it is known that weaker bases (e.g., triethylamine) are able to promote C2-H/D exchange. From this perspective, the possibility of deprotonating C2-H group of an imidazolium cation by means of a basic counter-ion was seriously considered and led to the synthesis of imidazolium ILs spontaneously containing NHCs. The most famous of this class of ILs are N,N'-disubstituted imidazolium acetates. Due to the particular reactivity of this kind of ILs, they were appointed as “organocatalytic ionic liquids” or “proto-carbenes.” Many papers report the use of these imidazolium acetates in organocatalytic reactions (i. e., catalyzed by NHC) or in stoichiometric NHC reactions (e.g., with elemental sulfur to yield the corresponding imidazole-2-thiones). Nevertheless, the actual presence of NHC in N,N'-disubstituted imidazolium acetate is still controversial. Moreover, theoretical studies seem to rule out the presence of NHC in such a polar environment as an IL. Aim of this Mini Review is to give the reader an up-to-date overview on the actual or potential presence of NHC in such an “organocatalytic ionic liquid,” both from the experimental and theoretical point of view, without the intent to be exhaustive on N,N'-disubstituted imidazolium acetate applications.
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Affiliation(s)
- Isabella Chiarotto
- Dipartimento di Scienze di Base e Applicate per l'Ingegneria, Sapienza University of Rome, Rome, Italy
| | - Leonardo Mattiello
- Dipartimento di Scienze di Base e Applicate per l'Ingegneria, Sapienza University of Rome, Rome, Italy
| | - Fabiana Pandolfi
- Dipartimento di Scienze di Base e Applicate per l'Ingegneria, Sapienza University of Rome, Rome, Italy
| | - Daniele Rocco
- Dipartimento di Scienze di Base e Applicate per l'Ingegneria, Sapienza University of Rome, Rome, Italy
| | - Marta Feroci
- Dipartimento di Scienze di Base e Applicate per l'Ingegneria, Sapienza University of Rome, Rome, Italy
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46
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Maleki B, Raei M, Alinezhad H, Tayebee R, Sedrpoushan A. Chemoselective Synthesis of Tetraketones in Water Catalyzed by Nanostructured Diphosphate Na2CaP2O7. ORG PREP PROCED INT 2018. [DOI: 10.1080/00304948.2018.1462055] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Behrooz Maleki
- Department of Chemistry, Hakim Sabzevari University, Sabzevar, 96179-76487, Iran
| | - Massomeh Raei
- Department of Chemistry, Hakim Sabzevari University, Sabzevar, 96179-76487, Iran
| | | | - Reza Tayebee
- Department of Chemistry, Hakim Sabzevari University, Sabzevar, 96179-76487, Iran
| | - Alireza Sedrpoushan
- Institute of Industrial Chemistry, Iranian Research Organization for Science and Technology, Tehran, Iran
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47
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Dandia A, Jain AK, Sharma S, Singh R. Task-specific Ionic Liquid Mediated Eco-compatible Approach for the Synthesis of Spirooxindole Derivatives and Their DNA Cleavage Activity. J Heterocycl Chem 2018. [DOI: 10.1002/jhet.3178] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Anshu Dandia
- Center for Advance Studies, Department of Chemistry; University of Rajasthan; Jaipur 302004 India
| | - Anuj K. Jain
- Center for Advance Studies, Department of Chemistry; University of Rajasthan; Jaipur 302004 India
| | - Sonam Sharma
- Center for Advance Studies, Department of Chemistry; University of Rajasthan; Jaipur 302004 India
| | - Ruby Singh
- Center for Advance Studies, Department of Chemistry; University of Rajasthan; Jaipur 302004 India
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48
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Tamaddon F, Azadi D. Synthesis and identification of nicotinium sulfate (3-(1-methylpyrrolidin-2-yl)pyridine:H 2 SO 4 ) from tobacco-extracted nicotine: A protic ionic liquid and biocompatible catalyst for selective acetylation of amines. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.107] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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49
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Mbakidi JP, Bouquillon S. Glycerol-based ionic liquids: Crucial microwaves-assisted synthetic step for solketal amines. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.102] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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50
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Hawker RR, Haines RS, Harper JB. The effect of varying the anion of an ionic liquid on the solvent effects on a nucleophilic aromatic substitution reaction. Org Biomol Chem 2018; 16:3453-3463. [DOI: 10.1039/c8ob00651b] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Variety of ionic liquids with different anions used as solvents for a nucleophilic aromatic substitution reaction.
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Affiliation(s)
| | | | - Jason B. Harper
- School of Chemistry
- University of New South Wales
- Sydney
- Australia
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