Synergetic catalytic effect of ionic liquids and ZnO nanoparticles on the selective synthesis of 1,2-disubstituted benzimidazoles using a ball-milling technique

2015 ◽  
Vol 17 (8) ◽  
pp. 4263-4270 ◽  
Author(s):  
Hemant Sharma ◽  
Navneet Kaur ◽  
Narinder Singh ◽  
Doo Ok Jang
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ball Milling ◽  
Zno Nanoparticles ◽  
Catalytic Effect ◽  
Solvent Free ◽  
Selective Synthesis ◽  
Ball Milling Technique

A solvent-free selective synthesis of 1,2-disubstituted benzimidazoles was developed in the presence of recyclable ionic liquid-coated ZnO-nanoparticles using a ball-milling technique.

scholarly journals Rechargeable aluminum batteries: effects of cations in ionic liquid electrolytes

RSC Advances ◽  
2019 ◽  
Vol 9 (20) ◽  
pp. 11322-11330 ◽  
Author(s):  
Guanzhou Zhu ◽  
Michael Angell ◽  
Chun-Jern Pan ◽  
Meng-Chang Lin ◽  
Hui Chen ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Solvent Free ◽  
Room Temperature Ionic Liquids ◽  
Liquid Electrolytes

Room temperature ionic liquids (RTILs) are solvent-free liquids comprised of densely packed cations and anions. Properties of Py13Cl–AlCl3 ILs were studied and compared with EMIC-AlCl3 ILs for use as electrolyte in Al–graphite battery.

scholarly journals Access to cross-linked chitosans by exploiting CO2 and the double solvent-catalytic effect of ionic liquids

2017 ◽  
Vol 19 (5) ◽  
pp. 1235-1239 ◽  
Author(s):  
Andrea Mezzetta ◽  
Lorenzo Guazzelli ◽  
Cinzia Chiappe
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Catalytic Effect ◽  
Component System

Fist synthesis of ureido cross-linked chitosans employing the CO2–chitosan–ionic liquid three component system as a way to prepare new biomaterials.

A solvent-free protocol for the green synthesis of arylalkylidene rhodanines in a task-specific ionic liquid

2010 ◽  
Vol 88 (6) ◽  
pp. 514-518 ◽  
Author(s):  
Abdolhamid Alizadeh ◽  
Mohammad M. Khodaei ◽  
Ali Eshghi
Keyword(s):  
Ionic Liquid ◽  
Green Synthesis ◽  
Carbonyl Compounds ◽  
Catalytic Effect ◽  
Knoevenagel Condensation ◽  
Solvent Free ◽  
Detailed Mechanism ◽  
Solvent Free Conditions ◽  
First Time ◽  
Task Specific Ionic Liquid

2-Hydroxyethylammonium formate acts as a task-specific ionic liquid (TSIL) for the Knoevenagel condensation of carbonyl compounds with rhodanine to afford arylalkylidene rhodanines under solvent-free conditions and in good-to-excellent yields. Additionally, compared with those in organic solvents, the yields obtained in the presence of our ionic liquid (IL) were significantly increased. The detailed mechanism of the catalytic effect of TSIL is also reported for the first time.

scholarly journals Quinone Redox-active Ionic Liquids

2017 ◽  
Vol 59 (4) ◽  
Author(s):  
Andrew Patrick Doherty ◽  
Sean Patterson ◽  
Laura Diaconu Diaconu ◽  
Louise Graham ◽  
Rachid Barhdadi ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Solvent Free ◽  
Large Array ◽  
Transfer Processes ◽  
Redox Active ◽  
Electron Transfer Processes ◽  
Physical And Chemical

<p>Simple ionic liquids exhibit unique physical and chemical<br />properties that make them very useful for deployment in electrochemical<br />devices such as solvent-free electrolytes in capacitors and batteries.<br />However, incorporating redox functionality into ionic liquid<br />structures opens up in situ faradaic electrochemistry which allows access<br />to a large array of new electrochemical applications reliant upon<br />heterogeneous or homogenous electron-transfer processes. This paper<br />presents and discusses the opportunities and challenges for these types<br />of electro-materials across a myriad of applications by considering<br />exemplar quinone-functionalised ionic liquids.</p>

scholarly journals Efficient and Reusable Iron Catalyst to Convert CO2 into Valuable Cyclic Carbonates

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1089
Author(s):  
Ana P. C. Ribeiro ◽  
Peter Goodrich ◽  
Luísa M. D. R. S. Martins
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Catalytic Effect ◽  
Iron Catalyst ◽  
Cyclic Carbonate ◽  
Cyclic Carbonates ◽  
Mild Conditions ◽  
First Time

The production of cyclic carbonates from CO2 cycloaddition to epoxides, using the C-scorpionate iron(II) complex [FeCl2{κ3-HC(pz)3}] (pz = 1H-pyrazol-1-yl) as a catalyst, is achieved in excellent yields (up to 98%) in a tailor-made ionic liquid (IL) medium under mild conditions (80 °C; 1–8 bar). A favorable synergistic catalytic effect was found in the [FeCl2{κ3-HC(pz)3}]/IL system. Notably, in addition to exhibiting remarkable activity, the catalyst is stable during ten consecutive cycles, the first decrease (11%) on the cyclic carbonate yield being observed during the 11th cycle. The use of C-scorpionate complexes in ionic liquids to afford cyclic carbonates is presented herein for the first time.

scholarly journals Solvent-Free Mechanochemical Synthesis of ZnO Nanoparticles by High-Energy Ball Milling of ε-Zn(OH)2 Crystals

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 238
Author(s):  
Gil Otis ◽  
Michal Ejgenberg ◽  
Yitzhak Mastai
Keyword(s):  
Ball Milling ◽  
Mechanochemical Synthesis ◽  
Zno Nanoparticles ◽  
High Energy ◽  
Milling Process ◽  
Solvent Free ◽  
Synthetic Route ◽  
Ambient Conditions ◽  
Milling Duration ◽  
Energy Ball

A detailed investigation is presented for the solvent-free mechanochemical synthesis of zinc oxide nanoparticles from ε-Zn(OH)2 crystals by high-energy ball milling. Only a few works have ever explored the dry synthetic route from ε-Zn(OH)2 to ZnO. The milling process of ε-Zn(OH)2 was done in ambient conditions with a 1:100 powder/ball mass ratio, and it produced uniform ZnO nanoparticles with sizes of 10–30 nm, based on the milling duration. The process was carefully monitored and the effect of the milling duration on the powder composition, nanoparticle size and strain, optical properties, aggregate size, and material activity was examined using XRD, TEM, DLS, UV-Vis, and FTIR. The mechanism for the transformation of ε-Zn(OH)2 to ZnO was studied by TGA and XPS analysis. The study gave proof for a reaction mechanism starting with a phase transition of crystalline ε-Zn(OH)2 to amorphous Zn(OH)2, followed by decomposition to ZnO and water. To the best of our knowledge, this mechanochemical approach for synthesizing ZnO from ε-Zn(OH)2 is completely novel. ε-Zn(OH)2 crystals are very easy to obtain, and the milling process is done in ambient conditions; therefore, this work provides a simple, cheap, and solvent-free way to produce ZnO nanoparticles in dry conditions. We believe that this study could help to shed some light on the solvent-free transition from ε-Zn(OH)2 to ZnO and that it could offer a new synthetic route for synthesizing ZnO nanoparticles.

Cholinium ionic liquids as cheap and reusable catalysts for the synthesis of coumarins via Pechmann reaction under solvent-free conditions

RSC Advances ◽  
2014 ◽  
Vol 4 (44) ◽  
pp. 22946-22950 ◽  
Author(s):  
Yuehua Zhang ◽  
Anlian Zhu ◽  
Qianqian Li ◽  
Lingjun Li ◽  
Yang Zhao ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ethyl Acetoacetate ◽  
Catalytic Performance ◽  
Solvent Free ◽  
Reusable Catalyst ◽  
Pechmann Reaction ◽  
Solvent Free Conditions

Ionic liquid [N112OH][HSO4] was found to be an efficient and reusable catalyst for Pechmann reaction under solvent-free conditions. UV-vis studies suggested that the high catalytic performance of this catalyst was mainly due to its ability to increase the content of keto tautomer of ethyl acetoacetate.

Reactive behavior of isoquinoline alkaloid in a green reduction process assisted by ionic liquids and solvent-free techniques

2021 ◽  
Vol 6 (1) ◽  
pp. 67-73
Author(s):  
Jie Tang ◽  
Sara Toufouki ◽  
Alula Yohannes ◽  
Shun Yao
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Reduction Process ◽  
Isoquinoline Alkaloid ◽  
Solvent Free ◽  
Reactive Behavior ◽  
First Time

Green reduction was assisted by ionic liquid and solvent-free technologies and a reaction in a tablet was realized for the first time.

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