scholarly journals Colloidal nickel/gallium nanoalloys obtained from organometallic precursors in conventional organic solvents and in ionic liquids: noble-metal-free alkyne semihydrogenation catalysts

Nanoscale ◽  
2014 ◽  
Vol 6 (10) ◽  
pp. 5532-5544 ◽  
Author(s):  
Kai Schütte ◽  
Adinarayana Doddi ◽  
Clarissa Kroll ◽  
Hajo Meyer ◽  
Christian Wiktor ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Organic Solvents ◽  
Noble Metal ◽  
Recyclable Catalyst ◽  
Metal Free ◽  
Organometallic Precursors

The Hume-Rothery phase NiGa as nanoparticles in an ionic liquid is a recyclable catalyst for selective semihydrogenation with yields of about 90% and selectivities of up to 94%.

Transition-metal-free borylation of propargylic alcohols: structurally variable synthesis in ionic liquid medium

2019 ◽  
Vol 6 (11) ◽  
pp. 1895-1899 ◽  
Author(s):  
Sangepu Bhavanarushi ◽  
Yin Xu ◽  
Imran Khan ◽  
Zhibin Luo ◽  
Bin Liu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Transition Metal ◽  
Liquid Medium ◽  
Propargylic Alcohols ◽  
Metal Free ◽  
Ionic Liquid Medium

Transition-metal-free borylation of unactivated propargylic alcohols in basic ionic liquids allowed the construction of various highly functionalized vinylboronates.

Noble-Metal-Free Electrocatalysts with Enhanced ORR Performance by Task-Specific Functionalization of Carbon using Ionic Liquid Precursor Systems

2014 ◽  
Vol 136 (41) ◽  
pp. 14486-14497 ◽  
Author(s):  
Nastaran Ranjbar Sahraie ◽  
Jens Peter Paraknowitsch ◽  
Caren Göbel ◽  
Arne Thomas ◽  
Peter Strasser
Keyword(s):  
Ionic Liquid ◽  
Noble Metal ◽  
Liquid Precursor ◽  
Metal Free

Heterogenization of amine-functionalized ionic liquids using graphene oxide as a support material: a highly efficient catalyst for the synthesis of 3-substituted indoles via Yonemitsu-type reaction

2017 ◽  
Vol 41 (24) ◽  
pp. 15545-15554 ◽  
Author(s):  
Charu Garkoti ◽  
Javaid Shabir ◽  
Padmini Gupta ◽  
Manisha Sharma ◽  
Subho Mozumdar
Keyword(s):  
Ionic Liquid ◽  
Graphene Oxide ◽  
Ionic Liquids ◽  
Recyclable Catalyst ◽  
Support Material ◽  
Efficient Catalyst ◽  
Functionalized Ionic Liquid ◽  
Type Reaction ◽  
Highly Efficient ◽  
Amine Functionalized

Heterogenization of amine functionalized ionic liquid and its application as an efficient and recyclable catalyst.

Ionic liquid [OMIm][OAc] directly inducing oxidation cleavage of the β-O-4 bond of lignin model compounds

2017 ◽  
Vol 53 (63) ◽  
pp. 8850-8853 ◽  
Author(s):  
Yingying Yang ◽  
Honglei Fan ◽  
Qinglei Meng ◽  
Zhaofu Zhang ◽  
Guanying Yang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Aromatic Compounds ◽  
Aerobic Oxidation ◽  
Model Compounds ◽  
Lignin Model Compounds ◽  
Metal Free ◽  
Lignin Model

Ionic liquids can effectively induce the transformation of lignin model compounds into aromatic compounds by aerobic oxidation under metal-free conditions.

Ionic Liquid Promoted Eco-friendly and Efficient Synthesis of Six-membered Npolyheterocycles

2018 ◽  
Vol 15 (8) ◽  
pp. 1124-1146 ◽  
Author(s):  
Navjeet Kaur
Keyword(s):  
Organic Chemistry ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Organic Solvents ◽  
Review Article ◽  
Environmentally Benign ◽  
Wide Range ◽  
Catalyzed Reactions ◽  
Metal Catalyzed ◽  
Reaction Media

Background: The synthesis of N-polyheterocycles by environmentally benign method is highly attractive but challenging proposition. New strategies have been developed for the preparation of polycyclic heterocycles in the last decades. In this review article, the synthesis of nitrogen containing six-membered polycyclic heterocyclic compounds is presented with the application of ionic liquids. This contribution focuses on the literature related to the total synthesis of six-membered N-polyheterocycles. Objective: Ionic liquids not only acted as environmentally benign reaction media but also as catalysts which afforded the very promising replacements of traditional molecular solvents in organic chemistry due to their stability, non-flammability, non-volatility and ease of recyclability. Ionic liquids are utilized in metal catalyzed reactions in place of organic solvents in the last years. It has attracted considerable attention in recent years. Ionic liquids acted as alternatives of organic solvents and these ILs are environment friendly. Conclusion: In the area of green chemistry ionic liquid assisted synthesis is a very promising technique which afforded a flexible platform for the formation of heterocycles. The influence of ILs on the development of efficient and new synthetic protocols over the last decade for the construction of N-polyheterocycles is featured in this review article. These synthetic strategies will continue to attract more attention and will find a wide range of applications in organic synthesis. In conclusion, ionic liquids assisted syntheses have become an efficient and powerful tool in organic chemistry quickly.

A Phosphine-mediated Synthesis of 2,3,4,5-tetra-substituted Nhydroxypyrroles from α-oximino Ketones and Dialkyl Acetylenedicarboxylates Under Ionic Liquid Green-media

2018 ◽  
Vol 21 (1) ◽  
pp. 14-18
Author(s):  
Ashraf S. Shahvelayati ◽  
Maryam Ghazvini ◽  
Khadijeh Yadollahzadeh ◽  
Akram S. Delbari
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Organic Solvents ◽  
Condensation Reaction ◽  
Reaction Medium ◽  
Sustainable Chemistry ◽  
Polyfunctional Compounds ◽  
High Yields ◽  
Work Up ◽  
Reaction Media

Background: The development of multicomponent reactions (MCRs) in the presence of task-specific ionic liquids (ILs), used not only as environmentally benign reaction media, but also as catalysts, is a new approach that meet with the requirements of sustainable chemistry. In recent years, the use of ionic liquids as a green media for organic synthesis has become a chief study area. This is due to their unique properties such as non-volatility, non-flammability, chemical and thermal stability, immiscibility with both organic compounds and water and recyclability. Ionic liquids are used as environmentally friendly solvents instead of hazardous organic solvents. Objective: We report the condensation reaction between α-oximinoketone and dialkyl acetylene dicarboxylate in the presence of triphenylphosphine to afford substituted pyrroles under ionic liquid conditions in good yields. Result: Densely functionalized pyrroles was easily prepared from reaction of α-oximinoketones, dialkyl acetylene dicarboxylate in the presence of triphenylphosphine in a quantitative yield under ionic liquid conditions at room temperature. Conclusion: In conclusion, ionic liquids are indicated as a useful and novel reaction medium for the selective synthesis of functionalized pyrroles. This reaction medium can replace the use of hazardous organic solvents. Easy work-up, synthesis of polyfunctional compounds, decreased reaction time, having easily available-recyclable ionic liquids, and good to high yields are advantages of present method.

scholarly journals Interaction of ionic liquids with noble metal surfaces: structure formation and stability of [OMIM][TFSA] and [EMIM][TFSA] on Au(111) and Ag(111)

2015 ◽  
Vol 17 (37) ◽  
pp. 23816-23832 ◽  
Author(s):  
Benedikt Uhl ◽  
Hsinhui Huang ◽  
Dorothea Alwast ◽  
Florian Buchner ◽  
R. Jürgen Behm
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Structure Formation ◽  
Noble Metal ◽  
Metal Surfaces

Principles of structure formation and adsorbate–adsorbate interactions in ionic liquid adlayers on metal surfaces were investigated in a comparative STM study on Ag(111) and Au(111) surfaces.

scholarly journals Electrospun Silk-Cellulose Composite Nanomaterials Using Ionic Liquid Regenerated Films

Proceedings ◽  
2020 ◽  
Vol 69 (1) ◽  
pp. 31
Author(s):  
Ashley Rivera-Galletti ◽  
Ye Xue ◽  
Stacy Love ◽  
David Salas de la Cruz ◽  
Xiao Hu
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Organic Solvents ◽  
Raw Materials ◽  
Composite Films ◽  
Structural Defects ◽  
Composite Nanomaterials ◽  
Cellulose Derivatives ◽  
Cellulose Content ◽  
Cellulose Nanomaterials

Electrospinning is a widely used technique to draw recalcitrant biopolymer solutions into micro to nanoscale materials in a simple and economical way. The first focus of this research involved using ionic liquids as a non-volatile solvent for natural insoluble biopolymers such as silk and cellulose (or cellulose derivatives). Compared to traditional organic solvents, ionic liquids can dissolve biopolymers without altering the molecular weight of the biopolymer. In this study, 1-ethyl-3-methylimidizolium acetate (EMIMAc) ionic liquid was used and the regenerated films were coagulated in baths of EtOH or water. The second focus of this research explored the dissolution of IL-regenerated composites into organic solvents and their electrospun composite nanomaterials. Various ratios of silk-cellulose bio-composite films regenerated from ionic liquids were used as the raw materials and sequentially dissolved/dispersed into a Formic Acid-CaCl2 solution in order to initiate the electrospinning of silk-cellulose nanomaterials. Because of the variability of ionic liquids, the nanomaterials produced using this technique have unique and tunable properties such as large surface area to volume ratios and low structural defects. FTIR and SEM results suggest that the structure and morphology of the final nanosized samples becomes more globular when the biopolymer composition ratio has increased cellulose content. TGA results demonstrated that the electrospun materials have better thermal stability than the original films. This two-step electrospinning method, using ionic liquid as a non-volatile solvent to first dissolve and mix raw natural materials, may lead to extensive research into its biomedical and pharmaceutical applications in the future.

Ionic Liquid Catalyzed Efficient Regioselective Synthesis of 1,4- Disubstituted 1,2,3-Triazoles under Metal and Solvent free Conditions

2020 ◽  
Vol 07 ◽  
Author(s):  
Abid H. Banday ◽  
Victor J. Hruby
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Solvent Free ◽  
Regioselective Synthesis ◽  
Chromatographic Separations ◽  
One Pot ◽  
Green Protocol ◽  
Metal Free ◽  
Organic Azides ◽  
Solvent Free Conditions

Background: Unprecedented, one-pot regioselective synthesis of 1,4-disubstituted 1,2,3-triazoles through azide- aldehyde (3+2) organo-click cycloaddition under metal and solvent-free conditions, is described. Objective: Solvent and metal free synthesis of biologically and industrially important triazoles. Methods: Efficient and high yielding synthesis of products avoiding the tedious high solvent workups and chromatographic separations. The synthesis doesn’t involve the routine acetylenes which are very costly but instead cheaper starting materials like aldehydes and organic azides are used. Results: Green protocol based on the catalysis through Ionic Liquids which simultaneously act as solvents. The products are obtained in good to excellent yields in hassle free synthesis. Conclusion: Efficient and green synthesis of structurally and biologically important triazoles.

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