A new air-stable zinc complex based on a 1,2-phenylene-diimino-2-cyanoacrylate ligand as an efficient catalyst of the epoxide–CO2coupling

2014 ◽  
Vol 43 (6) ◽  
pp. 2344-2347 ◽  
Author(s):  
M. A. Fuchs ◽  
S. Staudt ◽  
C. Altesleben ◽  
O. Walter ◽  
T. A. Zevaco ◽  
...  
Keyword(s):  
Zinc Complex ◽  
Efficient Catalyst

Fluoro-functionalized polymeric N-heterocyclic carbene-zinc complexes: efficient catalyst for formylation and methylation of amines with CO2 as a C1-building block

RSC Advances ◽  
2015 ◽  
Vol 5 (25) ◽  
pp. 19613-19619 ◽  
Author(s):  
Zhen-Zhen Yang ◽  
Bo Yu ◽  
Hongye Zhang ◽  
Yanfei Zhao ◽  
Guipeng Ji ◽  
...  
Keyword(s):  
Building Block ◽  
Zinc Complex ◽  
Zinc Complexes ◽  
Efficient Catalyst

A heterogeneous fluoro-functionalized polymeric N-heterocyclic carbene-zinc complex (F-PNHC-Zn) was designed and prepared for the formylation and methylation of N-methylanilines using CO2 as a C1 building block in the presence of organosilane.

scholarly journals Novel polystyrene-anchored zinc complex: Efficient catalyst for phenol oxidation

2014 ◽  
Vol 35 (10) ◽  
pp. 1701-1708 ◽  
Author(s):  
Alekha Kumar Sutar ◽  
Yasobanta Das ◽  
Sasmita Pattnaik ◽  
Anita Routaray ◽  
Nibedita Nath ◽  
...  
Keyword(s):  
Zinc Complex ◽  
Phenol Oxidation ◽  
Efficient Catalyst

Preparation and Characterization of a Novel Room Temperature Dicationic Ionic Liquid and its Application in the Synthesis of Xanthenediones Under Solvent-Free Conditions

2018 ◽  
Vol 21 (8) ◽  
pp. 602-608 ◽  
Author(s):  
Zainab Ehsani-Nasab ◽  
Ali Ezabadi
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Reaction Times ◽  
Significant Loss ◽  
Solvent Free ◽  
Acidity Function ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Hammett Acidity Function ◽  
Dicationic Ionic Liquid

Aim and Objective: In the present work, 1, 1’-sulfinyldiethylammonium bis (hydrogen sulfate) as a novel room temperature dicationic ionic liquid was synthesized and used as a catalyst for xanthenediones synthesis. Material and Method: The dicationic ionic liquid has been synthesized using ethylamine and thionyl chloride as precursors. Then, by the reaction of [(EtNH2)2SO]Cl2 with H2SO4, [(EtNH2)2SO][HSO4]2 was prepared and after that, it was characterized by FT-IR, 1H NMR, 13C NMR as well as Hammett acidity function. This dicationic ionic liquid was used as a catalyst for the synthesis of xanthenediones via condensation of structurally diverse aldehydes and dimedone under solvent-free conditions. The progress of the reaction was monitored by thin layer chromatography (ethyl acetate/n-hexane = 3/7). Results: An efficient solvent-free method for the synthesis of xanthenediones has been developed in the presence of [(EtNH2)2SO][HSO4]2 as a powerful catalyst with high to excellent yields, and short reaction times. Additionally, recycling studies have demonstrated that the dicationic ionic liquid can be readily recovered and reused at least four times without significant loss of its catalytic activity. Conclusion: This new dicationic ionic liquid can act as a highly efficient catalyst for xanthenediones synthesis under solvent-free conditions.

Controlled Growth and Characterization Ag/ZnO Nanotetrapods for Humidity Sensing

2018 ◽  
Vol 21 (7) ◽  
pp. 462-467
Author(s):  
Babak Sadeghi
Keyword(s):  
Room Temperature ◽  
Zinc Complex ◽  
Water Solution ◽  
Particle Morphology ◽  
Quick Response ◽  
Separation System ◽  
Humidity Sensing ◽  
Sensor Material ◽  
Highly Sensitive

Aim and Objective: Ultrafine Ag/ZnO nanotetrapods (AZNTP) have been prepared successfully using silver (I)–bis (oxalato) zinc complex and 1, 3-diaminopropane (DAP) with a phase separation system, and have been injected into a diethyl/water solution. Materials and Methods: This crystal structure and lattice constant of the AZNTP obtained were investigated by means of a SEM, XRD, TEM and UV-vis spectrum. Results: The results of the present study demonstrated the growth and characterization AZNTP for humidity sensing and DAP plays a key role in the determination of particle morphology. AZNTP films with 23 nm in arm diameter have shown highly sensitive, quick response sensor material that works at room temperature.

Chiral Mn(III) Salen Complex Immobilized on CuFe2O4@SiO2-NH2 NPs: A Cheap and Efficient Catalyst for N-arylation of Aryl Halides and Phenylboronic Acid Under Mild Conditions

2020 ◽  
Vol 17 (11) ◽  
pp. 857-863
Author(s):  
Mohammad Ali Nasseri ◽  
Seyyedeh Ameneh Alavi ◽  
Milad Kazemnejadi ◽  
Ali Allahresani
Keyword(s):  
Phenylboronic Acid ◽  
Significant Loss ◽  
Aryl Halides ◽  
Coupling Reactions ◽  
Efficient Catalyst ◽  
Aryl Chlorides ◽  
Mild Conditions ◽  
Cross Coupling Reactions ◽  
Salen Complex ◽  
Ft Ir

A convenient and efficient chiral CuFe2O4@SiO2-Mn(III) Ch.salen nanocatalyst has been developed for the C-N cross-coupling reactions of aryl halides/ phenylboronic acid with N-heterocyclic compounds in water and/or DMSO under mild conditions. The catalyst could be applied for the N-arylation of a variety of nitrogen-containing heterocycles with aryl chlorides, bromides, iodides and phenylboronic acid under mild conditions. Moderate to good yields were achieved for all substrates. The structure of catalyst was characterized using various techniques including FT-IR, FE-SEM, EDX, XRD, TEM and TGA. The catalyst can be simply recovered and reused for several times without significant loss of activity.

Efficient Catalyst for Hydroarylation Reaction of Styrene with Phenol to Obtain High DSP Selectivity in Mild Condition

2018 ◽  
Vol 15 (2) ◽  
Author(s):  
Vicna Kim ◽  
Eun Ju Shin ◽  
Hogeun Ahn ◽  
Minchul Chung ◽  
Sunghun Jung ◽  
...  
Keyword(s):  
Mild Condition ◽  
Efficient Catalyst
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