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Silver and copper nanoparticles stabilized on ionic liquids-functionalized polyhedral oligomeric silsesquioxane (POSS): Highly active and recyclable hybrid catalysts
, Article Polyhedron ; Volume 171 , 2019 , Pages 228-236 ; 02775387 (ISSN) ; Naderahmadian, A ; Eftekhari Sis, B ; Sharif University of Technology
Elsevier Ltd
2019
Abstract
Two novel heterogeneous hybrid catalysts were successfully synthesized using octa-aminopropyl polyhedral oligomeric silsesquioxane hydrochloride salt (OA-POSS) and ionic liquids, followed by immobilization of Cu and Ag nanoparticles. The obtained hybrid catalysts, Cu@POSS-ILs and Ag@POSS-ILs, were characterized using FT-IR, SEM, EDX, TEM, XRD and TGA. Catalytic studies demonstrated that Cu@POSS-ILs was an excellent catalyst for click reaction in aqueous medium. Furthermore, Ag@POSS-ILs was also exhibited to be an active catalyst for 4-nitrophenol (4-NP) reduction. Simple preparation and easy catalysts recovery and recyclability of Cu@POSS-ILs and Ag@POSS-ILs for at least 3 and 6 runs,...
Immobilized copper(II) on nitrogen-rich polymer-entrapped Fe3O4 nanoparticles: A highly loaded and magnetically recoverable catalyst for aqueous click chemistry
, Article Applied Organometallic Chemistry ; Volume 30, Issue 2 , 2016 , Pages 73-80 ; 02682605 (ISSN) ; Hosseini, S. H ; Pour Javadi, A ; Bennett, C ; Sharif University of Technology
John Wiley and Sons Ltd
Abstract
A heterogeneous magnetic copper catalyst was prepared via anchoring of copper sulfate onto multi-layered poly(2-dimethylaminoethyl acrylamide)-coated magnetic nanoparticles and was characterized using various techniques. The catalyst was found to be active, effective and selective for one-pot three-component reaction of alkyl halide, sodium azide and alkyne, known as copper-catalyzed click synthesis of 1,2,3-triazoles. As little as 0.3 mol% of catalyst was found to be effective under the optimum conditions. The catalyst could also be recycled and reused up to seven times without significant loss of activity. Thermal stability, high loading level of copper on catalyst, broad diversity of...
Synthesis of 1,4-disubstituted 1,2,3-triazoles from aromatic α-bromoketones, sodium azide and terminal acetylenes via Cu/Cu(OTf)2-catalyzed click reaction under microwave irradiation
, Article Zeitschrift fur Naturforschung - Section C Journal of Biosciences ; Volume 68, Issue 4 , Apr , 2013 , Pages 391-396 ; 09395075 (ISSN) ; Oskooie, H. A ; Beheshtiha, Y. S ; Heravi, M. M ; Matloubi Moghaddam, F ; Koushki Foroushani, B ; Sharif University of Technology
2013
Abstract
Reaction of aromatic α-bromoketones, sodium azide and aromatic or aliphatic terminal acetylenes in the presence of Cu/Cu(OTf)2following the classical method (aqueous acetonitrile at room temperature) and under microwave irradiation (H2O at 85 °C) leads to 1,4-disubstituted 1,2,3-triazoles as the final products after simple filtration
SBA-15-supported Cu (II)/Schiff-base complex as an efficient and recyclable catalyst for one-pot azide-alkyne cycloaddition reaction
, Article Journal of Porous Materials ; Volume 26, Issue 5 , 2019 , Pages 1427-1433 ; 13802224 (ISSN) ; Nikbakht, F ; Ataie, S ; Sharif University of Technology
Springer New York LLC
2019
Abstract
A new complex of copper (II) was synthesized through the reaction of a Schiff-base, 4-(((2-hydroxyethyl)imino)methyl)phenol, with CuCl2·2H2O and, then, immobilization on SBA-15 support. Both immobilized and free copper complexes were characterized using different techniques such as FT-IR, elemental analysis (CHN), SEM, XRD and TEM, and were utilized as catalysts in one-pot azide-alkyne cycloaddition (AAC) reaction. Both catalysts showed high activity in conversion of various substrates to corresponding triazole compounds. The reaction was performed in water under mild condition and without any extra additives. The prepared catalyst was recovered and reused in 5 runs without any significant...
Copper immobilized onto polymer-coated magnetic nanoparticles as recoverable catalyst for 'click' reaction
, Article Applied Organometallic Chemistry ; 2016 ; 02682605 (ISSN) ; Bayat, A ; Valizadeh, H ; Sharif University of Technology
John Wiley and Sons Ltd
2016
Abstract
Copper supported on polymer-coated magnetic nanoparticles was designed and synthesized as a separable heterogeneous catalyst. The catalyst was fully characterized using several techniques such as Fourier transform infrared and energy-dispersive X-ray spectroscopies, scanning and transmission electron microscopies, X-ray diffraction, vibrating sample magnetometry, thermogravimetric analysis and inductively coupled plasma atomic emission spectrometry. All results showed that copper was successfully supported on the polymer-coated magnetic nanoparticles. Also, results showed that the synthesized material can be used as an efficient catalyst for the preparation of a series of 1,4-disubstituted...
Copper immobilized onto polymer-coated magnetic nanoparticles as recoverable catalyst for ‘click’ reaction
, Article Applied Organometallic Chemistry ; Volume 31, Issue 5 , 2017 ; 02682605 (ISSN) ; Bayat, A ; Valizadeh, H ; Sharif University of Technology
Abstract
Copper supported on polymer-coated magnetic nanoparticles was designed and synthesized as a separable heterogeneous catalyst. The catalyst was fully characterized using several techniques such as Fourier transform infrared and energy-dispersive X-ray spectroscopies, scanning and transmission electron microscopies, X-ray diffraction, vibrating sample magnetometry, thermogravimetric analysis and inductively coupled plasma atomic emission spectrometry. All results showed that copper was successfully supported on the polymer-coated magnetic nanoparticles. Also, results showed that the synthesized material can be used as an efficient catalyst for the preparation of a series of 1,4-disubstituted...