Dr. Vivek Polshettiwar

Publications

• 4.77

  Impact points

  Nanoroses of Nickel Oxides: Synthesis, Electron Tomography Study, and Application in CO Oxidation and Energy Storage.

  Aziz Fihri, Rachid Sougrat, Raghavan Baby Rakhi, Raed Rahal, Dongkyu Cha, Mohamed Nejib Hedhili, Mohamed Bouhrara, Husam N Alshareef, Vivek Polshettiwar

  ChemSusChem. 04/2012;

  Nickel oxide and mixed-metal oxide structures were fabricated by using microwave irradiation in pure water. The nickel oxide self-assembled into unique rose-shaped nanostructures. These nickel oxide roses were studied by performing electron tomography with virtual cross-sections through the particle... [more] Nickel oxide and mixed-metal oxide structures were fabricated by using microwave irradiation in pure water. The nickel oxide self-assembled into unique rose-shaped nanostructures. These nickel oxide roses were studied by performing electron tomography with virtual cross-sections through the particles to understand their morphology from their interior to their surface. These materials exhibited promising performance as nanocatalysts for CO oxidation and in energy storage devices.
• 4.77

  Impact points

  Nanoscience makes catalysis greener.

  Vivek Polshettiwar, Jean-Marie Basset, Didier Astruc

  ChemSusChem. 01/2012; 5(1):6-8.
• 4.77

  Impact points

  Fibrous nano-silica (KCC-1)-supported palladium catalyst: Suzuki coupling reactions under sustainable conditions.

  Aziz Fihri, Dongkyu Cha, Mohamed Bouhrara, Noor Almana, Vivek Polshettiwar

  ChemSusChem. 11/2011; 5(1):85-9.
• 20.09

  Impact points

  Nanocatalysts for Suzuki cross-coupling reactions.

  Aziz Fihri, Mohamed Bouhrara, Bijan Nekoueishahraki, Jean-Marie Basset, Vivek Polshettiwar

  Chemical Society reviews. 08/2011; 40(10):5181-203.

  This critical review deals with the applications of nanocatalysts in Suzuki coupling reactions, a field that has attracted immense interest in the chemical, materials and industrial communities. We intend to present a broad overview of nanocatalysts for Suzuki coupling reactions with an emphasis on ... [more] This critical review deals with the applications of nanocatalysts in Suzuki coupling reactions, a field that has attracted immense interest in the chemical, materials and industrial communities. We intend to present a broad overview of nanocatalysts for Suzuki coupling reactions with an emphasis on their performance, stability and reusability. We begin the review with a discussion on the importance of Suzuki cross-coupling reactions, and we then discuss fundamental aspects of nanocatalysis, such as the effects of catalyst size and shape. Next, we turn to the core focus of this review: the synthesis, advantages and disadvantages of nanocatalysts for Suzuki coupling reactions. We begin with various nanocatalysts that are based on conventional supports, such as high surface silica, carbon nanotubes, polymers, metal oxides and double hydroxides. Thereafter, we reviewed nanocatalysts based on non-conventional supports, such as dendrimers, cyclodextrin and magnetic nanomaterials. Finally, we discuss nanocatalyst systems that are based on non-conventional media, i.e., fluorous media and ionic liquids, for use in Suzuki reactions. At the end of this review, we summarise the significance of nanocatalysts, their impacts on conventional catalysis and perspectives for further developments of Suzuki cross-coupling reactions (131 references).
• 11.83

  Impact points

  "Hydro-metathesis" of olefins: a catalytic reaction using a bifunctional single-site tantalum hydride catalyst supported on fibrous silica (KCC-1) Nanospheres.

  Vivek Polshettiwar, Jean Thivolle-Cazat, Mostafa Taoufik, Francois Stoffelbach, Sebastien Norsic, Jean-Marie Basset

  Angewandte Chemie (International ed. in English). 03/2011; 50(12):2747-51.
• 35.96

  Impact points

  Magnetically recoverable nanocatalysts.

  Vivek Polshettiwar, Rafael Luque, Aziz Fihri, Haibo Zhu, Mohamed Bouhrara, Jean-Marie Basset

  Chemical reviews. 03/2011; 111(5):3036-75.
• 4.08

  Impact points

  Suzuki-Miyaura cross-coupling coupling reactions with low catalyst loading: a green and sustainable protocol in pure water.

  Aziz Fihri, Denis Luart, Christophe Len, Abderrahim Solhy, Carole Chevrin, Vivek Polshettiwar

  Dalton transactions (Cambridge, England : 2003). 02/2011; 40(13):3116-21.

  The Suzuki-Miyaura coupling reaction represents one of the most important synthetic transformations developed in the 20th century. However, the use of toxic organic solvents remains a scientific challenge and an aspect of economical and ecological relevance, and benign water as a reaction medium was... [more] The Suzuki-Miyaura coupling reaction represents one of the most important synthetic transformations developed in the 20th century. However, the use of toxic organic solvents remains a scientific challenge and an aspect of economical and ecological relevance, and benign water as a reaction medium was found to be highly effective to overcome some of these issues. In the present manuscript, we described Suzuki-Miyaura coupling reactions in neat water, without using any phase transfer reagent. Notably, this protocol also works with ultra-low loading of catalyst with high turnover numbers and also able to couple challenging substrates like aryl chlorides.
• 4.77

  Impact points

  Chemistry by Nanocatalysis: First example of a solid-supported RAPTA complex for organic reactions in aqueous medium.

  Sergio E García-Garrido, Javier Francos, Victorio Cadierno, Jean-Marie Basset, Vivek Polshettiwar

  ChemSusChem. 01/2011; 4(1):104-11.

  A ruthenium-arene-PTA (RAPTA) complex has been supported for the first time on an inorganic solid, that is, silica-coated ferrite nanoparticles. The resulting magnetic material proved to be a general, very efficient and easily reusable catalyst for three synthetically useful organic transformations;... [more] A ruthenium-arene-PTA (RAPTA) complex has been supported for the first time on an inorganic solid, that is, silica-coated ferrite nanoparticles. The resulting magnetic material proved to be a general, very efficient and easily reusable catalyst for three synthetically useful organic transformations; selective nitrile hydration, redox isomerization of allylic alcohols, and heteroannulation of (Z)-enynols. The use of low metal concentration, environmentally friendly water as a reaction medium, with no use at all of organic solvent during or after the reactions, and microwaves as an alternative energy source renders the synthetic processes reported herein "truly" green and sustainable.
• 11.83

  Impact points

  High-surface-area silica nanospheres (KCC-1) with a fibrous morphology.

  Vivek Polshettiwar, Dongkyu Cha, Xixiang Zhang, Jean Marie Basset

  Angewandte Chemie (International ed. in English). 12/2010; 49(50):9652-6.
• 11.83

  Impact points

  High-Surface-Area Silica Nanospheres (KCC-1) with a Fibrous Morphology.

  Vivek Polshettiwar, Dongkyu Cha, Xixiang Zhang, Jean-Marie Basset

  Angewandte Chemie (International ed. in English). 09/2010;
• 4.77

  Impact points

  Suzuki-Miyaura cross-coupling reactions in aqueous media: green and sustainable syntheses of biaryls.

  Vivek Polshettiwar, Audrey Decottignies, Christophe Len, Aziz Fihri

  ChemSusChem. 02/2010; 3(5):502-22.

  Carbon-carbon cross-coupling reactions are among the most important processes in organic chemistry, and Suzuki-Miyaura reactions are among the most widely used protocols for the formation of carbon-carbon bonds. These reactions are generally catalyzed by soluble palladium complexes with various liga... [more] Carbon-carbon cross-coupling reactions are among the most important processes in organic chemistry, and Suzuki-Miyaura reactions are among the most widely used protocols for the formation of carbon-carbon bonds. These reactions are generally catalyzed by soluble palladium complexes with various ligands. However, the use of toxic organic solvents remains a scientific challenge and an aspect of economical and ecological relevance. This Review will summarize various recently developed significant methods by which the Suzuki-Miyaura coupling was conducted in aqueous media, and analyzes if they are "real green" protocols.
• 5.50

  Impact points

  Magnetic nanoparticle-supported glutathione: a conceptually sustainable organocatalyst.

  Vivek Polshettiwar, Babita Baruwati, Rajender S Varma

  Chemical communications (Cambridge, England). 05/2009;

  A conceptually novel nanoparticle-supported and magnetically recoverable organocatalyst has been developed, which is readily prepared from inexpensive starting materials in a truly sustainable manner; which catalyzes the Paal-Knorr reaction with high yield in pure aqueous medium that avoids the use ... [more] A conceptually novel nanoparticle-supported and magnetically recoverable organocatalyst has been developed, which is readily prepared from inexpensive starting materials in a truly sustainable manner; which catalyzes the Paal-Knorr reaction with high yield in pure aqueous medium that avoids the use of toxic organic solvents, even in the workup step.
• 7.49

  Impact points

  Self-Assembly of Metal Oxides into Three-Dimensional Nanostructures: Synthesis and Application in Catalysis.

  Vivek Polshettiwar, Babita Baruwati, Rajender S Varma

  ACS nano. 03/2009;

  Nanostructured metal (Fe, Co, Mn, Cr, Mo) oxides were fabricated under microwave irradiation conditions in pure water without using any reducing or capping reagent. The metal oxides self-assembled into octahedra, spheres, triangular rods, pine, and hexagonal snowflake-like three-dimensional morpholo... [more] Nanostructured metal (Fe, Co, Mn, Cr, Mo) oxides were fabricated under microwave irradiation conditions in pure water without using any reducing or capping reagent. The metal oxides self-assembled into octahedra, spheres, triangular rods, pine, and hexagonal snowflake-like three-dimensional morphologies. Pine-structured nano-iron oxides were studied as a novel support for various catalytic organic transformations.
• 3.76

  Impact points

  Nanoparticle-supported and magnetically recoverable palladium (Pd) catalyst: a selective and sustainable oxidation protocol with high turnover number.

  Vivek Polshettiwar, Rajender S Varma

  Organic & biomolecular chemistry. 02/2009; 7(1):37-40.

  A magnetic nanoparticle-supported Pd catalyst was readily prepared from inexpensive starting materials and shown to catalyze various oxidation reactions with high turnover number (TON) and excellent selectivity. The ease of recovery using an external magnetic field, high activity, and the intrinsic ... [more] A magnetic nanoparticle-supported Pd catalyst was readily prepared from inexpensive starting materials and shown to catalyze various oxidation reactions with high turnover number (TON) and excellent selectivity. The ease of recovery using an external magnetic field, high activity, and the intrinsic stability of the catalyst make this protocol economic and sustainable.
• 5.38

  Impact points

  Nanoparticle-Supported and Magnetically Recoverable Ruthenium Hydroxide Catalyst: Efficient Hydration of Nitriles to Amides in Aqueous Medium.

  Vivek Polshettiwar, Rajender S Varma

  Chemistry (Weinheim an der Bergstrasse, Germany). 02/2009;
• 5.50

  Impact points

  The synthesis and applications of a micro-pine-structured nanocatalyst.

  Vivek Polshettiwar, Mallikarjuna N Nadagouda, Rajender S Varma

  Chemical communications (Cambridge, England). 01/2009;

  Dendritic nanoferrites with a micro-pine morphology have been synthesized for the first time under microwave irradiation conditions without using any reducing or capping reagent; the nanoferrites were then functionalized and coated with Pd metal, which catalyzes various organic transformations.... [more] Dendritic nanoferrites with a micro-pine morphology have been synthesized for the first time under microwave irradiation conditions without using any reducing or capping reagent; the nanoferrites were then functionalized and coated with Pd metal, which catalyzes various organic transformations.

• Self-assembly of metal oxides into 3D nano-structures: Synthesis and nano-catalysis.

  Vivek Polshettiwar, Babita Baruwati, R. S. Varma

  ACS Nano. 01/2009;

• Alternative heating for green synthesis in water (Photo, Ultrasound, and Microwave).

  Vivek Polshettiwar, R. S. Varma

  01/2009;

• Self-assembly of palladium (Pd) nanoparticles: Synthesis of Pd nanobelts, nanoplates and nanotrees using vitamin B1 and their application in carbon-carbon coupling reactions

  M. N. Nadaguada, Vivek Polshettiwar, R. S. Varma

  J. Mat. Chem. 01/2009;

• Magnetically recoverable supported ruthenium catalyst for hydrogenation of alkynes and transfer hydrogenation of carbonyl compounds.

  Babita Baruwati, Vivek Polshettiwar, R. S. Varma

  Tetrahedron Lett. 01/2009;