INANOTECH Institute of Nanomaterials and Nanotechnology

Rabat, Morocco

INANOTECH Institute of Nanomaterials and Nanotechnology

Rabat, Morocco

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Bassoude I.,CNRS Institute of Organic and Analytical Chemistry | Berteina-Raboin S.,CNRS Institute of Organic and Analytical Chemistry | Massip S.,University of Bordeaux Segalen | Leger J.-M.,University of Bordeaux Segalen | And 4 more authors.
European Journal of Organic Chemistry | Year: 2012

The palladium-catalyzed direct C-H arylation of various heterocyclic is now recognized to be the most effective methodology for making aromatic compounds. In this paper, we present a new approach to control the site-selective direct C-H arylation of both sp 2 and sp 3 sites in 5,7-dimethyl-2-phenylpyrazolo[1,5-a]pyrimidine by using aryl bromides. The desired compounds were obtained in satisfactory yields. The effects of each reaction parameter including catalyst, base, and solvent were investigated. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


El Kadib A.,INANOTECH Institute of Nanomaterials and Nanotechnology | Katir N.,INANOTECH Institute of Nanomaterials and Nanotechnology | Katir N.,CNRS Coordination Chemistry | Bousmina M.,INANOTECH Institute of Nanomaterials and Nanotechnology | And 3 more authors.
New Journal of Chemistry | Year: 2012

Dendrimers and silica inorganic materials are two effective building blocks that have attracted growing interest in both fundamental and applied material chemistry. The fruitful association of these soft and hard skeletons resulted in an unlimited library of materials and nanodevices with different tailored properties. The aim of this review is to shed light on different strategies of combination of dendrimer-silica materials. Special attention has been accorded to the porosity control and the accessibility of the functional groups of these organic-inorganic hybrid mesoporous materials. © 2012 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.


Kadib A.E.,INANOTECH Institute of Nanomaterials and Nanotechnology | Bousmina M.,Euro-Mediterranean University | Bousmina M.,Hassan II Academy of Science and Technology | Brunel D.,Charles Gerhardt Institute
Journal of Nanoscience and Nanotechnology | Year: 2014

Polysaccharides are a new class of pervasive biopolymers that display many advantages including wide availability, sustainability, inherent inclusion of chemical functionality, biocompatibility and biodegradability. Current efforts are focused on the catalytic transformation of these macromolecules into fuels and platform chemicals. However, there is growing interest in using biopolymers directly to create functional materials. Particularly, the ability of some polysaccharides to form physical and chemical porous hydrogels has opened new avenues for material synthesis and has been the driving force for rethinking the strategies used to create value-added nanomaterials from naturally available biomass. Among them, chitosan is on the rise due to the presence of amino groups on the polymer backbone that distinguishes it as a unique natural cationic polymer. This contribution sheds light on the opportunities offered by engineering the secondary structure of chitosan fibrillar hydrogels. The optimization and stabilization of the open framework structure of these soft-materials are crucial to designing novel functional hybrid materials, dispersed chitosan-metal nanoparticles and hierarchical porous inorganic materials. Copyright © 2014 American Scientific Publishers All rights reserved.


Qaiss A.,Laval University | Bousmina M.,Laval University | Bousmina M.,INANOTECH Institute of Nanomaterials and Nanotechnology | Bousmina M.,Hassan II Academy of Science and Technology
Polymer Engineering and Science | Year: 2011

A novel versatile biaxial stretching module that can be adapted to any uniaxial traction testing machine was developed to generate consecutive or simultaneous two-directional biaxial stretching at various stretching ratios and draw rates. The module allows direct conversion of the uniaxial machine displacement to transverse displacement with a precise adjustment of the stretch ratio between the transverse of the longitudinal strains. Additionally, the developed device allows simultaneous measurements of films mechanical properties in the two directions. The efficiency and the accuracy of the module were verified without and with standard polymer films such as polypropylene and high density polyethylene. Copyright © 2009 Society of Plastics Engineers.


Ennajih H.,INANOTECH Institute of Nanomaterials and Nanotechnology | Ennajih H.,Mohammed V University | Bouhfid R.,INANOTECH Institute of Nanomaterials and Nanotechnology | Essassi E.M.,INANOTECH Institute of Nanomaterials and Nanotechnology | And 4 more authors.
Microporous and Mesoporous Materials | Year: 2012

Natural and biocompatible porous hybrid microspheres have been prepared by gelation of an intercalated "chitosan-montmorillonite" solution followed by drying with super-critical CO 2. This drying method allowed generating an open framework of fibrillar chitosan-montmorillonite in which chitosan is petrified by the clay platelets. Monitoring the formation of the dispersed colloidal beads microspheres by wide angle X-ray diffraction analysis evidenced the ingress (in acidic solution) and the egress (in basic solution) of chitosan scaffold within and from the montmorillonite galleries. Consistently with their high surface areas and enhanced accessibility, aerogel microspheres are found to be three times superior to their xerogel version in terms of methylene blue uptake. The presented hybrid materials take advantages from the chemical reactivity of chitosan backbone and the higher stability of clay platelets and pave the way toward positive synergetic effects. © 2011 Elsevier Inc. All rights reserved.


Solhy A.,INANOTECH Institute of Nanomaterials and Nanotechnology | Elmakssoudi A.,Hassan II University | Tahir R.,Hassan II University | Karkouri M.,Hassan II University | And 5 more authors.
Green Chemistry | Year: 2010

A versatile, alternative and environmentally benign three-component strategy to the synthesis of a series of 2-amino-chromenes has been successfully performed in water, using nanostructured diphosphate Na2CaP 2O7 (DIPH) as a basic catalyst. The products are obtained in high recoveries from the one-pot multi-component reaction procedure involving carbonyl compounds, malononitrile and 1-naphtol, resulting in a green synthetic protocol with high atom economy. The catalyst is waste-free, easily prepared, and efficiently re-used. The prepared 2-amino-chromenes, in presence of acetic anhydride, have been easily converted to benzo(a)anthracene derivatives. © 2010 The Royal Society of Chemistry.


Reyna-Valencia A.,Laval University | Deyrail Y.,Laval University | Bousmina M.,Laval University | Bousmina M.,INANOTECH Institute of Nanomaterials and Nanotechnology | Bousmina M.,Hassan II Academy of Science and Technology
Macromolecules | Year: 2010

This work deals with the follow-up of structure evolution in clay-polymer nanocomposites during the intercalation process through in situ analyses combining X-ray diffraction and rheology using a home-modified X-ray diffraction setup coupled with a rheometer with a special shearing cell developed for this work. To avoid any interference of medium elasticity, the selected matrix was a bisphenol A-based epoxy resin DGEBA with a Newtonian behavior under the examined experimental conditions. The selected clay was an organophilic montmorillonite (Cloisite 30B). The evolution of clay stacks in the clay-polymer nanocomposites was assessed under quiescent conditions by simultaneous time-resolved X-ray diffraction (XRD) and rheometry. The main results showed a very slow polymer diffusion process that increases the concentration of the intercalated stacks, narrows their distribution, and decreases the number of lamellae per stack. © 2009 American Chemical Society.


Caminade A.-M.,CNRS Coordination Chemistry | Laurent R.,CNRS Coordination Chemistry | Delavaux-Nicot B.,CNRS Coordination Chemistry | Majoral J.-P.,CNRS Coordination Chemistry | Majoral J.-P.,INANOTECH Institute of Nanomaterials and Nanotechnology
New Journal of Chemistry | Year: 2012

"Janus" dendrimers, i.e. dendrimers constituted of two dendrimeric wedges and terminated by two different functionalities, are reviewed. Both the synthetic aspects and the particular properties afforded by the presence of two different functions in two precise areas of the surface of the Janus dendrimers are reported. This review is organized depending on the type of internal structure (benzyl ether, phenylene, phosphorus, PAMAM, DAB, lysine, alkyl ether, ester, amide, etc.). © 2012 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.


Kadib A.E.,INANOTECH Institute of Nanomaterials and Nanotechnology | Molvinger K.,Charles Gerhardt Institute | Cacciaguerra T.,Charles Gerhardt Institute | Bousmina M.,INANOTECH Institute of Nanomaterials and Nanotechnology | Brunel D.,Charles Gerhardt Institute
Microporous and Mesoporous Materials | Year: 2011

This work describes a versatile strategy for fabricating highly porous and nanofibrous titania, zirconia, alumina and tin oxide. Taking advantage from chitosan polysaccharide microspheres as nano-assembling system during sol-gel mineralization of monomeric alkoxides and the beneficial effect of supercritical CO2 drying to avoid the collapse of the transient hybrid material network, all targeted metal oxides were created, after calcinations, as fibrous filaments featuring dual meso- and macro-porous network with surface areas ranging from 110 to 310 m2g-1. Chitosan alcogels were found to be the best mould for this replication alleviating the problems associated with the rapid kinetic growth encountered with hydrogels and those of diffusion limitations in dried aerogels. From mechanistic point of view, amino-metal coordination NH2 → M (M = Ti, Zr, Al, Sn) and hydrogen bonding between hydroxyl group and oligomeric metal oxide play a pivotal role during the mineralization process. © 2010 Elsevier Inc.


El Kadib A.,INANOTECH Institute of Nanomaterials and Nanotechnology | Bousmina M.,Hassan II Academy for Science and Technology
Chemistry - A European Journal | Year: 2012

Recently, organic-inorganic hybrid materials have attracted tremendous attention thanks to their outstanding properties, their efficiency, versatility and their promising applications in a broad range of areas at the interface of chemistry and biology. This article deals with a new family of surface-reactive organic-inorganic hybrid materials built from chitosan microspheres. The gelation of chitosan (a renewable amino carbohydrate obtained by deacetylation of chitin) by pH inversion affords highly dispersed fibrillar networks shaped as self-standing microspheres. Nanocasting of sol-gel processable monomeric alkoxides inside these natural hydrocolloids and their subsequent CO 2 supercritical drying provide high-surface-area organic-inorganic hybrid materials. Examples including chitosan-SiO 2, chitosan-TiO 2, chitosan-redox-clusters and chitosan-clay-aerogel microspheres are described and discussed on the basis of their textural and structural properties, thermal and chemical stability and their performance in catalysis and adsorption. Gelling together: Gelation of a chitosan biopolymers by pH inversion affords highly dispersed self-standing microspheres (see figure). Nanocasting and nanoreplication by sol-gel chemistry and/or intercalation by ion exchange provide a new family of surface-reactive organic-inorganic hybrid materials. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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