Sensitive electrochemical detection of methyl parathion in the presence of para-nitrophenol on a glassy carbon electrode modified by a functionalized NiAl-layered double hydroxide
Publication date: Available online 5 December 2018Source: Comptes Rendus ChimieAuthor(s): Aude P.W. Kameni, Hervé L. Tcheumi, Ignas K. Tonle, Emmanuel NgameniAbstractAn inorganic–organic composite material was prepared by the insertion of bis(ethylhexyl)hydrogen phosphate (BEHP) within the interlayer space of a nickel-aluminum–layered double hydroxide (NiAl LDH). X-ray diffraction, thermogravimetric analysis, and Fourier transform infrared were used to characterize the pristine and modified LDH (NiAl–BEHP), which together confirm the intercalation of BEHP in the mineral structure. Cyclic voltammetry using [Fe(CN)6]3...
Source: Comptes Rendus Chimie - December 6, 2018 Category: Chemistry Source Type: research
Mass transfer modelling in clay-based material: Estimation of apparent diffusivity of a molecule of interest
Publication date: Available online 1 December 2018Source: Comptes Rendus ChimieAuthor(s): Patrick Dutournié, Marion Bruneau, Jocelyne Brendlé, Lionel Limousy, Sylvain PluchonAbstractThis work is devoted to study the controlled release of a molecule of interest in an external medium. The molecule is previously adsorbed in an organic porous material, encapsulated in a thin clay layer. The experimental release kinetics is investigated for the organic material and the clay-based material in two external media: pure water and saline solution. A numerical modelling was developed to understand the different phenomena that act o...
Source: Comptes Rendus Chimie - December 2, 2018 Category: Chemistry Source Type: research
Ferromagnetic coupling through the oxalate bridge in heterobimetallic Cr(III)–M(II) (M = Mn and Co) assemblies
Publication date: Available online 23 November 2018Source: Comptes Rendus ChimieAuthor(s): Francisco R. Fortea-Pérez, Julia Vallejo, Jorge Pasán, Catalina Ruiz-Pérez, Joan Cano, Francesc Lloret, Miguel JulveAbstractTwo novel compounds, {[Cr(pyim)(ox)2]2Mn}n·2nCH3OH (1) and {[Cr(pyim)(ox)2]2Co(H2O)2}·7.5H2O (2) [pyim = 2-(2′-pyridyl)imidazole and H2ox = oxalic acid], were synthesized by using the mononuclear chromium(III) complex PPh4[Cr(pyim)(ox)2]·H2O (PPh4+ = tetraphenylphosphonium) as metalloligand towards the fully solvated manganese(II) (1) and cobalt(II) (2) ions as perchlorate salts. The structure of 1 cons...
Source: Comptes Rendus Chimie - November 24, 2018 Category: Chemistry Source Type: research
Editorial Board - French
Publication date: December 2018Source: Comptes Rendus Chimie, Volume 21, Issue 12Author(s): (Source: Comptes Rendus Chimie)
Source: Comptes Rendus Chimie - November 24, 2018 Category: Chemistry Source Type: research
Sommaire / Contents
Publication date: December 2018Source: Comptes Rendus Chimie, Volume 21, Issue 12Author(s): (Source: Comptes Rendus Chimie)
Source: Comptes Rendus Chimie - November 24, 2018 Category: Chemistry Source Type: research
In memoriam of Professor John J. McGarvey
Publication date: December 2018Source: Comptes Rendus Chimie, Volume 21, Issue 12Author(s): Azzedine Bousseksou, Gabor Molnár (Source: Comptes Rendus Chimie)
Source: Comptes Rendus Chimie - November 24, 2018 Category: Chemistry Source Type: research
Preface and introduction
Publication date: December 2018Source: Comptes Rendus Chimie, Volume 21, Issue 12Author(s): Jacqueline Zarembowitch, François Varret, Andreas Hauser, José-Antonio Real, Kamel Boukheddaden (Source: Comptes Rendus Chimie)
Source: Comptes Rendus Chimie - November 24, 2018 Category: Chemistry Source Type: research
Editorial Board - English
Publication date: December 2018Source: Comptes Rendus Chimie, Volume 21, Issue 12Author(s): (Source: Comptes Rendus Chimie)
Source: Comptes Rendus Chimie - November 24, 2018 Category: Chemistry Source Type: research
Removal of anionic dye from textile industries' effluents by using tunisian clays as adsorbents. Ζeta potential and streaming-induced potential measurements
Publication date: Available online 23 November 2018Source: Comptes Rendus ChimieAuthor(s): Nejib Abidi, Joëlle Duplay, Amane Jada, Emna Errais, Malika Ghazi, Khadija Semhi, Malika Trabelsi-AyadiAbstractIn the present work, we have investigated the adsorption capacities of natural raw clays originated from Tunisia, such as those from Tabarka (a mixture of kaolinite and illite) and from Fouchana (a mixture of smectite, kaolinite, and illite), a standard kaolinite (KGa-2), and a palygorskite (PFl-1) for the removal of a reactive red dye (RR 120) usually found in textile industry effluents. Thus, batch adsorption experiments ...
Source: Comptes Rendus Chimie - November 23, 2018 Category: Chemistry Source Type: research
Platinum nanoparticles–decorated graphene-modified glassy carbon electrode toward the electrochemical determination of ascorbic acid, dopamine, and paracetamol
Publication date: Available online 20 November 2018Source: Comptes Rendus ChimieAuthor(s): Manne Anupam Kumar, Vedagiri Lakshminarayanan, Sai Sathish RamamurthyAbstractIn the present study, we report the synthesis and characterization of platinum nanoparticles decorated graphene (GPtNPs) nanocomposite toward the electrochemical determination of ascorbic acid (AA), dopamine (DA), and paracetamol (PCT). GPtNPs demonstrated synergistic catalytic activity with enhanced currents in all of the measurements when compared with graphene-modified glassy carbon electrode (G-GCE) and bare GCE. The nanocomposite exhibited low overpoten...
Source: Comptes Rendus Chimie - November 21, 2018 Category: Chemistry Source Type: research
Development and physicochemical characterization of doxorubicin-encapsulated hydroxyapatite–polyvinyl alcohol nanocomposite for repair of osteosarcoma-affected bone tissues
In this study, a ceramic carrier like nanosized hydroxyapatite (HAp) was synthesized by the in situ precipitation method followed by coating with anticancer drug like doxorubicin (DOX) and polyvinyl alcohol (PVA) polymer. The physicochemical characterization of the prepared polymer-coated drug ceramic nanocomposite (DOX-HAp-PVA) was carried out using Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron spectroscopy, and particle size distribution. Furthermore, the biocompatibility and the anticancer activity of the nanocomposite were explored by MTT assay study. Successfully synthesized DOX-HAp...
Source: Comptes Rendus Chimie - November 19, 2018 Category: Chemistry Source Type: research
Synthesis of recoverable palladium composite as an efficient catalyst for the reduction of nitroarene compounds and Suzuki cross-coupling reactions using sepiolite clay and magnetic nanoparticles (Fe3O4@sepiolite-Pd2+)
In this study, sepiolite was used as a ligand for the heterogenization of palladium chloride on Fe3O4 nanoparticle surface as a novel, high temperature stable, and recoverable green catalyst (Fe3O4@sepiolite-Pd2+). The catalytic activity of this system was tested in the reduction of nitroarene compounds and the Suzuki cross-coupling reaction. The catalyst structure was characterized using spectroscopic data and magnetic and thermal techniques such as Fourier transform infrared, scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction, vibrating sample magnetometer (VSM), and thermogravime...
Source: Comptes Rendus Chimie - November 19, 2018 Category: Chemistry Source Type: research
Thermodynamical aspects of the spin crossover phenomenon
Publication date: Available online 12 November 2018Source: Comptes Rendus ChimieAuthor(s): William Nicolazzi, Azzedine BousseksouAbstractFundamental aspects of spin crossover (SCO) mechanisms are reviewed through considerations of ligand/crystal field theory, thermodynamics, and modeling of the thermoinduced spin transition in the solid state based on macroscopic–mesoscopic approaches . In particular, we highlight success of thermodynamic models in the simulation of first-order spin transitions with hysteretic behaviors (bistability) and multistep conversions. Bistability properties originate from elastic interactions, t...
Source: Comptes Rendus Chimie - November 14, 2018 Category: Chemistry Source Type: research
Editorial Board - English
Publication date: November 2018Source: Comptes Rendus Chimie, Volume 21, Issue 11Author(s): (Source: Comptes Rendus Chimie)
Source: Comptes Rendus Chimie - November 11, 2018 Category: Chemistry Source Type: research
Editorial Board - French
Publication date: November 2018Source: Comptes Rendus Chimie, Volume 21, Issue 11Author(s): (Source: Comptes Rendus Chimie)
Source: Comptes Rendus Chimie - November 11, 2018 Category: Chemistry Source Type: research
