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In this paper, neodymium removed by liquid-solid extraction is made by magnetic nanoparticles functionalized by the poly(aminoethylene N-methyl 1-formic acid, 1-phosphonic acid) (PAEMFP), with two different sizes. For a quantity of 0.01 g... more
In this paper, neodymium removed by liquid-solid extraction is made by magnetic nanoparticles functionalized by the poly(aminoethylene N-methyl 1-formic acid, 1-phosphonic acid) (PAEMFP), with two different sizes. For a quantity of 0.01 g of magnetic particles some parameters were studied. Optimal extraction yield was achieved in a initial pH equal at 7.0 for fine particles and pH 6.0 for the large particles. The experimental capacity obtained was 25 mg g−1 for larges particles and 23 mg g−1 for fines particles. The quantitative elution study of neodymium(III) can be realized with acetic acid 0.5 mol L−1 after 120 min of shaking for two sizes.
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An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely... more
An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
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Cloud point extraction (CPE) was used to extract uranium (VI) from an aqueous solution in acetate media. The methodology used is based on the formation of uranyl-ionic liquid (I) complexes and uranyl-D2EHPA soluble in a micellar phase of... more
Cloud point extraction (CPE) was used to extract uranium (VI) from an aqueous solution in acetate media. The methodology used is based on the formation of uranyl-ionic liquid (I) complexes and uranyl-D2EHPA soluble in a micellar phase of non-ionic surfactant (Triton X-100). The uranium (VI) complexes are then extracted into the surfactant-rich phase at ambient temperature. The ionic liquid (IL) used as a chelating agent was synthesized and characterized in this study. It is composed of N-butyl N'-triethoxy methyl imidazolium cation and diethylhexylphosphate (D2EHPA-H) as anion. The effect of the IL on the extraction efficiency was studied in presence and in absence of IL's cation in acetate medium.
Research Interests: Ionic Liquid and Uranium
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Using density functional theory technique in the B3LYP approximation and 6-31G (d,p) basis set, the molecular structural parameters and of tetra ketones and tetra substituted 1-4 have been investigated. The equilibrium geometries,... more
Using density functional theory technique in the B3LYP approximation and 6-31G (d,p) basis set, the molecular structural parameters and of tetra ketones and tetra substituted 1-4 have been investigated. The equilibrium geometries, electronic properties, bonding behavior, stability and active sites of title compounds have been studied. The stability of the molecules arising from hyper-conjugative interaction and charge delocalization has been analyzed using NBO analysis. According to the MEP analysis, negative region (red) is mainly over the carbonyl of ketone function showing large activity. The calculated first hyperpolarizability of the title compounds is greater than that of the standard NLO material urea in compounds 2 and 4 and they are attractive objects for future studies of nonlinear optical properties.
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This study represents an integral approach towards understanding the electronic and structural aspects of 4-[(1H-indol-3-ylmethylene)-amino] benzenesulfonamide derivatives 1-4 by the DFT/B3LYP method and 6-31G (d,p) basis set. The... more
This study represents an integral approach towards understanding the electronic and structural aspects of 4-[(1H-indol-3-ylmethylene)-amino] benzenesulfonamide derivatives 1-4 by the DFT/B3LYP method and 6-31G (d,p) basis set. The geometrical parameters of title compounds are also obtained by the same method. From the MEP map it is evident that the negative electrostatic potential regions are mostly localized over the sulfamide function and are possible sites for electrophilic attack and positive regions are localized around the hydrogen atoms indicating possible sites for nucleophilic attack. The frontier molecular orbital is determined by means the HOMO and LUMO analysis which is used to explain the charge transfer within the molecule. The chemical reactivity descriptors were calculated to study the reactive sites within molecules and the results show that compound 3 is the most reactive. Furthermore the Mulliken population analysis on atomic charges is calculated and interpreted....
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The optimized molecular structure and electronic features of aryl sulfonyl piperazine derivatives 1-4 have been investigated theoretically using Gaussian 09 software package and DFT/B3LYP method with 6-31G (d,p) basis set. The reactivity... more
The optimized molecular structure and electronic features of aryl sulfonyl piperazine derivatives 1-4 have been investigated theoretically using Gaussian 09 software package and DFT/B3LYP method with 6-31G (d,p) basis set. The reactivity of the title molecules was investigated and both the positive and negative centers of the molecules were identified using molecular electrostatic potential (MEP) analysis which the results illustrate that the regions reveal the negative electrostatic potential are localized in sulfamide function while the regions presenting the positive potential are localized in the hydrogen atoms. The energies of the frontier molecular orbitals and LUMO-HOMO energy gap are measured to explain the electronic transitions. Global reactivity parameters of the aryl sulfonyl piperazine derivatives molecules were predicted to find that the more reactive and softest compound is the compound 3. Mulliken’s net charges have been calculated and results show that 3N is the more...
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ABSTRACTIn this work, the adsorption of basic fuchsine largely used in industries was studied by Zn/Al-HDL intercalated with diamino-dodecylphosphonic acid (DDPA). The physicochemical characteristics of Zn/Al-DDPA were evaluated by... more
ABSTRACTIn this work, the adsorption of basic fuchsine largely used in industries was studied by Zn/Al-HDL intercalated with diamino-dodecylphosphonic acid (DDPA). The physicochemical characteristics of Zn/Al-DDPA were evaluated by Brunauer–Emmett–Teller method, Fourier transform infrared spectroscopy, X-ray diffraction, and the elementary analysis to determine the rate of grafting. The effect of concentration of fuchsine, reaction times, ionic strength effect and the effect of the temperature were studied. The thermodynamic and kinetic studies were carried out and the results confirmed that all adsorption processes were spontaneous and thermodynamically favorable and that the adsorbent is reusable after three steps of desorption. The best uptake in this study was 90%.
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Research Interests: Engineering, Chemistry, Analytical Chemistry, Chromatography, Capillary electrophoresis, and 15 moreIonic Liquid, Experimental Design, Medicine, Asymmetric catalysis, Cyclodextrin, CHEMICAL SCIENCES, Cyclodextrins, Optimality Condition, Enantiomer, Enantioseparation, Atropisomers, Elution, Structure Optimization, capillary zone electrophoresis, and stereoisomerism
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Multivariate methods of pattern recognition, classification and discriminant analysis have been found most useful in many types of chemical and biological problems. Predicting the biological activity of molecules from their chemical... more
Multivariate methods of pattern recognition, classification and discriminant analysis have been found most useful in many types of chemical and biological problems. Predicting the biological activity of molecules from their chemical structures is a principal problem in drug discovery. Pattern recognition has gained attention as methods covering this need. In the present study classification models for inhibiting Human Immunodeficiency Virus (HIV) activity, based on Support Vector Machines (SVM) and Decision trees (DT), are developed. The obtained results indicate that SVM and DT can be employed as a forceful tool for quantitative structure-activity relationship studies.
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The present work addresses the students in chemistry, chemical engineering of the environment, as well as the specialists in chemistry of the phosphorus and the organophosphate compounds, in Hydrometallurgy both at the industrial level... more
The present work addresses the students in chemistry, chemical engineering of the environment, as well as the specialists in chemistry of the phosphorus and the organophosphate compounds, in Hydrometallurgy both at the industrial level and at the level of the scientific research. This work aims to be a guide for the chemistry of the agent's complexants of types phosphonic & aminophosphonic acids, consisted widely used in the liquid-liquid extraction for the extraction of metals and rare earths, in the proceeding of ores and in the aqueous effluent treatments for the recovery and the valuation of rare earths, N-C-P in medicinal chemistry, pesticides/herbicides and water-decontamination systems, organometallic complexes: MOF, gas absorption, proton conductivity and Magnetic shielding tensors. Broche : 108 pages Editeur : Editions universitaires europeennes (15 janvier 2018) Langue : Anglais
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ABSTRACT This reply discusses the points raised by J.P. Canselier. Corrections from figures as well as clarifications of Section 2 mentioned in the text.
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A new series of mono and bis amino-5H-chromeno [3,4-c] pyridin-5-one derivatives were prepared via the reaction of primary amines with 4-(2-(dimethylamino)vinyl)-2-oxo-2H-chromene-3-carbonitrile 3. The X-rays structures of... more
A new series of mono and bis amino-5H-chromeno [3,4-c] pyridin-5-one derivatives were prepared via the reaction of primary amines with 4-(2-(dimethylamino)vinyl)-2-oxo-2H-chromene-3-carbonitrile 3. The X-rays structures of 4-(hexylamino)-5H-chromeno[3.4-c]pyridin-5-one 4a are reported and discussed. The proposed synthesis method provides several advantages including a simple chemistry handling, mild reaction conditions and an environmentally friendly synthesis pathway.
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An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely... more
An entry from the Cambridge Structural Database, the world's repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
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The present work addresses the students in chemistry, chemical engineering of the environment, as well as the specialists in chemistry of the phosphorus and the organophosphate compounds, in Hydrometallurgy both at the industrial level... more
The present work addresses the students in chemistry, chemical engineering of the environment, as well as the specialists in chemistry of the phosphorus and the organophosphate compounds, in Hydrometallurgy both at the industrial level and at the level of the scientific research. This work aims to be a guide for the chemistry of the agent's complexants of types phosphonic & aminophosphonic acids, consisted widely used in the liquid-liquid extraction for the extraction of metals and rare earths, in the proceeding of ores and in the aqueous effluent treatments for the recovery and the valuation of rare earths, N-C-P in medicinal chemistry, pesticides/herbicides and water-decontamination systems, organometallic complexes: MOF, gas absorption, proton conductivity and Magnetic shielding tensors. Broche : 108 pages Editeur : Editions universitaires europeennes (15 janvier 2018) Langue : Anglais
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After the synthesis of polyethylenimine supported on silica, it has been used as a new and efficient catalyst in Knoevenagel and Michael condensations. The presence of the polyethylenimine in the catalytic system together with silica... more
After the synthesis of polyethylenimine supported on silica, it has been used as a new and efficient catalyst in Knoevenagel and Michael condensations. The presence of the polyethylenimine in the catalytic system together with silica displays an acido-basic character allows a better catalytic activity in the condensations. Carried out under microwave irradiation, without organic solvent and during short time, the syntheses are respectful towards green chemistry. The solid catalyst can be easily reused. This catalyst has the acido-basic character at the same time.
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This study investigates the capacity of polyamide nanofiltration membrane (SNTE NF270-2540) to extract the lanthanum (La) (III) and its mixtures with the iron (Fe) (III). A three - level factorial design and response surface methodology... more
This study investigates the capacity of polyamide nanofiltration membrane (SNTE NF270-2540) to extract the lanthanum (La) (III) and its mixtures with the iron (Fe) (III). A three - level factorial design and response surface methodology was used to evaluate the effects of different parameters, such as: pH (3.0 – 9.0), concentration (10 – 100 ppm), pressure (6.0 – 13.5 bars). The results showed that the retention of La (III) varied from 29 % to 100 %, depending on the experimental condition it was possible to extract all of La (III) and Fe (III) from the same mixture. The results showed that the extraction of La (III) reaches 100 % for 10 and 55 ppm at pH = 3.0 and for 100 ppm at pH = 9.0, under the pressure of 13.5 bars. At pH = 3.0, the extraction of the mixtures La (III) / Fe (III) (50 ppm / 50 ppm) and (100 ppm / 100 ppm) whatever the pressure was all (100 %). The study confirmed a high lanthanum extraction using polyamide nanofiltration membrane.