Extraction of metal ions from water with tetrapyrazolic macrocycles bound to Merrifield resin and silica gel

Radi, Smaail; Ramdani, Abdelkrim; Lekchiri, Yahya; Morcellet, Michel; Crini, Grégorio; Janus, Ludovic

doi:10.1002/1097-4628(20001227)78:14<2495::aid-app90>3.0.co;2-s

Cited by 28 publications

(2 citation statements)

References 15 publications

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“…We recently turned our interest to pyrazole molecules due to their versatility and ability to engage in extensive interactions, making them particularly advantageous in the design and synthesis of metal–organic coordination compounds [ 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ]. Such complexes could be proposed for various applications such as metal ion extraction [ 14 , 15 , 16 ], catalysis [ 17 ], adsorbents of heavy metals [ 18 , 19 , 20 , 21 , 22 ], and corrosion inhibitors [ 23 , 24 ]. Additionally, pyrazole compounds have attracted considerable interest due to their broad spectrum of biological properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Crystal Structures, Genotoxicity, and Antifungal and Antibacterial Studies of Ni(II) and Cd(II) Pyrazole Amide Coordination Complexes

El Mahdaoui,

Radi,

Draoui

et al. 2024

Molecules

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In this study, we synthesized two coordination complexes based on pyrazole-based ligands, namely 1,5-dimethyl-N-phenyl-1H-pyrazole-3-carboxamide (L1) and 1,5-dimethyl-N-propyl-1H-pyrazole-3-carboxamide (L2), with the aim to investigate bio-inorganic properties. Their crystal structures revealed a mononuclear complex [Ni(L1)2](ClO4)2 (C1) and a dinuclear complex [Cd2(L2)2]Cl4 (C2). Very competitive antifungal and anti-Fusarium activities were found compared to the reference standard cycloheximide. Additionally, L1 and L2 present very weak genotoxicity in contrast to the observed increase in genotoxicity for the coordination complexes C1 and C2.

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Section: Introductionmentioning

confidence: 99%

Synthesis, Crystal Structures, Genotoxicity, and Antifungal and Antibacterial Studies of Ni(II) and Cd(II) Pyrazole Amide Coordination Complexes

El Mahdaoui,

Radi,

Draoui

et al. 2024

Molecules

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“…In continuation of our work in this field [14][15][16][17][18][19][20][21][22][23][24][25], this paper describes the synthesis and the characterization of new surface materials obtained by grafting functionalized orth-, meta-or para-nitrophenyl on porous silica. The adsorption capacities of unmodified silica, and nitrophenyl-modified silicas towards Cu(II) were investigated and the extracted amounts of metals ions were determined by atomic absorption measurements.…”

Section: Introductionmentioning

confidence: 99%

New Polysiloxane Surfaces Modified with <i>ortho-, meta-</i> or <i>para</i>-Nitrophenyl Receptors for Copper Adsorption

Radi¹,

Basbas²,

Tighadouini³

et al. 2014

JSEMAT

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Porous SiO 2 has been chemically modified with functional ortho-, meta-or para-nitrophenyl moieties using the heterogeneous route. This synthetic route involved the reaction of carbaldehyde derivatives with 3-aminopropyl trimethoxysilane prior to immobilization on the support. The new modified surfaces have been characterized by elemental analysis, FT-IR, 13C NMR of the solid state, nitrogen adsorption-desorption isotherm, BET surface area, B.J.H. Pore sizes, thermogravimetry curves (TGA) and scanning electron microscope (SEM). The new materials exhibit good chemical and thermal stability. These products were employed as a Cu(II) adsorbent from aqueous solutions at room temperature using the batch technique. Flame atomic absorption spectrometry was used to determine the Cu(II) concentration in the filtrate after the adsorption process. The results indicate that under the optimum conditions, the maximum adsorption value for Cu(II) was 20.0 mg Cu(II) g −1 modified silica, whereas the adsorption capacity of the unmodified silica was only 1.0 mg Cu(II) g −1 silica. On the basis of these results, it can be concluded that it is possible to modify chemically SiO 2 with functional groups and use it as adsorbents for metals in aqueous media.

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Polymer‐immobilized N,N′‐bis(acetylacetone)ethylenediamine cobalt(II) Schiff base complex and its catalytic activity in comparison with that of its homogenized analogue

Gupta

AbdulKadir

Chand

2003

J of Applied Polymer Sci

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ABSTRACT:For the preparation of a heterogenized N,NЈ-bis(acetylacetone)ethylenediamine cobalt(II) Schiff base complex, first crosslinked polymer beads were prepared by the suspension copolymerization of styrene (48.97 mmol, 5.1 g), allyl chloride (48.97 mmol, 3.746 g), and divinyl benzene (DVB; 1.75 mmol, 0.228 g) in the presence of azobisisobutyronitrile (0.9 ϫ 10 Ϫ3 mmol, 0.15 g) as an initiator at 23 Ϯ 0.1°C under an inert atmosphere. The copolymerization of styrene, allyl chloride in the presence of gelatin (0.75 g), bentonite (2.0 g), and boric acid (2.5 g) produced beads of different crosslinked densities corresponding to the concentration of DVB in the reaction mixture. The amount of allyl chloride in the prepared beads varied from 5.40 to 7.40 mmol g Ϫ1 of beads with the amount of DVB varying from 2.0 to 0.8 mmol in the reaction mixture. A quadridentate Schiff base (acen) was prepared with ethylenediamine (5.0 mmol, 0.3 g) and acetylacetone (10.0 mmol, 1.0 g), and it was used to obtain a homogenized and heterogenized Co(II)(acen) 2 complex. The extent and arrangement of the Schiff base (acen) in the crosslinked beads depended on the availability of DVB in the reaction mixture. The amount of DVB in the reaction mixture influenced the extent of cobalt(II) ion loading, the degree of swelling, the porosity, and the pore size in the prepared beads. The beads (type IV) prepared with 1.75 mmol (0.228 g) of DVB in the reaction mixture showed a degree of swelling of 9.65% and efficiencies of loading and complexation for cobalt(II) ions of 49.4 and 85%, respectively, in comparison with beads obtained at other concentrations of DVB in the reaction mixture. The structure of free and polymer-supported Co(II)(acen) 2 complexes was verified with IR, UV, and magnetic measurements, which suggested a square planar geometry for the complexes under both conditions. The catalytic activities of the homogenized and heterogenized Co(II)(acen) 2 complexes were compared by the evaluation of the rate constant (k) for the decomposition of hydrogen peroxide. The heterogenized Co(II)(acen) 2 complex showed a high catalytic activity for the decomposition of hydrogen peroxide (k ϭ 2.02 ϫ 10 Ϫ4 s Ϫ1) in comparison with the homogenized Co(II)(acen) 2 complex (k ϭ 4.32 ϫ 10 Ϫ6 s Ϫ1). The energy of activation for the decomposition of hydrogen peroxide with the heterogenized Co(II)(acen) 2 complex was low (38.52 kJ mol Ϫ1 ) in comparison with that for the homogenized complex (73.44 kJ mol Ϫ1). In both cases, the rate of decomposition of hydrogen peroxide was directly proportional to the concentration of hydrogen peroxide and cobalt(II) ions. On the basis of experimental observations, a rate expression for the decomposition of hydrogen peroxide was derived.

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Extraction of metal ions from water with tetrapyrazolic macrocycles bound to Merrifield resin and silica gel

Cited by 28 publications

References 15 publications

Synthesis, Crystal Structures, Genotoxicity, and Antifungal and Antibacterial Studies of Ni(II) and Cd(II) Pyrazole Amide Coordination Complexes

Synthesis, Crystal Structures, Genotoxicity, and Antifungal and Antibacterial Studies of Ni(II) and Cd(II) Pyrazole Amide Coordination Complexes

New Polysiloxane Surfaces Modified with <i>ortho-, meta-</i> or <i>para</i>-Nitrophenyl Receptors for Copper Adsorption

Polymer‐immobilized N,N′‐bis(acetylacetone)ethylenediamine cobalt(II) Schiff base complex and its catalytic activity in comparison with that of its homogenized analogue

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Extraction of metal ions from water with tetrapyrazolic macrocycles bound to Merrifield resin and silica gel

Cited by 28 publications

References 15 publications

Synthesis, Crystal Structures, Genotoxicity, and Antifungal and Antibacterial Studies of Ni(II) and Cd(II) Pyrazole Amide Coordination Complexes

Synthesis, Crystal Structures, Genotoxicity, and Antifungal and Antibacterial Studies of Ni(II) and Cd(II) Pyrazole Amide Coordination Complexes

New Polysiloxane Surfaces Modified with &lt;i&gt;ortho-, meta-&lt;/i&gt; or &lt;i&gt;para&lt;/i&gt;-Nitrophenyl Receptors for Copper Adsorption

Polymer‐immobilized N,N′‐bis(acetylacetone)ethylenediamine cobalt(II) Schiff base complex and its catalytic activity in comparison with that of its homogenized analogue

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New Polysiloxane Surfaces Modified with <i>ortho-, meta-</i> or <i>para</i>-Nitrophenyl Receptors for Copper Adsorption