Functionalized silica nanoparticles for trapping Pb<sup>2</sup><sup>+</sup> ions via diazo‐azomethine scaffolds

Narula, Priyanka; Mutneja, Ruchi; Singh, Raghubir; Kaur, Varinder

doi:10.1002/aoc.3513

Cited by 5 publications

(4 citation statements)

References 47 publications

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“…The reaction of the carbonyl group with the 3‐aminopropylsilyl group is very well known in literature. [ 61–63 ]…”

Section: Resultsmentioning

confidence: 99%

“…The chemicals such as 5-bromo-2-hydroxybenzaldehyde (Aldrich), 2-hydroxy-5-methylbenzaldehyde (TCI), copper(II)acetate dihydrate (Merck), ferric sulphate (Merck), ferrous sulphate heptahydrate (Merck), 3-aminopropyltriethoxysilane (Aldrich), sodium methoxide (Aldrich), sodium borohydride (Avra), sodium bicarbonate (Avra) and tetraethoxysilane (Aldrich) were used as such without any purification. The compounds L-phenylalaniol, [66] 3-(chloromethyl)-2-hydroxy-5-methylbenzaldehyde [67] and 3-aminopropy -lsilatrane [62,68] were synthesized using procedures reported in literature. The magnetic nano-cores (Fe 3 O 4 ), magnetic nanosilica (Fe 3 O 4 @SiO 2 ) and aminopropyl functionalized magnetic nanosilica (Fe 3 O 4 @SiO 2 /NH 2 ) were synthesized according to previously reported methods in literature [51,52] (for detail procedure see Sections S2.1-S2.3).…”

Section: Methodsmentioning

confidence: 99%

“…The reaction of the carbonyl group with the 3-aminopropylsilyl group is very well known in literature. [61][62][63] The PXRD patterns of (Figure 2b). The identical peaks in the X-ray diffraction patterns after modification of magnetic nanosilica indicated that the crystalline nature of the particles persisted even after the incorporation of silica and copper complex.…”

Section: Surface Functionalization Aspectsmentioning

confidence: 99%

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Dichiral [4.4.3.0^1,5]tridecane copper(II) cluster derived from a tripodal ligand having unsymmetrical podands and the linker: Synthesis, structure, surface grafting and catalytic aspects

Singh

Taya

Agarwal

et al. 2020

Applied Organom Chemis

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Pseudo-atranes have a significant role in catalysis; however, obtaining chiral pseudo-atranes for covalent functionalization of heterogeneous catalytic surfaces is very challenging. Herein, synthesis of a chiral tripodal amine [N{CH (CH 2 Ph)CH 2 OH}{CH 2 (4 Br C 6 H 3 OH)}{CH 2 (2 CHO 4 Me C 6 H 2 OH)}] (1) and a dichiral [4.4.3.0 1,5 ]tridecane copper(II) cluster, that is, (Cu[N{CH (CH 2 Ph)CH 2 OH}{CH 2 (4 Br C 6 H 3 O)}{CH 2 (2 CHO 4 Me C 6 H 2 O)}]) 2 (2) is described. The compounds are characterized by elemental analyses, Fourier transform infrared (FT-IR) spectroscopy, mass spectrometry and single-crystal X-ray crystallography (for 2). The compound 2 is the first example of chiral pseudo-copper(II)atrane in which three unsymmetrical arms (two phenolic and a chiral ethanolic arm) are fused via Cu N transannular bond. The free CHO group present in one of the tricyclic arms of the 2 is tested as a linker to load it on 3-aminopropyltriethoxysilane-functionalized magnetic nanosilica for catalytic applications. The loading of 2 on magnetic nanosilica through CHO was confirmed by FT-IR spectroscopy, and the 2-loaded magnetic nanosilica (Fe 3 O 4 @SiO 2 /2) was characterized by powder X-ray diffraction, vibrating sample magnetometry, scanning electron microscopy, energydispersive X-ray spectroscopy and elemental mapping. The Fe 3 O 4 @SiO 2 /2 was found highly efficient, retrievable, eco-friendly and green catalyst for obtaining β-amino alcohols in excellent yields in an aqueous medium. Overall, present work is the first report on synthetic, structural and catalytic aspects of dichiral cluster of copper(II)atrane possessing unsymmetrical tricyclic arms. K E Y W O R D S bisphenolate, pseudo-atrane, functionalized magnetic silica, unsymmetrical tripod, epoxide ringopening [Correction added on 4 November 2020, after first online publication: The three chemical structures in the first two rows of Table 4 were transposed and are now placed correctly.]

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“…The reaction of the carbonyl group with the 3‐aminopropylsilyl group is very well known in literature. [ 61–63 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Surface Functionalization Aspectsmentioning

confidence: 99%

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Dichiral [4.4.3.0^1,5]tridecane copper(II) cluster derived from a tripodal ligand having unsymmetrical podands and the linker: Synthesis, structure, surface grafting and catalytic aspects

Singh

Taya

Agarwal

et al. 2020

Applied Organom Chemis

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“…Nanoparticles exhibit intrinsic surface activity and due to their high surface areas and reactive atom or functional group strongly chemisorb many chemical compounds. The size, surface structure and their intraparticle interaction extend their recent potential application…”

Section: Introductionmentioning

confidence: 99%

Intensified removal of Malachite green by AgOH‐AC nanoparticles combined with ultrasound: Modeling and optimization

Solaymani

Ghaedi

Karimi

et al. 2017

Applied Organom Chemis

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In this work Random Forest (RF) and Response surface methodology (RSM) were used to model and predict the efficiency of malachite green removal from aqueous solution by ultrasound-assisted adsorption onto the silver hydroxide nanoparticles loaded on activated carbon (AgOH-NPs-AC). The prepared nanoparticles were characterized by SEM, FTIR, XRD and TEM. The parameters such as pH, initial MG concentration, sonication time and adsorbent dosage involved in the adsorption process were set within the ranges 2.0-10, 4-20 mg L −1 , 2-6 min and 0.005-0.025 g, respectively. The performance of the RF and CCD models for the description of experimental data was evaluated in terms of the coefficient of determination (R 2 ), the root mean squared error (RMSE), mean absolute error (MAE) and absolute average deviation (AAD). The obtained results showed that the RF model outperformed in comparison to classical statistical model for modeling the process of dye adsorption. Desirability function approach (DFA) and Genetic algorithm (GA) combined central composite design (CCD) as global optimization technique were used for simultaneous optimization of effective factors. GA and DFA were revealed that 20 mg L −1 MG by 0.025 g AgOH-NPs-AC at pH = 8.0 and sonication time for 6 min with adsorption capacity 40.98 and 41.99 mg g −1 can be removed, respectively. The equilibrium adsorption data were analyzed by Langmuir Freundlich, Temkin and Dubinin-Radushkevich isotherm models. The best fit to the data was obtained from the Langmuir model.Meanwhile, the maximum adsorption capacity for MG by 0.01, 0.02 and 0.025 g of AgOH-NPs-AC was estimated 57.143, 42.735 and 40.980 mg g −1 , respectively.Analysis of experimental adsorption data to various kinetic models shows the applicability of the second-order equation model. The variable importance principle also shows that RF give maximum importance to sonication time for removal of MG.

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Dual role of silatranized Schiff base as a fluorimetric probe and a linker to functionalize graphene oxide for the selective detection and adsorption of zinc ions

Kaur¹,

Singh²,

Kaur

2020

Inorganica Chimica Acta

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Functionalized silica nanoparticles for trapping Pb²⁺ ions via diazo‐azomethine scaffolds

Cited by 5 publications

References 47 publications

Dichiral [4.4.3.0^1,5]tridecane copper(II) cluster derived from a tripodal ligand having unsymmetrical podands and the linker: Synthesis, structure, surface grafting and catalytic aspects

Dichiral [4.4.3.0^1,5]tridecane copper(II) cluster derived from a tripodal ligand having unsymmetrical podands and the linker: Synthesis, structure, surface grafting and catalytic aspects

Intensified removal of Malachite green by AgOH‐AC nanoparticles combined with ultrasound: Modeling and optimization

Dual role of silatranized Schiff base as a fluorimetric probe and a linker to functionalize graphene oxide for the selective detection and adsorption of zinc ions

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Functionalized silica nanoparticles for trapping Pb2+ ions via diazo‐azomethine scaffolds

Cited by 5 publications

References 47 publications

Dichiral [4.4.3.01,5]tridecane copper(II) cluster derived from a tripodal ligand having unsymmetrical podands and the linker: Synthesis, structure, surface grafting and catalytic aspects

Dichiral [4.4.3.01,5]tridecane copper(II) cluster derived from a tripodal ligand having unsymmetrical podands and the linker: Synthesis, structure, surface grafting and catalytic aspects

Intensified removal of Malachite green by AgOH‐AC nanoparticles combined with ultrasound: Modeling and optimization

Dual role of silatranized Schiff base as a fluorimetric probe and a linker to functionalize graphene oxide for the selective detection and adsorption of zinc ions

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Functionalized silica nanoparticles for trapping Pb²⁺ ions via diazo‐azomethine scaffolds

Dichiral [4.4.3.0^1,5]tridecane copper(II) cluster derived from a tripodal ligand having unsymmetrical podands and the linker: Synthesis, structure, surface grafting and catalytic aspects

Dichiral [4.4.3.0^1,5]tridecane copper(II) cluster derived from a tripodal ligand having unsymmetrical podands and the linker: Synthesis, structure, surface grafting and catalytic aspects