Nano magnetite supported phthalocyanine complexes of Cu(II) and Fe(II) as new heterogeneous effective catalysts for synthesis of β-amido ketones

Naeimi, Hossein; Rahmatinejad, Soraya

doi:10.1080/00958972.2018.1542493

Cited by 7 publications

(4 citation statements)

References 34 publications

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“…The macro heterocycles can behave as coordinating ligands for transition metals 13 . The main features of typical Cr(III) complexes are their kinetic inertness, nearly octahedral geometry, and preference for ‘hard’ (O‐ or halido) and N‐donor ligands.…”

Section: Introductionmentioning

confidence: 99%

“…12 The macro heterocycles can behave as coordinating ligands for transition metals. 13 The main features of typical Cr(III) complexes are their kinetic inertness, nearly octahedral geometry, and preference for 'hard' (O-or halido) and N-donor ligands. Ammine, amines, N-heterocycles, and mixed O/N-donor ligands are among the best-known ligands for Cr(III).…”

Section: Introductionmentioning

confidence: 99%

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Selective determination of Cr(III) by modified carbon nanotube paste electrode: a potentiometric study

Barati

Masroornia

Es’haghi

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND Potentiometric detections based on ion‐selective electrodes offer the advantages of simplicity, speed, and low cost over other electrochemical methods. In this work, the preparation of a novel carbon‐paste electrochemical sensor containing the synthesized N‐(1‐(4‐bromophenyl)‐3‐oxo‐3‐phenylpropyl)acetamide is described. Multi‐walled carbon nanotubes (MWCNTs) were incorporated into the electrode composition to promote electron transfer reactions. The modified carbon paste electrode was evaluated as a selective sensor for the detection of chromium (III). RESULTS The prepared sensor showed nearly stable potentials in the pH range of 4.0–6.5, with a fast response time (<15 s). At the optimum conditions, the potentiometric method exhibited a linear response toward Cr(III) concentration in the range of 5.0 × 10−7 to 1.0 × 10−3 mol L−1 with a Nernstian slope of 19.5 ± 0.1 mV per decade and a detection limit of 3.1 × 10−7 mol L−1. CONCLUSION The proposed sensor possesses the advantages of good selectivity to Cr(III) and an improved detection limit compared to the results of some other studies. Better selectivity can be attributed to the ability of the ionophore to form a stable chelate with Cr(III) ions. The new Cr(III) sensor showed excellent stability over 8 weeks and its response time was comparable to other previously reported chromium ion‐selective electrodes (ISEs) . The simple, fast, and cheap synthesis method of ionophore provided other advantages for this study. The modified electrode was also used as a sensor for the end‐point detection in the potentiometric titration of Cr(III) against ethylenediaminetetra acetic acid (EDTA). © 2021 Society of Chemical Industry (SCI).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Selective determination of Cr(III) by modified carbon nanotube paste electrode: a potentiometric study

Barati

Masroornia

Es’haghi

et al. 2022

J of Chemical Tech & Biotech

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“…Azide-alkyne 1,3-dipolar cycloaddition catalyzed by half sandwich Ru(II) complexes Guanidine-functionalized magnetic nanoparticles anchored to Fe(II)-or Cu(II)-phthalocyanine complexes 25 have shown to be efficient catalysts in another click reaction, the condensation of acetophenone 21, aromatic aldehydes 22 and nitriles 23 to give the corresponding β-ketoamides 24 (Scheme 4). 28 The procedure requires low loading of the catalysts, which can be reused at least six times without losing their catalytic activity. In the context of polymer chemistry, copper complexes with chelating N-donor ligands are the most important atom transfer radical polymerization (ATRP) catalysts, [29][30][31] and many examples of radical polymerization reactions using different types of monoguanidines as ligands for Cu(I) have been reported.…”

Section: Scheme 2 -Hydroxylation Of Carbonyl Compounds Catalyzed By a Dinuclear Pd(ii) Complexmentioning

confidence: 99%

Transition metal-guanidine complexes as catalysts in organic reactions. Recent developments

Barbolla¹,

Sotomayor²,

Lete³

2020

Arkivoc

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Guanidines have received great attention due to their application as superbasic proton sponges and organocatalysts, as well as excellent N-donor ligands able to coordinate with different metals. The introduction of different substituents can modulate the basicity/nucleophilicity of the guanidines, their coordination ability, and thus, the electronic and steric properties of their metal complexes, regulating their catalytic activity. This review presents recent developments on guanidine-based ligand families [monoguanidine, bis(guanidine) and hybrid guanidine ligands], highlighting their potential in transition metalcatalyzed reactions.

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“…[7] As reported by Hossein et al, the phthalocycnin complex of iron behaves as heterogenous catalyst for the preparation of β-amido ketones. [8] Polyazamacrocycle has fascinated an extensive significance in current times due to their capability of interacting with both ions like anion and cation and their wide applicability as ion sensors. [9][10][11][12][13][14] The designing, synthesis and evaluation of new drugs that improve the contrast between normal and diseased tissues strongly contributed to the recent developments in this area.…”

Section: Introductionmentioning

confidence: 99%

In‐vitro DNA binding and antimicrobial studies of trivalent transition metal ion based macrocyclic complexes

Sangwan

Singh

2019

Vietnam Journal of Chemistry

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In the current research work diaminotoluene based tetra-azamacrocyclic-14 membered [N4] macrocylic complexes of nitrate, chloride and acetate trivalent transition metals salts of Cr(III) and Fe(III) have been synthesized by taking the route of template methodology. The synthesized complexes were fully characterized by spectroscopic and physicoanalytical techniques like IR, ESI-MS, ESR, Powder XRD, TGA, UV-visible, magnetic moment, molar conductance, in addition to the elemental analysis measurements. The monomeric and electrolytic nature of the complexes is elucidated by the help of ESI-MS and molar conductance values that reveals about the 1:2 electrolytic behaviour. On the basis of above analytical techniques the complexes may be empirically formulated as [MLX]X2 in which L is macrocyclic ligand obtained from the [2+2] condensation reaction of 3,4-diaminotoluene (DAT) and dibenzoylmethane (DBM). The thermal data provides an indication towards the absence of water molecular and various decomposition steps in the complexes. Further the compounds were screened for their antimicrobial potency against few strains of bacteria and fungus and fair results were found from the above studies. In addition to these DNA binding activity was also performed in order to elucidate the mode of binding the newly synthesised complexes.

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Nano magnetite supported phthalocyanine complexes of Cu(II) and Fe(II) as new heterogeneous effective catalysts for synthesis of β-amido ketones

Cited by 7 publications

References 34 publications

Selective determination of Cr(III) by modified carbon nanotube paste electrode: a potentiometric study

Selective determination of Cr(III) by modified carbon nanotube paste electrode: a potentiometric study

Transition metal-guanidine complexes as catalysts in organic reactions. Recent developments

In‐vitro DNA binding and antimicrobial studies of trivalent transition metal ion based macrocyclic complexes

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