Synthesis, characterization, spectral and catalytic activity of tetradentate (NNNO) azo-imine Schiff base copper(II) complexes

Pratihar, Jahar Lal; Mandal, Paritosh; Brandão, Paula; Mal, Dasarath; Félix, Vítor

doi:10.1016/j.ica.2018.04.042

Cited by 20 publications

(4 citation statements)

References 64 publications

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“…In the case of the complex (2) the values of νas(CO2) = 1587 cm -1 and νs(CO2) = 1388 cm -1 indicate presence of acetate group acting as monodentate fashion [38]. In the case of complex (3), the additional bands at 1070 and 619 cm -1 clearly reveal non-coordinated perchlorate anion playing role of counter-ion [39]. In the spectrum of the copper complex (4) bands attributable to coordinated and uncoordinated nitrate groups are observed.…”

Section: [Insert Scheme 1]mentioning

confidence: 94%

Metal transition complexes of tridentate Schiff base ligands derived from 2-hydrazinopyridine: synthesis, spectroscopic characterization and X-ray structures

et al. 2019

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Mononuclear complexes of 1-(pyridin-2-ylmethylidene)-2-(pyridin-2-yl)hydrazine (HL 1 ) and 1-(pyridin-2-yl)-2-(1-, [Zn(HL 1 )(CH3COO)2] . (H2O)3 (2), [Mn(HL 2 )2] . (ClO4)2 (3) and [Cu(HL 2 )(NO3)2] (4), were synthesized and characterized by physico-chemical and spectroscopic methods and X-ray structure determination. The mononuclear compounds 1, 2 and 4 contain one ligand molecule per metal atom while the manganese (II) atom in the compound 3 is coordinated to two ligand molecules. Both ligands coordinated to the transition metal center in tridentate fashion through two Npyridyl atoms and one Nimino atom. The chloride and acetate anions coordinate in monodentate manner respectively in complex 1 and in complex 2. In complex

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Section: [Insert Scheme 1]mentioning

confidence: 94%

Metal transition complexes of tridentate Schiff base ligands derived from 2-hydrazinopyridine: synthesis, spectroscopic characterization and X-ray structures

et al. 2019

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“…According to the known published data [55][56][57][58], it can be assumed that several MR-copper cation coordination compounds can be formed in the system in an acid medium (pH < 4.4): a Cu(MR-H + ) 2 complex (MR as a bidentant ligand) and a Cu(MR-H + )(H 2 O) 2 complex (MR as a monodentant ligand). Apparently, the complexation of MR with copper can occur in a neutral medium at a pH of ~7.…”

Section: Complexationmentioning

confidence: 99%

Effect of Azo Compounds on the Structure and Mechanical Properties of a Copper Coating Electrodeposited on Oxidized Aluminum Alloys

Белов¹,

Maximov²,

Belyaev

et al. 2021

Inorg. Mater. Appl. Res.

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A new method for the electrodeposition of copper on oxidized aluminum alloys to form electrolytic coatings exhibiting high performance properties has been discussed. The effect of an azo compound-methyl red (MR)-additive on the structure and physicomechanical properties of the copper coatings formed on oxidized aluminum has been studied. Samples of aluminum alloys AD1M and AMg6BM have been subjected to an anodic treatment under identical conditions in two oxidation electrolytes of different compositions. Copper has been electrodeposited on oxidized aluminum alloy samples using a standard copper plating electrolyte. Comparison with a copper plating electrolyte of an identical composition with an MR azo dye additive has been conducted. The microstructure and adhesive properties of the copper coating formed on oxidized aluminum alloys have been studied. The relationship between the physicomechanical properties of the copper coating (microhardness, open porosity, adhesion) and the action of an azo dye additive in the copper plating electrolyte has been studied. The use of this technology will make it possible not only to increase the reliability and durability of machine parts and mechanisms but also to restore old parts and mechanisms.

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“…Per cent change of the QYs of the Cu complexes of Th, AC and AA were to be 64 ± 4.31%, 74 ± 1.03% and 104 ± 2.64% compared to those of pure dyes, respectively. This altering was not a surprising result for Th and AC because of the electron acceptor property of Cu in their complexes attributed to metal‐to‐ligand charge transfer (MLCT) absorptions 58 and photoinduced electron transfer process, 59 but not for AACu because of the steric effect of two methyl groups and their hindering electron donation to the metal atom 60–62 …”

Section: Resultsmentioning

confidence: 99%

Spectroscopic and electrochemical characterizations of copper complexes with thionine, azure C and azure A

Bayındır,

Ersin,

Nazır

et al. 2024

Applied Organom Chemis

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Structures held together by secondary interactions such as intramolecular or intermolecular hydrogen bonding, electrostatic and π–π interaction without covalent bonds can exhibit new properties such as high orientation, optoelectronics, biocompatibility and reversibility (self‐renewal). Recently, interest has been growing surrounding novel molecules fashioned through non‐covalent interactions. These molecules have garnered attention due to their significant roles in both physical and chemical applications. However, the formation of complexes between cationic phenothiazine derivative dyes, commonly employed in electrochemical studies, and diverse metal groups presents a challenge. Therefore, the existing literature contains only a scant number of studies concerning the formation of phenothiazine complexes with metal salts. In this study, metal complexes of thionine, azure C and azure A with copper(II) chloride were prepared using two steps: dissolving and then slow evaporation of dyes‐copper(II) chloride in acetonitrile. Besides the theoretical computations, thermal, spectral, electrochemical and fluorescence techniques were performed to determine the characteristics of the monoclinic crystals of Cu–dyes complexes. Cl− ion in the dyes and copper(II) chloride conjugated to form [CuCl3]−, then this anion electrostatically bound to cationic phenothiazine ring bond to be phenothiazine+[CuCl3]−. Cu–dye complexes showed interestingly high electron transportation. In addition, prepared Cu–dye complexes have a great potential to be used in optical and spectral applications with extraordinary behaviour of their spectral and fluorescence features.

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Synthesis, characterization, spectral and catalytic activity of tetradentate (NNNO) azo-imine Schiff base copper(II) complexes

Cited by 20 publications

References 64 publications

Metal transition complexes of tridentate Schiff base ligands derived from 2-hydrazinopyridine: synthesis, spectroscopic characterization and X-ray structures

Metal transition complexes of tridentate Schiff base ligands derived from 2-hydrazinopyridine: synthesis, spectroscopic characterization and X-ray structures

Effect of Azo Compounds on the Structure and Mechanical Properties of a Copper Coating Electrodeposited on Oxidized Aluminum Alloys

Spectroscopic and electrochemical characterizations of copper complexes with thionine, azure C and azure A

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