Synthesis, X-ray crystal structures, spectroscopic and cyclic voltammetric studies of Cu(II) Schiff base complexes of pyridoxal

Naskar, Sumita; Naskar, Subhendu; Mayer‐Figge, Heike; Sheldrick, William S.; Chattopadhyay, Shyamal Kumar

doi:10.1016/j.poly.2010.11.027

Cited by 29 publications

(9 citation statements)

References 24 publications

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“…The first is ascribed to the reoxidation of Cu(I)/Cu(0), the second to the reoxidation of Cu(II)/Cu(I) while the third one may be attributed to the oxidation of Cu(III)/Cu(II). These results may be approached to those reported in the literature [22]. As for the wave located at + 0.841 V/SCE, it corresponds to the anodic oxidation of pyrrole moieties leading to the formation of poly(pyrrole) films.…”

Section: Methodssupporting

confidence: 66%

A novel copper(II)-Schiff base complex containing pyrrole ring: Synthesis, characterization and its modified electrodes applied in oxidation of aliphatic alcohols

Ourari

Aggoun

Ouahab

2013

Inorganic Chemistry Communications

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International audienceA new copper(II) complex Cu(II)-L containing N2O2 donor atoms has been prepared from 6-[3′-(N-pyrrol)propoxy]-2-hydroxyacetophenone and diaminoethane in the presence of copper acetate monohydrate. It was characterized by spectroscopic methods such as FT-IR, UV-vis, mass spectra, elemental analysis and cyclic voltammetry. The molecular structure of Cu(II)-L has also been confirmed by X-ray diffraction analysis. The electrochemical behavior of copper(II)-Schiff base complex containing pyrrol groups has been investigated in DMF and acetonitrile solutions using cyclic voltammetry. Thus, conducting polymeric films of polypyrrole were obtained on the surfaces of glassy carbon and ITO electrodes using copper(II) complex as monomer. The modified electrodes were electrochemically and morphologically characterized and their electrocatalytic properties in heterogeneous phase have also been investigated. The AFM studies show that the morphology of polypyrrole (PPy) films on ITO-electrodes depends on the number of cyclical scans. The electrocatalytic performances of this complex seem to be more efficient towards the electro-oxidation of isopropylic alcohol than any other kinds of alcohols such as methanol, ethanol and benzyl alcohol. The electro-reduction of carbon dioxide was also examined

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Section: Methodssupporting

confidence: 66%

A novel copper(II)-Schiff base complex containing pyrrole ring: Synthesis, characterization and its modified electrodes applied in oxidation of aliphatic alcohols

Ourari

Aggoun

Ouahab

2013

Inorganic Chemistry Communications

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“…Thus, unlike the relatively planar conformation of the pydxen ligand in 1· H 2 O and 2 , the pydxpn ligand in 5 assumes a dome‐shaped conformation (Figure 3). Similar behavior was observed for Cu II complexes of pydxen and pydxpn,10c as well as for 12 (Scheme , Table 1). 17 As the X‐ray crystal structure of this complex has been reported by another group during the preparation of this manuscript,9i we shall omit a detailed discussion of the metric parameters of this molecule, as they are very similar to those in the earlier report.…”

Section: Resultssupporting

confidence: 81%

Synthesis, X‐ray Crystal Structures, and Spectroscopic, Electrochemical, and Theoretical Studies of Mn^III Complexes of Pyridoxal Schiff Bases with Two Diamines

Naskar

Butcher

et al. 2013

Eur J Inorg Chem

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Six Mn III complexes of general formula [Mn(L)XY], in which L is a dideprotonated Schiff base ligand N,NЈ-bis(pyridoxylidene)ethylenediamine (L 1 H 2 or pydxen) or N,NЈ-bis(pyridoxylidene)-1,3-propanediamine (L 2 H 2 or pydxpn), X = Cl, N 3 , NCS, and Y = H 2 O, MeOH, EtOH, and another Mn III compound [Mn(L 1 )(H 2 O) 2 ]Cl have been synthesized. The structures of five of the complexes were determined by single-crystal X-ray diffraction studies. The compounds show a quasireversible Mn III /Mn II couple at ca. 0 V (vs. Ag/AgCl) and two to three overlapping oxidations at 1.0-1.3 V, which are assigned to Mn III /Mn IV oxidation and ligand (phenolate) oxidation. The redox potential of the phenolate moiety reported here is very similar to the Y z /Y z ·+ potential of photosystem II (PS II, Y z = tyrosine). Spectrochemical studies and[a]

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“…Coordination chemistry of Schiff base ligands is a promising research field in chemistry because of their metal complexes having crucial role in biological systems . Some of the Schiff bases compounds have many biological activities, such as antibacterial, anticancer, antimalarial, antiinflammatory, antifungal and antiviral properties .…”

Section: Introductionmentioning

confidence: 99%

Cobalt (II) Complexes Derived from Azo‐Azomethine Ligands: Synthesis, Characterization, Solvatochromic, Fluorescence, Thermal, Electrochemical and Antimicrobial Properties

Arabahmadi

2019

ChemistrySelect

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Three new cobalt (II) complexes were prepared by the condensation between the ligands, 1-{3-[(1-ethoxy-2-hydroxyethyl-imino)methyl]-4-hydroxyphenylazo}-4-nitro benzene (L 1 ),, with cobalt(II) acetate (molar ratio 1:1) in methanol as the solvent. These prepared cobalt (II) complexes were characterized by infrared, UV/Vis and fluorescence spectroscopy, elemental analysis and magnetic susceptibility measurements. The redox behavior of Schiff base ligands and cobalt (II) complexes determined using cyclic voltammetry technique. The solvatochromic behavior of the Schiff base ligands L 1 -L 3 were recorded in three organic solvents with different polarity. On the basis of the UV/Vis and infrared spectra, the azoazomethin ligands coordinated to the Co (II) ion through phenolic oxygen, alcoholic oxygen, etheric oxygen and imino nitrogen. The prepared ligands and their complexes be served as photoactive materials due to their intraligand (π!π*) fluorescence. The effective magnetic moments of complexes CoL 1 , CoL 2 and CoL 3 are 3.95, 3.9 and 3.98 B.M., respectively that indicate these complexes have tetrahedral configuration. Thermal properties and decomposition behaviors of cobalt (II) complexes are reported by DTA/TG curves. Antibacterial activities of both ligands and complexes were studied.[a] Dr. out in the temperature range from 20 to 800°C. These complexes (CoL 1 -CoL 3 ) have been prepared by the key reaction between the Schiff base ligands (L 1 -L 3 ) and cobalt (II) acetate (1:1 molar ratio) in absolute ethanol (Scheme 1). 2 3 4 5 6 7 8

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Synthesis, X-ray crystal structures, spectroscopic and cyclic voltammetric studies of Cu(II) Schiff base complexes of pyridoxal

Cited by 29 publications

References 24 publications

A novel copper(II)-Schiff base complex containing pyrrole ring: Synthesis, characterization and its modified electrodes applied in oxidation of aliphatic alcohols

A novel copper(II)-Schiff base complex containing pyrrole ring: Synthesis, characterization and its modified electrodes applied in oxidation of aliphatic alcohols

Synthesis, X‐ray Crystal Structures, and Spectroscopic, Electrochemical, and Theoretical Studies of Mn^III Complexes of Pyridoxal Schiff Bases with Two Diamines

Cobalt (II) Complexes Derived from Azo‐Azomethine Ligands: Synthesis, Characterization, Solvatochromic, Fluorescence, Thermal, Electrochemical and Antimicrobial Properties

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Synthesis, X-ray crystal structures, spectroscopic and cyclic voltammetric studies of Cu(II) Schiff base complexes of pyridoxal

Cited by 29 publications

References 24 publications

A novel copper(II)-Schiff base complex containing pyrrole ring: Synthesis, characterization and its modified electrodes applied in oxidation of aliphatic alcohols

A novel copper(II)-Schiff base complex containing pyrrole ring: Synthesis, characterization and its modified electrodes applied in oxidation of aliphatic alcohols

Synthesis, X‐ray Crystal Structures, and Spectroscopic, Electrochemical, and Theoretical Studies of MnIII Complexes of Pyridoxal Schiff Bases with Two Diamines

Cobalt (II) Complexes Derived from Azo‐Azomethine Ligands: Synthesis, Characterization, Solvatochromic, Fluorescence, Thermal, Electrochemical and Antimicrobial Properties

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Synthesis, X‐ray Crystal Structures, and Spectroscopic, Electrochemical, and Theoretical Studies of Mn^III Complexes of Pyridoxal Schiff Bases with Two Diamines