Binuclear transition metal complexes of bicompartmental SNO donor ligands: synthesis, characterization, and electrochemistry

Kulkarni, Naveen V.; Sathisha, M. P.; Budagumpi, Srinivasa; Kurdekar, Gurunath S.; Revankar, Vidyanand K.

doi:10.1080/00958971003770405

Cited by 20 publications

(13 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The significant bands observed in the IR spectra of the complexes are given in Table 2 and the main points are discussed below: i) Free ligands characteristic band of the thiol group ν(SH) at 2642-2800 cm -1 for these bands are absent in the metal complexes indicating deprotonation of the thiol group and complexation of sulfur atom with metal ions. A new low frequency band appears in the metal chelates in the region 436-499 cm -1 (assigned to ν(V-S)) confirms the vanadium-sulfur bond formation [25,26]. ii) The strong sharp bands appeared in the range 1600-1666 cm -1 are assigned to azomethine group ν(C=N) of the free ligand.…”

Section: Infrared Spectramentioning

confidence: 73%

“…These bands were shifted to lower frequency and reduced intensity on complex formation, suggesting the participation of nitrogen atom of azomethine group in coordination [20]. This is further supported by the presence of a new low frequency band in the region 491-531 cm -1 in the IR spectra of the vanadium complexes assigned to ν(V-N) [25,26]. iii) The spectra of the bidentate complexes show a sharp strong band in the range 949-979 cm -1 indicative of the presence of ν(V=O) stretch [27].…”

Section: Infrared Spectramentioning

confidence: 84%

See 1 more Smart Citation

Oxo/dioxo-vanadium(V) complexes with Schiff base ligands derived from 4-amino-5-mercapto-3-phenyl-1,2,4-triazole

Zabin

Abdelbaset

2016

Eur. J. Chem.

View full text Add to dashboard Cite

Vanadium complexes containing Schiff base ligands are of great importance and have numerous applications. A series of Schiff base ligands derived from 4-amino-5-mercapto-3phenyl-1,2,4-triazole and different aldehydes were synthesized and combined with ammonium metavanadate in 2:1 and 1:1 molar ration to yield oxo-and dioxo-vanadium(V) complexes NH4[VO(La-f)2] and NH4[VO2(Lg-h)2], respectively. The structure of the synthesized compounds was confirmed by elemental analysis, UV, IR, NMR, MS and TGA. Complexes with bidentate and tridentate ligands were expected to possess a distorted square-pyramidal structure. The ligands and their complexes have been examined for antimicrobial activity against six types of bacteria and one kind of fungus that widely distributed in Albaha region, Kingdom of Saudi Arabia. The results indicate that some of the complexes were active against C. albicans fungus when used as powder, and no sound activity were shown against any type of tested bacteria.

show abstract

Section: Infrared Spectramentioning

confidence: 73%

Section: Infrared Spectramentioning

confidence: 84%

Oxo/dioxo-vanadium(V) complexes with Schiff base ligands derived from 4-amino-5-mercapto-3-phenyl-1,2,4-triazole

Zabin

Abdelbaset

2016

Eur. J. Chem.

View full text Add to dashboard Cite

show abstract

“…The electronic spectrum of the olive green Ni(II) complex ( 2) exhibited an absorption band at 445 nm, which may be ascribed to the 3 A2g → 3 T1g(P) transition in an octahedral geometry [23]. As Nujol mulls, another band was observed at 694 nm, which may be ascribed to the 3 A2g → 3 T1g(F) electronic transition in an octahedral geometry [81].…”

Section: 22 Electronic Spectra and Magnetic Moment Measurementsmentioning

confidence: 99%

“…The coordinating behavior of the di-carbonyl compound; 4,6-diacetylresorcinol (2,4dihydroxy-5-acetylacetophenone) (DAR) has been studied [11][12][13][14][15][16]. In addition, some symmetrical and asymmetrical Schiff bases, hydrazones and other ligands [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] have been constructed from DAR.…”

Section: Introductionmentioning

confidence: 99%

Binuclear Co(II), Ni(II) and Cu(II) Complexes of a new Bis(tridentate) Hydrazone Ligand: Synthesis, Thermal, Spectroscopic, Biological, Molecular Docking and Theoretical Studies

Samy

2021

Preprint

View full text Add to dashboard Cite

A new hydrazone ligand; 4,6-bis(2-hydroxynaphthalen-1-yl)methyl-ene)hydrazono)ethyl)benzene-1,3-diol (H4L; DHNAPH) was synthesized by the reaction of 4,6-bis(1-hydrazonoethyl)benzene-1,3-diol (NH2DAR) with 2-hydroxy 1-naphthaldehyde. Co(II), Ni(II) and Cu(II)- complexes ([M2L(H2O)6].nH2O.mEtOH; M = Co, Ni or Cu, n = 0.5 or 1 and m = 0.5 or 0) of DHNAPH have been successfully synthesized. Characterization of DHNAPH and its complexes was performed by analytical, spectral (IR, mass, UV-Vis, 1H NMR and ESR), magnetic susceptibility, molar conductivity and thermal gravimetric analysis (TGA) techniques. The scanning electron microscopy (SEM) was used for detection of the morphology of DHNAPH and its Co- and Ni-complexes, which refers that the DHNAPH complexes are in the nano scale. The analytical data, magnetic moments and spectral studies recognized octahedral geometries for DHNAPH complexes. DHNAPH acts as a bis(dibasic triadentate) via (C=Nazomethine and 2 OH) with metal in complexes. The optimized structure of DHNAPH and its complexes has been done theoretically by Hyperchem program and structural parameters were linked with the IR experimental data. The activity of DHNAPH and its complexes against Hepatocellular carcinoma, fungi and bacteria has been tested. The new complexes are more active than DHNAPH and the highest antitumor activity was given by copper(II) complex. The DNA-binding of DHNAPH and Cu- DHNAPH has been investigated. Molecular docking studies showed that all the tested compounds show good binding score revealing good fitting in between the DNA strands. There is agreement between docking data and DNA binding results.

show abstract

“…Transition metal complexes with nitrogen, sulphur, or oxygen as ligand atoms were becoming more important because these Schiff bases can bind with various metal centers involving various coordination sites, allowing for the successful synthesis of metallic complexes with interesting stereochemistry [1,2]. Moreover, Sulphur and nitrogen-containing ligands and their transition metal complexes were employed as corrosion inhibitors [3,4], extreme pressure lubricant additives [5] and showed broad biological activity [6][7][8][9][10] due to the different ways in which they were bonded to metal ions. Heterocyclic compounds such as pyridine, 2,6-diaminopyridine, and related molecules are good ligands because of the presence of at least one ring nitrogen atom with a localized pair of electrons [11,12].…”

Section: Introductionmentioning

confidence: 99%

Structural Characterization, DFT Calculations, Metal Uptake, Fluorescence, Antimicrobial and Molecular Docking Studies of Novel Co(II) and Ni(II) Complexes with NNS Tridentate Schiff base Ligand

Ali

Nassar

Shehata

et al. 2022

Preprint

View full text Add to dashboard Cite

A new Schiff base ligand N2-((5-methylthiophen-2-yl) methylene) pyridine-2,6-diamine (L) was prepared by condensation of 5-Methyl-2-thiophenecarboxaldehyde and 2,6-diaminopyridine in ethanol in a molar ratio 1:1. The ligand and its complexes were characterized based on elemental analyses, molar conductance, magnetic moment, IR, MS, 1H NMR, solid reflectance, and thermal analysis (TG and DTG) techniques. The complexes were found to have the formulas [CoL(H2O) Cl2].H2O and [NiL(H2O)Cl2].2H2O. From FTIR spectral data, the coordination between the ligand L to the central metal ion was through its nitrogen of pyridyl and azomethine and sulfur of 2-thiophenecarboxaldehyde. The metal complexes were found to be nonelectrolyte. Octahedral geometries of the Co(II) and Ni(II) complexes were investigated from electronic and magnetic data. The kinetic analysis of the thermogravimetric data was performed by using the Coats-Redfern equation. The fluorescence properties of the ligand and its complexes in DMF were studied. The values of optical band gap energy (Eg) of the synthesized complexes suggested that these compounds could be used as semiconductors. The adsorption of Co2+ and Ni2+ in aqueous solutions on ligand under various conditions was studied. The maximum adsorption percentage of Co(II) and Ni(II) were found to be 68% and 65%, respectively. The Molecular docking studies were executed to consider the nature of binding and binding affinity of the synthesized compounds with the receptor of Bacillus subtilis (gram +ve bacteria) and Escherichia coli (gram –ve bacteria) (PDB ID: 1fj4). The ligand and its complexes were tested as antimicrobial agents.

show abstract

Binuclear transition metal complexes of bicompartmental SNO donor ligands: synthesis, characterization, and electrochemistry

Cited by 20 publications

References 26 publications

Oxo/dioxo-vanadium(V) complexes with Schiff base ligands derived from 4-amino-5-mercapto-3-phenyl-1,2,4-triazole

Oxo/dioxo-vanadium(V) complexes with Schiff base ligands derived from 4-amino-5-mercapto-3-phenyl-1,2,4-triazole

Binuclear Co(II), Ni(II) and Cu(II) Complexes of a new Bis(tridentate) Hydrazone Ligand: Synthesis, Thermal, Spectroscopic, Biological, Molecular Docking and Theoretical Studies

Structural Characterization, DFT Calculations, Metal Uptake, Fluorescence, Antimicrobial and Molecular Docking Studies of Novel Co(II) and Ni(II) Complexes with NNS Tridentate Schiff base Ligand

Contact Info

Product

Resources

About