Synthesis, Characterization and Comparative Thermal degradation study of Co(II), Ni(ΙΙ) and Cu(II) complexes with Asparagine and Urea as mixed ligands

Jamil, Yasmin M.S.; Al-Maqtari, Maher Ali; Al-Azab, Fathi M.; Al-Qadasy, Mohammed Kassem; Al-Gaadbi, Amani A.

doi:10.26850/1678-4618eqj.v43.4.2018.p11-24

Cited by 5 publications

(1 citation statement)

References 28 publications

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“…The Co ΙΙ complex is hexa-coordintion suggested (structure 1). This is based on the appearance of 14705 cm -1 and 16129 cm -1 in the spectra (Table 5 and Figure 5), which are attributed to the 4 T1g→ 4 A2g(ν2) and 4 T1g→ 4 T1g(ν3) transitions, respectively [33] [34]. The Co ΙΙ complex has a magnetic moment of 4.7 B.M, which is within the range described for a high-spin octahedral geometry around the Co ΙΙ ion [35], however the spectra of the third band assigned to ν1 cannot be observed due to the instrument's limited range (400-1000 nm).…”

Section: Magnetic and Electronic Spectral Studies Of The Ligand And I...mentioning

confidence: 93%

Synthesis and Spectroscopic methods on the complexation ofCoII, NiII and CuII

Jamil¹

2023

jast

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The Ligand was synthesized by condensation of Indol 3-hydroxy aldehyde, Glycine and Hydrazine hydrate. The reaction of the ligand with ions (CoII, NiII and CuII ions) yielded complexes, these compounds were characterized by physical and spectroscopic techniques. The conductivity showed a non-electrolytic nature for these compounds. The elemental analysis indicated the ligand to metal ratio as 1:1 with general molecular formula M(L)(H2O)nCl2 (L=ligand; M=metal ions. IR data showed the ligand coordinated to the metal ion via azomethine nitrogen and amine of hydrazide in addition to the amine of indol ring with CuΙΙ. The spectral and magnetic studies of the complexes showed that octahedral geometry for CoΙΙ and NiΙΙ while for CuΙΙ distorted octahedral geometry. The particle size and strain of these compounds have been discussed using X-ray diffraction. The antioxidant study for ligand proved to be a good antioxidant. The compounds have been evaluated for their antimicrobial activity against various organisms.

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Section: Magnetic and Electronic Spectral Studies Of The Ligand And I...mentioning

confidence: 93%

Synthesis and Spectroscopic methods on the complexation ofCoII, NiII and CuII

Jamil¹

2023

jast

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Assembly of Metal–Phenolic Networks on Water‐Soluble Substrates in Nonaqueous Media

Mazaheri

Zavabeti

Spoljaric

et al. 2022

Adv Funct Materials

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Interfacial modular assemblies of eco‐friendly metal–phenolic networks (MPNs) are of interest for surface and materials engineering. To date, most MPNs are assembled on water‐stable substrates; however, the self‐assembly of MPNs on highly water‐soluble substrates remains unexplored. Herein, a versatile approach is reported to engineer thickness‐tunable coatings (2–25 µm) on a water‐soluble substrate (i.e., urea) via the self‐assembly of MPNs in a nonaqueous solvent (i.e., acetonitrile). The coordination‐driven assembly of the MPN coatings in the nonaqueous solvent is distinct from that in aqueous systems, as the assembly is only achieved following the addition of urea granules into the iron–tannin solution. The coating occurs relatively rapidly (5–60 min), generating micrometer‐thick coatings from the adsorption of FeIII–TA complexes and micrometer‐sized FeIII–TA particles formed in solution. The straightforward nature of the present fabrication method in generating thick and robust coatings with high stability in nonaqueous environments (including at 60 °C) coupled with the broad range of available naturally abundant polyphenol–metal ion combinations expand the applicability of MPNs as coatings for water‐soluble materials, thus providing new opportunities for their broader application in a range of industrial processes and applications.

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Two novel Cu (II) levofloxacin complexes with different bioactive nitrogen‐based ligands; single‐crystal X‐ray and various biological activities determinations

Mubarak

Ali

Metani

2021

Applied Organom Chemis

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Two new copper (II) complexes with the third generation quinolone antibacterial agent levofloxacin, 2‐aminopyridine and 2,2′‐bipyridine nitrogen‐based ligands with the following molecular structures [Cu (levo)2(2‐ampy)].6.25H2O (1) and [Cu (levo)(H2O)(2,2‐bipy)](NO3).2.5H2O (2) were synthesized. The complexes were characterized by spectroscopic methods and others. The crystal structure of complex 1 revealed that the Cu (II) cation is coordinated to two bidentate chelating levofloxacinato ligands, and one monodentate 2‐ampy ligand in the axial position forming a slightly distorted square pyramidal geometry. The mononuclear cationic complex 2 was determined in the triclinic crystal system and the chiral space group P1 with four molecules per unit cell in which the Cu (II) cation is coordinated to one bidentate chelating levofloxacinato ligand, one bidentate 2,2‐bipy, and one water molecule in a distorted square pyramidal geometry. In vitro antibacterial activities for the complexes and their parent ligands against four gram‐negative bacteria (Proteus mirabilis, Escherichia coli, Pseudomonas aeruginosa, and Klebsiella pneumonia) and four gram‐positive bacteria (Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis, and Enterococcus faecalis) using the agar diffusion method have been determined with inhibition zone diameter (IZD) values between 29 and 46 mm. In addition, the minimum inhibition concentration (MIC) and the minimum bactericidal concentration (MBC) have been investigated. The MIC results of complexes 1 and 2 showed significant antibacterial activities against the P. mirabilis and B. subtilis than levofloxacin.

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Synthesis, Characterization and Comparative Thermal degradation study of Co(II), Ni(ΙΙ) and Cu(II) complexes with Asparagine and Urea as mixed ligands

Cited by 5 publications

References 28 publications

Synthesis and Spectroscopic methods on the complexation ofCoII, NiII and CuII

Synthesis and Spectroscopic methods on the complexation ofCoII, NiII and CuII

Assembly of Metal–Phenolic Networks on Water‐Soluble Substrates in Nonaqueous Media

Two novel Cu (II) levofloxacin complexes with different bioactive nitrogen‐based ligands; single‐crystal X‐ray and various biological activities determinations

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