Synthesis, characterization, DFT and biological studies of Fe(II), Cu(II), and Zn(II) complexes of keto-imine chelators

Chioma, Festus; Ezugwu, Chizoba I.; Okpareke, Obinna C.

doi:10.1016/j.ica.2022.121255

Cited by 4 publications

(4 citation statements)

References 48 publications

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“…A broad absorption band at 3337 cmG 1 was ascribed to intra-molecular H-bonding vibration (O-H), which was frequently observed in imine chelators containing hydroxyl groups 28,29 . The detected OH bending vibration at 942 cmG 1 in the chelator shifted to a higher wavenumber in the chelates, demonstrating the existence of H 2 O molecules 30,31 . The weak absorption bands found in the chelates of…”

Section: Ft-ir Spectramentioning

confidence: 91%

“…The Fe(II) chelates are found in coordination sites that are near octahedral and tetrahedral symmetry 39 . The [Fe(L) 2 (H 2 O) 2 ] chelate demonstrated an n6π* transition at 29851 cmG 1 , with large bands owing to Jahn Teller effects at 16077 and 14684 cmG 1 attributable to the 5 T 2 g6 5 Eg transition and compatible with a 6-coordinate geometry 31 . High spin Co(II) chelates with 4 T 2 (t 25 e 2 ) and 2 E(t 26 e 1 ) configurations frequently exhibit spin crossover equilibrium 30 .…”

Section: Ft-ir Spectramentioning

confidence: 97%

“…An increase in DM produces corresponding a rise in the efficiency of the CI 17 . Looking through Table 6, the calculated DM revealed that all studied complexes except [Mn(L) 2 (H 2 O) 2 ] (with low DM), possess the tendency to interact with high DM species such as biological systems due to high DM character 31 . The A disclosures entire energy needed for a chelator to become an electron acceptor whereas the I depicts the strength of a chelator to become an electron donor 49,51 .…”

Section: As Verified Inmentioning

confidence: 99%

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Corrosion Inhibition and Antimicrobial Studies of Imine Chelator and its M(II) Chelates: Synthesis and Characterizations

Wodi,

Don-Lawson,

Festus

2023

Singapore J. Sci. Res

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Background and Objective: Organic molecules with non-carbon atoms, have found applications in many fields of life science and technology. They constitute the vast majority of the molecules involved in the operations of man in exerting control over nature. Thus, studies of some bivalent metal chelates of bidentate imine-chelator (LH) acquired from 2-hydroxyl-1-naphthaldehyde (2-HNA) and 2-amino-6ethoxybenzothiazole (2-AEBT). Materials and Methods: The synthesis, characterization and corrosion inhibition studies were carried out via facile reactions, analytical spectral, theoretical and inhibitive methods reported in our previous works. The antimicrobial properties of the synthesized compounds were tested in vitro against P. mirabilis, E. coli, S. aureus, K. oxytoca, S. Epidermidis, S. Pneumoniea, A. niger, A. flavus and Fuserium sp., strains. Results: The vibrational spectra of LH revealed a band at 1622 cmG 1 , which was ascribed to the -C=N-stretching vibration which appeared at lower frequencies in the chelates' spectra indicating chelation. Jobs' method of continuous variation suggests 1:2 metal to ligand ratio. The effect of LH and its chelates on acid deterioration of mild steel (ms) was visible indicating that LH had considerable corrosion inhibition (CI) performance in contrast to corrosion of ms in a 1M HCl solution. The premeditated zinc complex had the best antibacterial activity while the manganese complex showed enormously fine antifungal actions against the screened microbes with inhibitory zones of 15.0 and 26.5 mm separately. Conclusion: The synthesized compounds had the highest antibacterial and antifungal actions against Streptococcus sp., A. niger. The absorption of the compounds on the metal surface was proven by the Density Functional Theory (DFT) calculations showing they are potential corrosion inhibitors for steel protection.

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Section: Ft-ir Spectramentioning

confidence: 91%

Section: Ft-ir Spectramentioning

confidence: 97%

Section: As Verified Inmentioning

confidence: 99%

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Corrosion Inhibition and Antimicrobial Studies of Imine Chelator and its M(II) Chelates: Synthesis and Characterizations

Wodi,

Don-Lawson,

Festus

2023

Singapore J. Sci. Res

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“…The graph plots percentage capture efficiency on the y-axis and concentration (ug/ml) on the x-axis. The scavenging capacities of complexes were compared with vitamin C as a standard 33,34 . Metal complexes showed enhanced activity as radical scavengers compared to ascorbic acid.…”

Section: Candida Albicans Antioxidant Activity (Radical Scavenging Ac...mentioning

confidence: 99%

Diamagnetic Zn(II) and Hg(II) Complexes with Fluconazole: Synthesis, Spectral Characterization and Biological Investigation

Keerthika,

Balasubramaniyan,

Govindharaju

2023

Biosci., Biotech. Res. Asia

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In order to create new mononuclear diamagnetic complexes (M = Zn (II) and Hg (II)), fluconazole and thiocyanate ion ligands were utilized. Physicochemical and spectroscopic approaches were used to describe the synthesized metal complexes. The spectral data show that the fluconazole served as a bidentate ligand and linked to metal ions via the nitrogen of the imine group, the thiocyanate ion connected to metal ions through nitrogen. The antibacterial capacities of the strains of Candida albicans (MTCC 183) for fungi and Escherichia coli (MTCC 732) for bacteria were assessed using the disc diffusion method. The results showed that Zn (II) and Hg (II) complexes have much stronger antibacterial activity than pure ligands because of metal chelation. The complexes interactions with the stable free radical DPPH are measured. The free radical scavenging activities of the complexes and the ligand have been determined by measuring their interaction with the stable free radical DPPH. The complexes have larger antioxidant activity as compared to the ligands.

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Synthesis and characterization of tannic acid–copper complex: A promising anticholinesterase drug

Ferreira,

Campelo,

Alves

et al. 2024

Polyhedron

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Synthesis, characterization, DFT and biological studies of Fe(II), Cu(II), and Zn(II) complexes of keto-imine chelators

Cited by 4 publications

References 48 publications

Corrosion Inhibition and Antimicrobial Studies of Imine Chelator and its M(II) Chelates: Synthesis and Characterizations

Corrosion Inhibition and Antimicrobial Studies of Imine Chelator and its M(II) Chelates: Synthesis and Characterizations

Diamagnetic Zn(II) and Hg(II) Complexes with Fluconazole: Synthesis, Spectral Characterization and Biological Investigation

Synthesis and characterization of tannic acid–copper complex: A promising anticholinesterase drug

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