Syntheses, characterization, and antimicrobial studies of Ni(II), Cu(II), and Co(III) complexes with an N-pendant azamacrocyclic chelator

Dey, Lucky; Rabi, Saswata; Palit, Debashis; Hazari, Saroj K. S.; Begum, Zinnat A.; Rahman, Ismail M.M.; Roy, Tapashi G.

doi:10.1016/j.molstruc.2021.130579

Cited by 16 publications

(6 citation statements)

References 45 publications

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“…After 20 min, a 6 mm well got cut at the center of agar plates and each well were lled with prepared samples of synthesized complexes, keeping solvent media having Gentamycin as + ive control and solvent media alone as -ive control. Each plate was analyzed for measuring the zone of inhibition after 20 hr of incubation at 37 C and for fungus, zone of inhibition was measured after incubation for 48 hr at 28 C [25][26][27].…”

Section: Biological Activitymentioning

confidence: 99%

Phenyl conjugation effect on Fe3+/2+ formal potential of FeN4-macryclic complex

Ravinder

Das

Kumar

2023

J Incl Phenom Macrocycl Chem

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The monitoring of shifting of the redox potential of macrocyclic complexes towards anodic or cathodic regions, which acts as a mediator in many electrocatalytic events, is made possible by inserting electron donating or withholding groups into their frameworks. Herein, using a template strategy, two [14]membered N 4 -macrocyclic complexes (denoted as complex A and complex B) with similar molecular cores but different phenyl moieties were prepared and characterized using multiple characterization techniques. The characterization results suggested a saddle-shaped geometry for these complexes, which might be due to the steric repulsions between the benzenoid and amidic moieties on the macrocyclic framework, as also supported by theoretical computations. Further, to investigate the electrochemical behaviors of these complexes, cyclic voltammetry was used and found that the Fe 3+/2+ redox potential was systematically shifted in anodic direction with the increment of phenyl moieties on the [14]-membered N 4 -macrocyclic core. DFT calculations indicated the down-shifting in the most occupied molecular orbital due to the increased phenyl conjugation, which could be correlated with the shifting of Fe 3+/2+ redox potential. Biological evaluation of these complexes has also been carried out.

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Section: Biological Activitymentioning

confidence: 99%

Phenyl conjugation effect on Fe3+/2+ formal potential of FeN4-macryclic complex

Ravinder

Das

Kumar

2023

J Incl Phenom Macrocycl Chem

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“…Antimicrobial efficacy: The antibacterial effectiveness of both the noncyclic ligands and the complexes of L II was evaluated against four selected Gram-positive and six Gramnegative bacteria, utilizing the established methodology outlined in the literature [1][2][3][4][5][6]. Additionally, the antifungal properties of all the compounds were assessed, employing the approach previously described elsewhere [4].…”

Section: Synthesis Of Ligandsmentioning

confidence: 99%

“…The field of coordination chemistry continually motivates us to create novel ligands and investigate their compatibility and complex-forming abilities with various metal ions. As per previous studies, several macrocyclic ligands and their derivatives have been successfully synthesized using different ketones and amines [1][2][3][4][5]. Continuing the research, designing new macrocycles has been attempted by altering the initial ketones (acetophenone, benzoylacetone or benzophenone) and amines (ethylenediamine or 1,3-diaminopropane).…”

Section: Introductionmentioning

confidence: 97%

“…Previous studies showed that Cu(II), Ni(II), Co(II) and Co(III) complexes derived from macrocyclic ligands with analogous starting materials possess potent antimicrobial properties [1][2][3][4][5][6]. Therefore, the antimicrobial effectiveness of the noncyclic ligands and the newly synthesized Cu(II), Ni(II), Co(II), and Co(III) complexes of L II have been investigated.…”

Section: Introductionmentioning

confidence: 99%

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Noncyclic Diaza Ligands and Their Metal Complexes: Synthesis, Characterization, and Biological Studies

Sarker,

Chakraborty,

Rabi

et al. 2023

ajc

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Condensation reactions involving various ketones and amines formed noncyclic ligands denoted as LI, LII, LIII, and LIV. Ethylenediamine, when reacted with acetophenone, benzoylacetone (in the presence of 70% HClO4), and benzophenone, resulted in the following noncyclic ligands: (E,E)-N,N-bis(1-phenylethylidene)ethylenediamine (LI), bis(1-3-hydroxy-3-phenylbut-2-ene-ylidene) (LII) and (E,E)-N,N-bis(1,1-diphenylmethylidene)ethylenediamine (LIII), respectively. The reaction of benzophenone with 1,3-diaminopropane in a 1:1 ratio in a methanolic solution also led to the synthesis of a noncyclic ligand, (E,E)-N,N-bis(1,1-diphenylmethylidene)propylenediamine (LIV). All the synthesized noncyclic ligands, except LII, undergo decomposition during complexation, reverting to the initial ketones and amines. In contrast, LII exhibits remarkable stability and can form square planar complexes with Ni(II), Cu(II), and Co(II) salts. Additionally, the Co(II) complex can convert into a six-coordinated Co(III) complex, [CoLII(H2O)2](NCS), when it reacts with KNCS. All these ligands and derived metal complexes were characterized, and their antimicrobial properties were evaluated against the selected fungi and bacteria.

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“…The mechanism has been investigated for several years, and research has been focused on the differences in metal ions and their binding to extractants . For example, it was speculated that differences in the electronic configurations of Ni and Co caused a different coordination between the metal and the extractant . Another opinion was that the selectivity of these metals is mainly attributable to the extractants.…”

Section: Introductionmentioning

confidence: 99%

Inhibition Role of Solvation on the Selective Extraction of Co(II): Toward Eco-Friendly Separation of Ni and Co

Yuan

Wen

Ning

et al. 2022

ACS Sustainable Chem. Eng.

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Ternary cathodes account for more than half of the market share for lithium-ion battery cathodes, and recycling draws considerable attention. The traditional extraction process used to separate and recover Co and Ni from spent ternary cathode leachates produces a large amount of saline wastewater; thus, a green method is urgently needed. In this work, we underscore the crucial role played by metal solvation during extraction, and this provides a new perspective for achieving green separation. The extraction mechanism can be described as follows: metal cations M 2+ (M−Ni and Co) generate stable hydrated ions M(H 2 O) 6 2+ upon solvation. However, Ni(H 2 O) 6 2+ and Co(H 2 O) 6 2+ exhibit different activities in reactions with acidic extractants (HA) and form different complexes, NiA 2 •2H 2 O and CoA 2 , respectively.Correspondingly, the coordinated water increases the electron density and steric hindrance of the center metal ions and thus inhibits the subsequent extraction. Therefore, a means of reducing solvation (adding lactic acid) was developed, and this approach exhibited good performance. The separation factor was improved by a factor of 192. These results open a new avenue for high-performance selective extraction of Co, which features a green recovery process and is suitable for future use in industrial production.

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Syntheses, characterization, and antimicrobial studies of Ni(II), Cu(II), and Co(III) complexes with an N-pendant azamacrocyclic chelator

Cited by 16 publications

References 45 publications

Phenyl conjugation effect on Fe3+/2+ formal potential of FeN4-macryclic complex

Phenyl conjugation effect on Fe3+/2+ formal potential of FeN4-macryclic complex

Noncyclic Diaza Ligands and Their Metal Complexes: Synthesis, Characterization, and Biological Studies

Inhibition Role of Solvation on the Selective Extraction of Co(II): Toward Eco-Friendly Separation of Ni and Co

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