Synthesis, Optimization, Characterization and Antimicrobial Studies of Cu(II) and Co(III) Complexes of Bis(2,2/-methylylidenephenol)diaminoethane

Nworie, Felix Sunday; Nwabue, F. I.

doi:10.19261/cjm.2017.392

Cited by 2 publications

(3 citation statements)

References 26 publications

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“…The competition between the Cd(II) ions in solution and the hydronium ions formed at pH 2-4 resulted in instability of the cationic complex formed and consequent regress in the amount of Cd(II) adsorbed (28). At pH 5, increase in the competition between the Cd(II) ions and the hydronium ions in solution disappears and stable cationic complex is formed leading to increase in the amount of Cd(II) removed.…”

Section: Possible Mechanism Of Cd(ii) Chelation and Removal Using The Functionalized Carbon Dotmentioning

confidence: 99%

Hydrothermal Synthesis of Fluorescent Schiff Base Functionalized Carbon Dot Composite for The Removal Of Cd(II) Ions From Aqueous Solution: Equilibrium and Kinetic Studies.

Nworie

Ebunoha

2021

Journal of the Turkish Chemical Society Section A: Chemistry

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The search for nanoparticle metal chelator biomarker has been on the rise in recent years. In this study, bis(salicylidene)ethylenediamine (SALEN) functionalized carbon dot derived from waste banana peels was synthesized using facile hydrothermal technique and the optical biomarker and adsorption properties of the highly fluorescent red nanomaterial was studied. The carbon dot and its functionalized counterpart were characterized using FTIR, SEM/EDX, and UV-Visible spectrophotometry. Evaluation of the optical properties of the yellowish brown carbon dot and reddish highly luminescent functionalized carbon dot indicated band gap energy values of 1.85 and 2.04 eV, respectively. Extraneous variables such as effect of initial metal ion concentration, pH, and contact time were studied in the batch extraction process for the sorption of Cd(II) ions from aqueous solution. The sorption of Cd(II) ion was observed to be highest at pH 5 with 99.3 % removal efficiency. The adsorption isotherm and kinetic models indicated interplay of physisorption and chemisorption processes. The mechanism for the chelation of Cd(II) ions onto the surface of the functionalized carbon dot was mainly governed by inner sphere chelation and ion exchange. Reusability of the material was evaluated using adsorption-desorption experiments. Results of the study indicated the potential of the functionalized carbon dot as (i) semiconductor materials with strong photoluminescence at the visible region which could be used as environmental biomarker and as sensor, and (ii) effective, efficient and low cost adsorbent for remediating Cd(II) ions contaminated environment.

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Section: Possible Mechanism Of Cd(ii) Chelation and Removal Using The Functionalized Carbon Dotmentioning

confidence: 99%

Hydrothermal Synthesis of Fluorescent Schiff Base Functionalized Carbon Dot Composite for The Removal Of Cd(II) Ions From Aqueous Solution: Equilibrium and Kinetic Studies.

Nworie

Ebunoha

2021

Journal of the Turkish Chemical Society Section A: Chemistry

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“…Ethylenediamine (22.475 g) was carefully added with stirring to 91.336 g of salicyladehyde in a 500 cm 3 beaker. At initial stage, a yellow hot mixture was formed which translated to golden yellow cake on crystallization (Nworie and Nwabue 2017). Recrystallized of the product was effected with carbon tetrachloride to yield golden yellow crystals (64.45 % yield, M.P 121±1 °C).…”

Section: Synthesis Of Bis(salicylidene)ethylenediamine (Salen)mentioning

confidence: 99%

“…This observation could be explained by chelation theory as chelation increases the lipophilicity and denaturation of the cell wall of the micro-organism (Nworie et al 2018). Similarly, the bioactivity increased due to ligation of the micro-organism cell wall bonds with the -OH group of the immobilized biomaterial and exchange of ions at the -C=O interfaces of the impregnated biochar and bacterial cell well thereby increasing denaturation followed by cell death (Nworie and Nwabue 2017). There is perceived free radical generation when the Schiff base (SALEN or ACACEN) impregnated biochar was intercalatively co-ordinated to the cell of the micro-organism enhancing cell wall permeation, magnifying intracellular ATP leakage and quantitatively disrupting the activity functionality of DNA and RNA of the cells inducing cell death a confirmation of increased bactericidal activity The antimicrobial activity of SALEN immobilized.…”

Section: Antimicrobial Evaluation Of Naked and Schiff Base/biochar Compositesmentioning

confidence: 99%

Synthesis of biochar conjugated Schiff base composites and their enhanced antimicrobial activity against five pathogenic organisms

Nworie

Nwabue²,

Oti³

et al. 2020

Nova Biotechnol. Chim.

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The search for antimicrobial drug of high bio-efficacy not prone to multiple microbial resistance has been on the rise in recent time. This study focused on the preparation, characterization and antimicrobial evaluation of Schiff functionalized HNO3 activated plantain peel and rice husk biochar against five pathogenic bacteria. The activated rice husk and plantain peel biochar were characterized using Braunauer-Emmett-Teller, X-ray diffraction and Fourier transform infra-red spectroscopy. Based on the result, the activated rice husk and plantain peel biochar were amorphous and crystalline respectively with pore surface area and pore size for activated rice husk and plantain peel biochar as 9.369 and 27.32 (m2.g-1) and 8.790 and 16.65 (cc.g-1), respectively. The Fourier transform infra-red spectroscopy result indicated bonds, such as –OH, C=O and –N-H, where actual chelation and electrostatic attraction mechanism are prevalent responsible for antimicrobial potency. The cell bioactivity was hampered due to permeation of the biocidal agents, cell membrane disruption and generation of reactive oxygen species enhanced by conjugation of Schiff base based biochar to the microbial cell wall leading to death of microbes. The ease of Schiff base release and reusability of the nanocomposite favors the product as an efficient, low cost, effective and promising nanocomposite for decontamination of bacteria infested media.

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Synthesis, Optimization, Characterization and Antimicrobial Studies of Cu(II) and Co(III) Complexes of Bis(2,2/-methylylidenephenol)diaminoethane

Cited by 2 publications

References 26 publications

Hydrothermal Synthesis of Fluorescent Schiff Base Functionalized Carbon Dot Composite for The Removal Of Cd(II) Ions From Aqueous Solution: Equilibrium and Kinetic Studies.

Hydrothermal Synthesis of Fluorescent Schiff Base Functionalized Carbon Dot Composite for The Removal Of Cd(II) Ions From Aqueous Solution: Equilibrium and Kinetic Studies.

Synthesis of biochar conjugated Schiff base composites and their enhanced antimicrobial activity against five pathogenic organisms

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