Synthesis, structural characterization and microbial activities of mixed ligand copper(II) complexes of 2,2′-bipyridine and acetylacetonate

Onawumi, O. O. E.; Odunola, O. A.; Suresh, Eringathodi; Paul, Parimal

doi:10.1016/j.inoche.2011.06.025

Cited by 25 publications

(20 citation statements)

References 17 publications

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“…. The  value of complex-4 is within this range in both solvents, which reinforces a structural arrangement of a dimeric square planar geometry in solution [16,17,[22][23][24].…”

Section: Electronic Spectrasupporting

confidence: 67%

Synthesis, Characterisation and Antimicrobial Activity of Dimeric and Monomeric Copper(II)-Schiff base Complexes

Santos¹,

Oliveira²,

Maia³

2017

IOSR JAC

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“…. The  value of complex-4 is within this range in both solvents, which reinforces a structural arrangement of a dimeric square planar geometry in solution [16,17,[22][23][24].…”

Section: Electronic Spectrasupporting

confidence: 67%

Synthesis, Characterisation and Antimicrobial Activity of Dimeric and Monomeric Copper(II)-Schiff base Complexes

Santos¹,

Oliveira²,

Maia³

2017

IOSR JAC

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“…Preliminary studies of the antibacterial and antifungal actions of Casiopeínas® were performed by Onawumi et al [18] using Escherichia coli, Pseudomonas aeruginosa, Candida albicans , and other microorganisms. Recently, Becco et al [19] explored the in vitro anti- Trypanosoma cruzi activity of these compounds, and found that Casiopeínas® have shown similar IC 50 to that of the reference drug nifurtimox.…”

Section: Introductionmentioning

confidence: 99%

Potential of Casiopeínas® Copper Complexes and Antituberculosis Drug Combination against <b><i>Mycobacterium tuberculosis</i></b>

Barbosa¹,

Caleffi-Ferracioli

Leite

et al. 2016

Chemotherapy

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New compounds with antituberculosis activity and their combination with classic drugs have been evaluated to determine possible interactions and antagonism. The aim of this study was to evaluate the in vitro activity of Casiopeínas® copper-based compounds (CasIIIia, CasIIIEa, and CasIIgly) alone and combined with isoniazid (INH), rifampicin, or ethambutol (EMB) against resistant and susceptible Mycobacterium tuberculosis. Seventeen clinical M. tuberculosis isolates (5 multi-drug resistant and 2 resistant to INH and/or EMB) were subjected to determination of the minimal inhibitory concentration (MIC) by the resazurin microtiter assay and combination assessment by the resazurin drug combination microtiter assay. The Casiopeínas® alone showed a remarkable effect against resistant isolates with MIC values from 0.78 to 12.50 μg/ml. Furthermore, a synergistic effect mainly with EMB is shown for both resistant and susceptible clinical isolates. Casiopeínas® are promising candidates for future investigation into the development of antituberculosis drugs, being one of the first examples of essential metal-based drugs used in this field.

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“…The pollutants not only physically interact with the membrane surface but also chemically degrade the membrane material [29]. Various classes of antibacterial materials have been investigated which include metal oxides [30], elemental-based nanocomposites [31], polymeric-based nanocomposites [32], ligand complexes [33], surfactants [34], antimicrobial peptides [35], plant extracts [36], aquatic extracts [37] and fungus extracts [38]. Amongst all the bactericidal agents, silver has long been recognized for its potent antimicrobial applications and can be used on its own [39] or in the form of nanocomposites for enhanced stability [29,40,41].…”

Section: Introductionmentioning

confidence: 99%

Facile preparation of graphene-based chitosan films: Enhanced thermal, mechanical and antibacterial properties

Lim

Huang

Loo

2012

Journal of Non-Crystalline Solids

138

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Chitosan is considered a model polymer because of its excellent biocompatibility, biodegradability, antibacterial property and metal binding ability. Despite the favorable properties, the poor mechanical strength and the loss of structural integrity limits the applications of chitosan. Graphene's intrinsic low weight with excellent thermal stability makes it an ideal filler for reinforcing polymers. In this work, we prepared graphene oxide (GO) via Hummer's method and simplified Hummer's method using graphite powder and graphite flakes as starting materials, respectively. The GO obtained using Hummer's method and simplified Hummer's method had a small area of less than 50 μm 2 and a large area of about 7000 μm 2 , respectively. The small area GO and large area GO were reduced by sodium hydroxide, in which the reduced GO (rGO) with small area and large area were incorporated into a chitosan matrix, respectively, using a simplistic drop-casting technique to produce a thin film. Glass transition temperature (T g ) and mechanical strength of chitosan/large area rGO at concentrations of 0.3, 0.6 and 0.9 wt.% of GO were found to be better than chitosan/small area rGO. We also investigated the T g and mechanical strength between chitosan/small area GO and chitosan/small area rGO, where we discovered that the former had better thermal and tensile properties. By comparing the T g and mechanical strength of chitosan/small area GO against chitosan/large area GO, we found that the latter displayed superior thermal and tensile properties. Antibacterial tests were performed on the graphene-based chitosan composites and their ability to act as bactericide was manifested in the retardation of the growth of Pseudomonas aeruginosa. These composite materials with excellent thermal, tensile and antimicrobial properties find real-life applications in the physical, chemical, mechanical, electrical and bioengineering fields.

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Synthesis, structural characterization and microbial activities of mixed ligand copper(II) complexes of 2,2′-bipyridine and acetylacetonate

Cited by 25 publications

References 17 publications

Synthesis, Characterisation and Antimicrobial Activity of Dimeric and Monomeric Copper(II)-Schiff base Complexes

Synthesis, Characterisation and Antimicrobial Activity of Dimeric and Monomeric Copper(II)-Schiff base Complexes

Potential of Casiopeínas® Copper Complexes and Antituberculosis Drug Combination against <b><i>Mycobacterium tuberculosis</i></b>

Facile preparation of graphene-based chitosan films: Enhanced thermal, mechanical and antibacterial properties

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