Comparison of spectral and thermal properties and antibacterial activity of new binary and ternary complexes of Sm(III), Eu(III) and Gd(III) ions with N-phenylanthranilic acid and 1,10-phenanthroline

Zapała, Lidia; Kosińska, Małgorzata; Woźnicka, Elżbieta; Byczyński, Łukasz; Ciszkowicz, Ewa; Lecka-Szlachta, Katarzyna; Zapała, Wojciech; Chutkowski, Marcin

doi:10.1016/j.tca.2018.11.019

Cited by 26 publications

(6 citation statements)

References 51 publications

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“…It is important to note that all complexes show better fungicidal and bactericidal behavior than L due to extended conjugation, dispersing the π electron cloud over the entire ring which facilitates the lipophilicity of terbium (III) ions and thus penetrates the microbial cell membrane to the deeper extent and inhibits its growth [64,65]. Based on chelation theory, it can be concluded that all complexes are more potent for antimicrobial activities than that ligand [66]. Chelation theory states that the presence of coordinated ligands suppressed the polar nature of terbium (III) ion, which reinforces the penetration capability and lipophilic nature of complexes by covering microorganisms which improved the antimicrobial capability of complexes [67,68].…”

Section: Antimicrobial Activitiesmentioning

confidence: 99%

Augmentation of photophysical features and Judd–Ofelt analysis of extensively green glowing terbium (III) complexes with nitrogen donor ancillary ligands

Hooda

Taxak

Malik

et al. 2022

Photochem Photobiol Sci

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Six green glowing terbium (III) complexes were fabricated via grinding method utilizing a prime organic ligand (L) and nitrogen donor ancillary ligands. Characterization of synthesized complexes was accomplished through various spectroscopic techniques. The significant thermal stability was determined by thermogravimetric analysis while the energy bandgap and Urbach energy were investigated through diffused reflectance spectra of these complexes. The peak observed at 548 nm in emission spectra is responsible for the virescent color of these complexes. Color purity, decay time, quantum yield, and emission intensities of ternary complexes were significantly improved as compared to binary ones due to the synergistic effect of ancillary ligands. Judd-Ofelt parameters were determined by the NIR absorption spectrum, which claims the asymmetric environment around the terbium (III) ion. CCT values advocate the applicability of these complexes in green light-emitting materials as a cool light source. The biological assignments reveal the significance of these complexes as potent antioxidants and antimicrobial agents. The energy transfer process highlights the enhancement of luminescence in these complexes via the synergic effect of ligands. Our investigation portrays that these complexes can be employed in laser technology, display devices, semiconductors, biological fields, and optoelectronic devices.

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Section: Antimicrobial Activitiesmentioning

confidence: 99%

Augmentation of photophysical features and Judd–Ofelt analysis of extensively green glowing terbium (III) complexes with nitrogen donor ancillary ligands

Hooda

Taxak

Malik

et al. 2022

Photochem Photobiol Sci

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“…The antibacterial activity of fractions (1-10) was evaluated by determination of the minimum inhibitory concentration (MIC, µg/mL) using the micro-broth dilution method, as described before [85] and according to the Clinical and Laboratory Standards Institute (CSLI) guidelines for S. epidermidis antimicrobial susceptibility testing [86]. Briefly, each bacterial strain was incubated in 37 • C in New Brunswick Innova 40 Shaker (Eppendorf AG, Hamburg, Germany) until turbidity of 0.5 McFarland's standard (10 8 CFU/mL, colony-forming units per mL) was obtained.…”

Section: Determination Of Minimum Inhibitory Concentration (Mic)mentioning

confidence: 99%

Antimicrobial Activity of Protein Fraction from Naja ashei Venom against Staphylococcus epidermidis

et al. 2020

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One of the key problems of modern infectious disease medicine is the growing number of drug-resistant and multi-drug-resistant bacterial strains. For this reason, many studies are devoted to the search for highly active antimicrobial substances that could be used in therapy against bacterial infections. As it turns out, snake venoms are a rich source of proteins that exert a strong antibacterial effect, and therefore they have become an interesting research material. We analyzed Naja ashei venom for such antibacterial properties, and we found that a specific composition of proteins can act to eliminate individual bacterial cells, as well as the entire biofilm of Staphylococcus epidermidis. In general, we used ion exchange chromatography (IEX) to obtain 10 protein fractions with different levels of complexity, which were then tested against certified and clinical strains of S. epidermidis. One of the fractions (F2) showed exceptional antimicrobial effects both alone and in combination with antibiotics. The protein composition of the obtained fractions was determined using mass spectrometry techniques, indicating a high proportion of phospholipases A2, three-finger toxins, and L-amino acids oxidases in F2 fraction, which are most likely responsible for the unique properties of this fraction. Moreover, we were able to identify a new group of low abundant proteins containing the Ig-like domain that have not been previously described in snake venoms.

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“…Thermal analysis is widely used for studies of thermal degradation of molecules, especially for those that have therapeutic or biological properties and their metal complexes, to identify the thermal stability, stoichiometry, degree of hydration of the compounds and polymorphism studies. In addition, associated with FTIR and XRPD techniques, it is possible to know the degree of crystallinity of synthesized compounds, the coordinating sites of the drug and even propose a mechanism of degradation [18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Study of the thermal behavior in oxidative and pyrolysis conditions of some transition metals complexes with Lornoxicam as ligand using the techniques: TG-DSC, DSC, HSM and EGA (TG-FTIR and HSM-MS)

et al. 2019

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Lornoxicam metal complexes [M(Lor)2(OH2)2]•nH2O, where M represents the bivalent transition metals (Mn(II) to Zn(II)), Lor is Lornoxicam ligand and n = 2.0 or 2.5 were synthesized. The compounds were characterized by elemental analysis (EA), powder X-ray diffraction (PXRD), infrared spectroscopy (FTIR), simultaneous thermogravimetry and differential scanning calorimetry (TG-DSC) under oxidizing and pyrolysis conditions, differential scanning calorimetry (DSC), hot-stage microscopy (HSM) and evolved gas analysis (EGA) by coupled hot-stage microscopy (HSM-MS) and Fourier transform infrared (TG−FTIR). Regardless of the atmosphere, the thermal stability and thermal behavior up to the first two mass loss steps of the anhydrous compound were similar, only differing significantly in the last steps. The main gaseous products released * Corresponding author.

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Comparison of spectral and thermal properties and antibacterial activity of new binary and ternary complexes of Sm(III), Eu(III) and Gd(III) ions with N-phenylanthranilic acid and 1,10-phenanthroline

Cited by 26 publications

References 51 publications

Augmentation of photophysical features and Judd–Ofelt analysis of extensively green glowing terbium (III) complexes with nitrogen donor ancillary ligands

Augmentation of photophysical features and Judd–Ofelt analysis of extensively green glowing terbium (III) complexes with nitrogen donor ancillary ligands

Antimicrobial Activity of Protein Fraction from Naja ashei Venom against Staphylococcus epidermidis

Study of the thermal behavior in oxidative and pyrolysis conditions of some transition metals complexes with Lornoxicam as ligand using the techniques: TG-DSC, DSC, HSM and EGA (TG-FTIR and HSM-MS)

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