Investigation of thermal stability, spectral, magnetic, and antimicrobial behavior for new complexes of Ni(II), Cu(II), and Zn(II) with a bismacrocyclic ligand

Bucur, Cristina; Korošec, Romana Cerc; Badea, Mihaela; Calu, Larisa; Chifiriuc, Mariana Carmen; Grecu, Maria Nicoleta; Stănică, Nicolae; Marinescu, Dana; Olar, Rodica

doi:10.1007/s10973-012-2912-3

Cited by 6 publications

(2 citation statements)

References 29 publications

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“…Exothermic peaks observed in the 290-395°C temperature range are probably due to both endothermic and exothermic reactions that occur simultaneously. These decomposition processes generate H 2 O, SO 2 CO 2 , and CO in the evolved gaseous products [24]. The FTIR spectra show characteristic absorption bands at 2,358, 2,320 cm -1 , and 669 cm -1 related to stretching and deformations vibrations of carbon dioxide.…”

Section: Resultsmentioning

confidence: 99%

New sulfonic derivatives of quercetin as complexing reagents: synthesis, spectral, and thermal characterization

Woźnicka

Pieniążek

Zapała

et al. 2014

J Therm Anal Calorim

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The synthesis conditions of quercetin-8-sulfonic acid and sodium salt of sulfonated quercetin were determined. The molecular formulae of obtained compounds are: C 15 H 10 O 10 SÁ4H 2 O and C 15 H 9 O 10 SNaÁ4H 2 O. On the basis of spectral methods UV-Vis, IR, and 1 H NMR it was stated that the sulfonation of quercetin occurs at 8-C position of the A ring. The complexing properties of Na-QSA-8 were confirmed by synthesis of a solid complex with Fe(II) ions. The NaQSA-8 formed a complex with Fe(II) ions at pH 5 with the metal excess (c M :c L = 7:1). The chelation site was analyzed using spectroscopy methods. It was found that chelation of the metal ions occurs at the 4C=O, 3-OH and 3 0 -OH, and 4 0 -OH sites of the molecule NaQSA-8. Thermal decomposition of the compounds was carried out in air and nitrogen gas carries. The TG-FTIR-MS technique was employed to study decomposition pathway. The dehydration process was discussed in relation to of the nature of water contained in the compounds.

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Section: Resultsmentioning

confidence: 99%

New sulfonic derivatives of quercetin as complexing reagents: synthesis, spectral, and thermal characterization

Woźnicka

Pieniążek

Zapała

et al. 2014

J Therm Anal Calorim

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“…A similar multi-component reaction involving metal ion, amines and formaldehyde has been used for another series of decaaza bismacrocycle-based complexes [M 2 (bmc2)X 4 ·nH 2 O ( 54/55 ) (M: Ni, Cu, Zn, bmc2: 1,3-bis( N , N -1,3,6,9,12-pentaazacyclotridecane)-benzene, X: Cl [ 129 ], CH 3 COO [ 130 ]) development as anti-biofilm species. The assays on a plethora of microorganisms ( B. subtilis , E. faecalis , S. aureus , S. epidermidis , E. cloacae , E. coli , K. pneumoniae , Proteus mirabilis , P. aeruginosa , C. albicans and C. krusei ) demonstrated good anti-biofilm activity of Cu(II) complexes on fungal strains, the acetate species being more active compared with the chloride one.…”

Section: Complexes With Antibiofilm Activitymentioning

confidence: 99%

Metal Complexes—A Promising Approach to Target Biofilm Associated Infections

2022

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Microbial biofilms are represented by sessile microbial communities with modified gene expression and phenotype, adhered to a surface and embedded in a matrix of self-produced extracellular polymeric substances (EPS). Microbial biofilms can develop on both prosthetic devices and tissues, generating chronic and persistent infections that cannot be eradicated with classical organic-based antimicrobials, because of their increased tolerance to antimicrobials and the host immune system. Several complexes based mostly on 3D ions have shown promising potential for fighting biofilm-associated infections, due to their large spectrum antimicrobial and anti-biofilm activity. The literature usually reports species containing Mn(II), Ni(II), Co(II), Cu(II) or Zn(II) and a large variety of multidentate ligands with chelating properties such as antibiotics, Schiff bases, biguanides, N-based macrocyclic and fused rings derivatives. This review presents the progress in the development of such species and their anti-biofilm activity, as well as the contribution of biomaterials science to incorporate these complexes in composite platforms for reducing the negative impact of medical biofilms.

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Studies on thermal, spectral, magnetic and biological properties of new Ni(II), Cu(II) and Zn(II) complexes with a bismacrocyclic ligand bearing an aromatic linker

Bucur

Badea

Chifiriuc

et al. 2013

J Therm Anal Calorim

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Investigation of thermal stability, spectral, magnetic, and antimicrobial behavior for new complexes of Ni(II), Cu(II), and Zn(II) with a bismacrocyclic ligand

Cited by 6 publications

References 29 publications

New sulfonic derivatives of quercetin as complexing reagents: synthesis, spectral, and thermal characterization

New sulfonic derivatives of quercetin as complexing reagents: synthesis, spectral, and thermal characterization

Metal Complexes—A Promising Approach to Target Biofilm Associated Infections

Studies on thermal, spectral, magnetic and biological properties of new Ni(II), Cu(II) and Zn(II) complexes with a bismacrocyclic ligand bearing an aromatic linker

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