Synthesis, characterization, biological activities, and luminescent properties of lanthanide complexes with N,N′-bis(2-hydroxy-1-naphthylidene)-1,6-hexadiimine

Ajlouni, Abdulaziz M.; Taha, Ziyad A.; Momani, Waleed; Hijazi, Ahmed K.; Ebqa’ai, Mohammad

doi:10.1016/j.ica.2012.03.029

Cited by 40 publications

(27 citation statements)

References 26 publications

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“…The ligands possessed multiple aromatic rings, triazole and thiadiazole rings with a rigid planar skeleton structure that has a strong antenna effect. In order to obtain luminescence, the lowest triplet state energy of the ligand, must be close or lie above the resonance energy of the Eu(III) ions [23]. Among the eight complexes, it is clearly observed that the complexes substituted by the electron-withdrawing group have stronger luminescence intensities, this may be ascribed to triplet level of the ligands be lowered by the electron-withdrawing groups, thus the triplet state energy level of the ligands approaching to the resonance level of Eu(III), which makes the energy transition from ligands to Eu(III) more easily.…”

Section: Complexesmentioning

confidence: 99%

Synthesis, characterization and properties of 1,2,4-triazolo[3,4-b][1,3,4]thiadiazole derivatives and their europium complexes

Yan

Xiang

et al. 2014

Journal of Molecular Structure

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Section: Complexesmentioning

confidence: 99%

Synthesis, characterization and properties of 1,2,4-triazolo[3,4-b][1,3,4]thiadiazole derivatives and their europium complexes

Yan

Xiang

et al. 2014

Journal of Molecular Structure

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“…The prior studies have focused on preparation and characterization of complexes of europium (III) metal ion with organic reagents [46]. On the other hand, previous studies concerning the antibacterial and antifungal activity of ligand and its metal complexes tested against gram-positive and gram-negative bacteria, yeast, and fungi show that the complexes are more potent antimicrobials than the parent ligand [47][48][49].…”

Section: Introductionmentioning

confidence: 99%

Sm:HAp Nanopowders Present Antibacterial Activity against Enterococcus faecalis

Ciobanu

Popa

Predoi

2014

Journal of Nanomaterials

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The synthesis of nanoparticles with inhibitory and bactericidal effects represents a great interest in development of new materials for biological applications. In this paper we present for the first time the synthesis of Ca 10− Sm (PO 4 ) 6 (OH) 2 nanoparticles at low temperature and primary tests concerning the adherence of Enterococcus faecalis ATCC 29212 (gram-positive bacteria). All the XRD peaks were indexed in accordance with the hexagonal HAp in P63m space group. The EDAX spectrum and elemental mapping of O, P, Ca, and Sm demonstrate that all the elements were homogeneously distributed in Ca 10− Sm (PO 4 ) 6 (OH) 2 with Sm = 0.03. The peaks at 347.3 eV, 532.1 eV, and 133.8 eV in the XPS spectra can be attributed to the binding energy of Ca 2p, O 1s, and P 2p. The peak at 1084.4 eV observed in Ca 10− Sm (PO 4 ) 6 (OH) 2 was attributed to the Sm 3d 5/2 . Bacterial adhesion was reduced on Ca 10− Sm (PO 4 ) 6 (OH) 2 sample when compared to pure HAp ( Sm = 0) and significant differences in bacterial adhesion on pure HAp ( = 0) and Sm:HAp ( Sm = 0.01, Sm = 0.03, and Sm = 0.1) were observed. The bacterial adhesion decreased when the samarium concentrations increased. Finally, we demonstrate that the Sm:HAp nanopowder with Sm > 0 showed high antibacterial activity against Enterococcus faecalis ATCC 29212.

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“…This result confirmed that the pyridine N atom is not involved in the coordination. Further evidence for the coordination through both N and O atoms comes from the appearance of two new non‐ligand bands at 430 and 477 cm −1 , which were tentatively assigned to ν(Eu–O) and ν(Eu–N), respectively, Figure (ii) . Moreover, the presence of a broad band extending from 3700 to 3250 cm −1 with two maxima at 3420 and 3265 cm −1 could mean that uncoordinated water molecules are present in the complex, as is evident from the TGA study.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, density functional theory calculations and luminescence of lanthanide complexes with 2,6‐bis[(3‐methoxybenzylidene)hydrazinocarbonyl] pyridine Schiff base ligand

et al. 2017

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A pyridine-diacylhydrazone Schiff base ligand, L = 2,6-bis [(3-methoxy benzylidene) hydrazinocarbonyl]pyridine was prepared and characterized by single crystal X-ray diffraction. homogeneous and heterogeneous catalysis. [16][17][18] Following our recently published work towards the complexation of lanthanide(III) nitrate salts with dimethyl pyridine-2,6-dicarboxylate, we were interested in the synthesis of a 2,6-bis [(3-methoxybenzylidene)hydrazine carbonyl]pyridine L ligand derived from dimethyl pyridine-2,6-dicarboxylate ligand. [19] In comparison with dimethyl pyridine-2,6-dicarboxylate ligand, the L ligand possesses more coordination sites that can bind and stabilize different lanthanide metal ions with high coordination numbers. Moreover it has flexible groups that can accommodate and protect lanthanide metal atoms from solvent molecules, which avoid non-radiative deactivation processes. [20] Moreover, L is efficient in the displacement of water molecules present in the coordination sphere of lanthanide ions that quenches the luminescence by absorption of the emitted radiation in the vibrational excitation processes via the vibrational levels of the O-H of water molecules. [21] This work reports the synthesis of the L ligand by a condensation reaction between 2-methoxybenzaldehyde and 2,6-bis(hydrazinocarbonyl)pyridine in ethanol and describes its crystal structure. Additionally the coordinating behavior of L with lanthanide metals (Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy and Er) has been investigated by elemental analysis, conductivity measurements, spectral analysis (IR, NMR, UV-Vis and mass) and thermal studies.The antioxidant activity and photoluminescence properties of L and Ln-L have been investigated.

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Synthesis, characterization, biological activities, and luminescent properties of lanthanide complexes with N,N′-bis(2-hydroxy-1-naphthylidene)-1,6-hexadiimine

Cited by 40 publications

References 26 publications

Synthesis, characterization and properties of 1,2,4-triazolo[3,4-b][1,3,4]thiadiazole derivatives and their europium complexes

Synthesis, characterization and properties of 1,2,4-triazolo[3,4-b][1,3,4]thiadiazole derivatives and their europium complexes

Sm:HAp Nanopowders Present Antibacterial Activity against Enterococcus faecalis

Synthesis, density functional theory calculations and luminescence of lanthanide complexes with 2,6‐bis[(3‐methoxybenzylidene)hydrazinocarbonyl] pyridine Schiff base ligand

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