Lanthanide amino acid Schiff base complexes: synthesis, spectroscopic characterization, physical properties and in vitro antimicrobial studies

Alghool, Samir; Zoromba, M. Sh.; El‐Halim, Hanan F. Abd

doi:10.1016/s1002-0721(12)60347-0

Cited by 36 publications

(11 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is probably due the fact that the f-f bands are weak and obscured by the intense charge transfer bands. 18,19 The magnetic moments of the lanthanide(III) complexes indicate that only the La(III) complex is diamagnetic, and the other tripositive lanthanide ion complexes are paramagnetic.…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Novel lanthanide(III) 4-methylbenzoylhydrazide complexes as precursors for lanthanide oxide nanophotocatalysts

et al. 2019

View full text Add to dashboard Cite

show abstract

Section: Photocatalytic Activitymentioning

confidence: 99%

Novel lanthanide(III) 4-methylbenzoylhydrazide complexes as precursors for lanthanide oxide nanophotocatalysts

et al. 2019

View full text Add to dashboard Cite

show abstract

“…A broad band at 3429 cm -1 in 1 is attributed to OH group of the crystal water molecules. This indicates existence of water of hydration [23].…”

Section: Ft-irmentioning

confidence: 78%

Investigating the effect of immobilization of yttrium-Schiff base onto magnetite nanoparticles: enhanced catalytic activity in the synthesis of dihydropyrimidinones under solvent-free conditions

Khomami

Heshmatpour

2015

Res Chem Intermed

View full text Add to dashboard Cite

A new complex of yttrium-salpr was synthesized through the reaction of Y(NO 3 ) 3 Á6(H 2 O) and salpr Schiff base (salpr = N,N 0 -bis(3-salicylidenaminopropyl) amine). The prepared complex was characterized by Mid and Far-IR, 13 C-NMR, 1 H-NMR, UV-Vis, XRF, and CHN. The obtained data suggested a binuclear structure for this compound. To our surprise, the catalytic activity of this complex was even lower than its precursor, Y(NO 3 ) 3 Á6(H 2 O), in one-pot synthesis of dihydropyrimidinones under solvent-free conditions. As one of the reasons of this reduced activity should pertain to the binuclear structure of the complex that reduces the availability of yttrium in the reaction, the complex was immobilized on modified Fe 3 O 4 nanoparticles, which not only increases the surface to the volume ratio of the compound, but also hinders the formation of binuclear structure due to site (Schiff base) isolation. These prepared nanoparticles depicted noticeably high catalytic activity as well as good recyclability and very easy separation.

show abstract

“…To an ethanolic solution of Schiff base ligand (0.004 mol) containing NaOH (0.004 mol), lanthanide nitrate (0.002 mol) in 10 mL ethanol was added drop wise with constant stirring for half an hour on hot plate at 60 °C, in the solution metal to ligand ratio is 1:2. A solid product was obtained filtered off, washed with ethanol 13 . In the study of antifungal activity of the free Schiff base ligand and their Ln(III) complexes were screened in-vitro against Aspergillus niger and Saccharomyces cerevisiae with Amphotericin B as standard drug.…”

Section: Synthesis Of Rare Earth Complexesmentioning

confidence: 99%

Untitled

2021

IJPSR

View full text Add to dashboard Cite

Schiff base was prepared by using 4-amino-3-hydroxy benzoic acid and 4-nitrobenzaldehyde, namely (E)-3-hydroxy-4-((4-nitrobenzylidene) amino)benzoic acid. In the preparation of rare earth complexes, nitrates of lanthanum, Cerium, and Praseodymium were used with Schiff base. Rare earth Schiff base complexes were prepared by using NaOH to maintain the pH of solvent. Synthesized Schiff base ligand and its complexes were structurally characterized by UV, IR, NMR, HRMS, TGA, and elemental analysis. Structural characterization shows 1:2 metal to ligand ratio in the complexes. The electronic absorption spectra of the ligands and their metal complexes are recorded after preparing the solution and after standing the solution for 3 weeks in DMF. No appreciable change was observed in the spectrum with time. Free ligands and their metal complexes have different electronic spectra's and blue shift observed in complexes which support the complex formation. HRMS are in good agreement with calculated values, which confirms the proposed structure of ligand. Carboxylate group of Schiff base ligand shows bidentate the coordination to central metal and azomethine group is not involved in coordination. TGA shows the presence of lattice and coordinated water molecules in complexes. The present study deals with antibacterial and antifungal activity of Schiff base ligand and their Ln(III) complexes by disc diffusion method. In the study of antibacterial activity of the free Schiff base ligand and their Ln(III) complexes were screened in-vitro against gram-positive bacteria Staphylococcus aureus and Bacillus subtilis as well as with gram-negative bacteria Escherichia coli and Pseudomonas aeruginosa with Chloramphenicol as standard drug. In the study of antifungal activity of the free Schiff base ligand and their Ln(III) complexes were screened in-vitro against Aspergillus niger and Saccharomyces cerevisiae with Amphotericin B as a standard drug. Schiff base ligand and complexes showed good antimicrobial activity against Saccharomyces cerevisiae. INTRODUCTION:The growth of bacteria, fungi, and soil nematodes is inhibited by rare-earth ions. Except for radioactive promethium, most of the rare earth elements had antibacterial and antifungal properties which are comparable to copper ions.

show abstract

Lanthanide amino acid Schiff base complexes: synthesis, spectroscopic characterization, physical properties and in vitro antimicrobial studies

Cited by 36 publications

References 25 publications

Novel lanthanide(III) 4-methylbenzoylhydrazide complexes as precursors for lanthanide oxide nanophotocatalysts

Novel lanthanide(III) 4-methylbenzoylhydrazide complexes as precursors for lanthanide oxide nanophotocatalysts

Investigating the effect of immobilization of yttrium-Schiff base onto magnetite nanoparticles: enhanced catalytic activity in the synthesis of dihydropyrimidinones under solvent-free conditions

Untitled

Contact Info

Product

Resources

About