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Synthesis, Spectroscopic, Thermal and Antimicrobial Studies of neodymium(III) and samarium(III) Complexes Derived From Tetradentate Ligands Containing N and S Donor Atoms

Synthesis, Spectroscopic, Thermal and Antimicrobial Studies of neodymium(III) and samarium(III) Complexes Derived From Tetradentate Ligands Containing N and S Donor Atoms

Qurratul Ain, S K Pandey, O P Pandey, S K Sengupta

Spectrochim Acta A Mol Biomol Spectrosc. 2015 Apr 5;140:27-34.

PMID: 25579799

Abstract:

Trivalent lanthanide complexes of the type [Ln(L)Cl(H2O)2] (where Ln=Nd(III) or Sm(III) and LH2=Schiff bases derived by the condensation of 3-(phenyl/substitutedphenyl)-4-amino-5-mercapto-1,2,4-triazole with diacetyl/benzil) have been synthesized by the reactions of anhydrous lanthanide(III) chloride with Schiff bases in methanol. The structures of the complexes have been proposed on the basis of elemental analysis, electrical conductance, magnetic moment, spectroscopic measurements (IR, 1H, 13C NMR and UV-vis spectra) and X-ray diffraction studies. The spectral data reveal that the Schiff base ligands behave as dibasic tetradentate chelating agents having coordination sites at two thiol sulfur atoms and two azomethine nitrogen atoms. The presence of coordinated water in metal complexes was confirmed by thermal and IR data of the complexes. All the Schiff bases and their metal complexes have also been screened for their antibacterial activity against Bacillus subtilis, Staphylococcus aureus and antifungal activities against Aspergillus niger, Curvularia pallescens and Colletotrichum capsici.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP10024938	Neodymium(III) chloride		10024-93-8	Price
AP10361827	Samarium(III) chloride		10361-82-7	Price

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