Synthesis, spectroscopic characterization, solid state d.c. electrical conductivity and biological studies of some lanthanide(III) chloride complexes with a heterocyclic Schiff base ligand
Condensation of 2-hydroxy-1-naphthaldehyde with 2-amino-3-carboxyethyl-4,5-dimethylthiophene in 1:1 molar ratio, yielded a potentially tridentate Schiff base viz. 2-[N-(2′-hydroxy-1-naphthylidene)amino]-3-carboxyethyl-4,5-dimethylthiophene (HNAT). This ligand formed complexes with lanthanum(III), ce...
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doaj-1080ac094deb440d9deadcf9a08e7ad72020-11-24T21:37:54ZengElsevierJournal of Saudi Chemical Society1319-61032016-07-0120437939010.1016/j.jscs.2012.07.007Synthesis, spectroscopic characterization, solid state d.c. electrical conductivity and biological studies of some lanthanide(III) chloride complexes with a heterocyclic Schiff base ligandK. Mohanan0N. Subhadrambika1R. Selwin Joseyphus2S.S. Swathy3V.P. Nisha4Department of Chemistry, University of Kerala, Kariavattam Campus, Trivandrum 695 581, Kerala, IndiaDepartment of Chemistry, N.S.S. College, Pandalam, Kerala, IndiaDepartment of Chemistry, St. John’s College, Anchal, Kollam 691 306, Kerala, IndiaDepartment of Chemistry, University of Kerala, Kariavattam Campus, Trivandrum 695 581, Kerala, IndiaDepartment of Chemistry, University of Kerala, Kariavattam Campus, Trivandrum 695 581, Kerala, IndiaCondensation of 2-hydroxy-1-naphthaldehyde with 2-amino-3-carboxyethyl-4,5-dimethylthiophene in 1:1 molar ratio, yielded a potentially tridentate Schiff base viz. 2-[N-(2′-hydroxy-1-naphthylidene)amino]-3-carboxyethyl-4,5-dimethylthiophene (HNAT). This ligand formed complexes with lanthanum(III), cerium(III), praseodymium(III), neodymium(III), samarium(III), europium(III) and gadolinium(III) chloride under well defined conditions. These complexes were characterized through elemental analysis, molar conductance, magnetic moment measurements, IR, UV–Vis, FAB mass and 1H NMR spectral studies. Analytical data showed that all the metal complexes exhibited 1:1 metal–ligand ratio. Molar conductance values adequately confirmed the non-electrolytic nature of the metal complexes. The proton NMR spectral observations supplement the IR spectral assignments. The spectral data revealed that the ligand acted as neutral tridentate, coordinating to the metal ion through azomethine nitrogen, ester carbonyl and naphtholate oxygen without deprotonation. The ligand and its lanthanum(III) chloride complex were subjected to XRD studies. The lanthanum(III) chloride complex has undergone a facile transesterification reaction. The solid state d.c. electrical conductivity of some selected complexes were measured as a function of temperature, indicating the semiconducting nature of the metal complexes. The antimicrobial activities were examined by disk diffusion method against some pathogenic bacterial and fungal species.http://www.sciencedirect.com/science/article/pii/S1319610312001159Schiff baseMolar conductanceXRDLanthanum(III) chlorideTransesterificationAntimicrobial activities |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
K. Mohanan N. Subhadrambika R. Selwin Joseyphus S.S. Swathy V.P. Nisha |
spellingShingle |
K. Mohanan N. Subhadrambika R. Selwin Joseyphus S.S. Swathy V.P. Nisha Synthesis, spectroscopic characterization, solid state d.c. electrical conductivity and biological studies of some lanthanide(III) chloride complexes with a heterocyclic Schiff base ligand Journal of Saudi Chemical Society Schiff base Molar conductance XRD Lanthanum(III) chloride Transesterification Antimicrobial activities |
author_facet |
K. Mohanan N. Subhadrambika R. Selwin Joseyphus S.S. Swathy V.P. Nisha |
author_sort |
K. Mohanan |
title |
Synthesis, spectroscopic characterization, solid state d.c. electrical conductivity and biological studies of some lanthanide(III) chloride complexes with a heterocyclic Schiff base ligand |
title_short |
Synthesis, spectroscopic characterization, solid state d.c. electrical conductivity and biological studies of some lanthanide(III) chloride complexes with a heterocyclic Schiff base ligand |
title_full |
Synthesis, spectroscopic characterization, solid state d.c. electrical conductivity and biological studies of some lanthanide(III) chloride complexes with a heterocyclic Schiff base ligand |
title_fullStr |
Synthesis, spectroscopic characterization, solid state d.c. electrical conductivity and biological studies of some lanthanide(III) chloride complexes with a heterocyclic Schiff base ligand |
title_full_unstemmed |
Synthesis, spectroscopic characterization, solid state d.c. electrical conductivity and biological studies of some lanthanide(III) chloride complexes with a heterocyclic Schiff base ligand |
title_sort |
synthesis, spectroscopic characterization, solid state d.c. electrical conductivity and biological studies of some lanthanide(iii) chloride complexes with a heterocyclic schiff base ligand |
publisher |
Elsevier |
series |
Journal of Saudi Chemical Society |
issn |
1319-6103 |
publishDate |
2016-07-01 |
description |
Condensation of 2-hydroxy-1-naphthaldehyde with 2-amino-3-carboxyethyl-4,5-dimethylthiophene in 1:1 molar ratio, yielded a potentially tridentate Schiff base viz. 2-[N-(2′-hydroxy-1-naphthylidene)amino]-3-carboxyethyl-4,5-dimethylthiophene (HNAT). This ligand formed complexes with lanthanum(III), cerium(III), praseodymium(III), neodymium(III), samarium(III), europium(III) and gadolinium(III) chloride under well defined conditions. These complexes were characterized through elemental analysis, molar conductance, magnetic moment measurements, IR, UV–Vis, FAB mass and 1H NMR spectral studies. Analytical data showed that all the metal complexes exhibited 1:1 metal–ligand ratio. Molar conductance values adequately confirmed the non-electrolytic nature of the metal complexes. The proton NMR spectral observations supplement the IR spectral assignments. The spectral data revealed that the ligand acted as neutral tridentate, coordinating to the metal ion through azomethine nitrogen, ester carbonyl and naphtholate oxygen without deprotonation. The ligand and its lanthanum(III) chloride complex were subjected to XRD studies. The lanthanum(III) chloride complex has undergone a facile transesterification reaction. The solid state d.c. electrical conductivity of some selected complexes were measured as a function of temperature, indicating the semiconducting nature of the metal complexes. The antimicrobial activities were examined by disk diffusion method against some pathogenic bacterial and fungal species. |
topic |
Schiff base Molar conductance XRD Lanthanum(III) chloride Transesterification Antimicrobial activities |
url |
http://www.sciencedirect.com/science/article/pii/S1319610312001159 |
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