Lanthanide(III) complexes with tridentate Schiff base ligand, antioxidant activity and X-ray crystal structures of the Nd(III) and Sm(III) complexes
The tridentate N4-type Schiff base was synthesized from the condensation reaction of 2-hydrazinopyridine and pyridine-2-carbaldehyde. Neodymium and Samarium complexes were isolated when the corresponding nitrate salt was added to the solution of the ligand. The isolated compounds were characterized by elemental analyses, IR study, room temperature magnetic measurements and single X-ray crystal diffraction of the two crystals. Both complexes crystallize in the monoclinic system with space group P21/c.The cell parameters of the Nd complex are a = 11.0927(8)Å,b = 17.9926 (13) Å, c = 11.9395(9) Å and β = 115.274(5) ° while the Sm complex shows parameters cell of a = 11.0477(8) Å, b = 17.9254(13) Å, c = 11.9149(8) Å and β = 115.489(5) °. The X-ray study reveals isotopic Nd/Sm binuclear structures were each metal ion is nine-coordinated in the same fashion. Both metal centers have distorted tricapped trigonal prism geometry, with the Schiff base acting as tridentate ligand. The DPPH· radical scavenging effects of the Schiff base ligand and its Ln(III) complexes were screened. The Ln(III) complexes were significantly more efficient in quenching DPPH· than the free Schiff base ligand.
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The South African Chemical Institute
2017
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oai:scielo:S0379-435020170001000022018-03-20Lanthanide(III) complexes with tridentate Schiff base ligand, antioxidant activity and X-ray crystal structures of the Nd(III) and Sm(III) complexesGueye,Mbossé NdiayeDieng,MoussaThiam,Ibrahima ElhadjiLo,DjibyBarry,Aliou HamadyGaye,MohamedRetailleau,Pascal Lanthanide complexes hydrazino antioxidant activity X-ray structure The tridentate N4-type Schiff base was synthesized from the condensation reaction of 2-hydrazinopyridine and pyridine-2-carbaldehyde. Neodymium and Samarium complexes were isolated when the corresponding nitrate salt was added to the solution of the ligand. The isolated compounds were characterized by elemental analyses, IR study, room temperature magnetic measurements and single X-ray crystal diffraction of the two crystals. Both complexes crystallize in the monoclinic system with space group P21/c.The cell parameters of the Nd complex are a = 11.0927(8)Å,b = 17.9926 (13) Å, c = 11.9395(9) Å and β = 115.274(5) ° while the Sm complex shows parameters cell of a = 11.0477(8) Å, b = 17.9254(13) Å, c = 11.9149(8) Å and β = 115.489(5) °. The X-ray study reveals isotopic Nd/Sm binuclear structures were each metal ion is nine-coordinated in the same fashion. Both metal centers have distorted tricapped trigonal prism geometry, with the Schiff base acting as tridentate ligand. The DPPH· radical scavenging effects of the Schiff base ligand and its Ln(III) complexes were screened. The Ln(III) complexes were significantly more efficient in quenching DPPH· than the free Schiff base ligand.The South African Chemical InstituteSouth African Journal of Chemistry v.70 20172017-01-01journal articletext/htmlhttp://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0379-43502017000100002en |
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Gueye,Mbossé Ndiaye Dieng,Moussa Thiam,Ibrahima Elhadji Lo,Djiby Barry,Aliou Hamady Gaye,Mohamed Retailleau,Pascal |
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Gueye,Mbossé Ndiaye Dieng,Moussa Thiam,Ibrahima Elhadji Lo,Djiby Barry,Aliou Hamady Gaye,Mohamed Retailleau,Pascal Lanthanide(III) complexes with tridentate Schiff base ligand, antioxidant activity and X-ray crystal structures of the Nd(III) and Sm(III) complexes |
| author_facet |
Gueye,Mbossé Ndiaye Dieng,Moussa Thiam,Ibrahima Elhadji Lo,Djiby Barry,Aliou Hamady Gaye,Mohamed Retailleau,Pascal |
| author_sort |
Gueye,Mbossé Ndiaye |
| title |
Lanthanide(III) complexes with tridentate Schiff base ligand, antioxidant activity and X-ray crystal structures of the Nd(III) and Sm(III) complexes |
| title_short |
Lanthanide(III) complexes with tridentate Schiff base ligand, antioxidant activity and X-ray crystal structures of the Nd(III) and Sm(III) complexes |
| title_full |
Lanthanide(III) complexes with tridentate Schiff base ligand, antioxidant activity and X-ray crystal structures of the Nd(III) and Sm(III) complexes |
| title_fullStr |
Lanthanide(III) complexes with tridentate Schiff base ligand, antioxidant activity and X-ray crystal structures of the Nd(III) and Sm(III) complexes |
| title_full_unstemmed |
Lanthanide(III) complexes with tridentate Schiff base ligand, antioxidant activity and X-ray crystal structures of the Nd(III) and Sm(III) complexes |
| title_sort |
lanthanide(iii) complexes with tridentate schiff base ligand, antioxidant activity and x-ray crystal structures of the nd(iii) and sm(iii) complexes |
| description |
The tridentate N4-type Schiff base was synthesized from the condensation reaction of 2-hydrazinopyridine and pyridine-2-carbaldehyde. Neodymium and Samarium complexes were isolated when the corresponding nitrate salt was added to the solution of the ligand. The isolated compounds were characterized by elemental analyses, IR study, room temperature magnetic measurements and single X-ray crystal diffraction of the two crystals. Both complexes crystallize in the monoclinic system with space group P21/c.The cell parameters of the Nd complex are a = 11.0927(8)Å,b = 17.9926 (13) Å, c = 11.9395(9) Å and β = 115.274(5) ° while the Sm complex shows parameters cell of a = 11.0477(8) Å, b = 17.9254(13) Å, c = 11.9149(8) Å and β = 115.489(5) °. The X-ray study reveals isotopic Nd/Sm binuclear structures were each metal ion is nine-coordinated in the same fashion. Both metal centers have distorted tricapped trigonal prism geometry, with the Schiff base acting as tridentate ligand. The DPPH· radical scavenging effects of the Schiff base ligand and its Ln(III) complexes were screened. The Ln(III) complexes were significantly more efficient in quenching DPPH· than the free Schiff base ligand. |
| publisher |
The South African Chemical Institute |
| publishDate |
2017 |
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http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0379-43502017000100002 |
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