Synthesis, characterization and DNA interaction studies of complexes of lanthanide nitrates with tris{2-[(3,4-dihydroxybenzylidene)imino]ethyl}amine

A new tripodal, hydroxyl-rich ligand, tris{2-[(3,4-dihydroxybenzylidene)imino]ethyl}amine (L), and its complexes with lanthanide nitrates were synthesized. These complexes which are stable in air with the general formula of [LnL(NO 3) 2]NO 3·H 2O (Ln = La, Sm, Eu, Gd, Y) were characterized by molar...

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Published in:Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2008-10, Vol.70 (5), p.1114-1119
Main Authors: Liu, Min, Yuan, Wen-bing, Zhang, Qi, Yan, Lan, Yang, Ru-dong
Format: Article
Language:English
Subjects:
Complexes
DNA interaction
Lanthanide
Synthesis
Tripodal ligand
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Summary:A new tripodal, hydroxyl-rich ligand, tris{2-[(3,4-dihydroxybenzylidene)imino]ethyl}amine (L), and its complexes with lanthanide nitrates were synthesized. These complexes which are stable in air with the general formula of [LnL(NO 3) 2]NO 3·H 2O (Ln = La, Sm, Eu, Gd, Y) were characterized by molar conductivity, elemental analysis, IR spectra and thermal analysis. The NO 3 − groups coordinated to lanthanide mono-dentately, and the coordination number in these complexes may be 8. The interaction of complexes with DNA were investigated by ultraviolet and fluorescent spectra, which showed that the binding mode of complexes with DNA was intercalation, and the binding affinity with DNA were La(III) complex > Sm(III) complex > Eu(III) complex > Gd(III) complex > Y(III) complex. Based on these results, it can be shown that the La(III)complex is promising candidate for therapeutic reagents and DNA probes.
ISSN:1386-1425
DOI:10.1016/j.saa.2007.10.023