Abstract
A novel Schiff base ligand (L = 7-methoxychromone-3-carbaldehyde benzoyl hydrazone) and its La(III) and Eu(III) complexes have been successfully prepared. The crystal structure of [LaL2(NO3)3]·H2O was characterized by X-ray crystallography. It crystallizes in monoclinic, space group C2/c with crystallographic data: a = 27.7173(17) Å, b = 10.0002(6) Å, c = 14.7884(9) Å, β = 102.6870(10)° and Z = 4. In the structure, the La(III) ion satisfies 12 coordination and three nitrate coordinate as bidentate ligand. The biological experiments show that the ligand and its two complexes can strongly bind to DNA through intercalation mode, and the three compounds also exhibit good antioxidant activities against OH• and O2 −•. Moreover, it is found that the Eu(III) complex exhibits characteristic fluorescence of europium ion in different organic solvent.
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This work is supported by the National Natural Science Foundation of China (20475023) and Gansu NSF(0710RJZA012).
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Qin, Dd., Qi, Gf., Yang, Zy. et al. Fluorescence and Biological Evaluation of the La(III) and Eu(III) Complexes with 7-methoxychromone-3-carbaldehyde Benzoyl Hydrazone Schiff Base. J Fluoresc 19, 409–418 (2009). https://doi.org/10.1007/s10895-008-0427-x
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DOI: https://doi.org/10.1007/s10895-008-0427-x