期刊
JOURNAL OF COORDINATION CHEMISTRY
卷 63, 期 1, 页码 115-123出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/00958970903311773
关键词
Transition metal complex; Crystal structure; Reduced Schiff base; DNA binding
资金
- National Natural Science Foundation of China [20771063]
Three new reduced amino-acid Schiff-base complexes, [Zn(HL)2] center dot H2O (1), [Ni(HL)2] center dot H2O (2), and [Cd(HL)2] center dot H2O (3), where H2L is a reduced Schiff base derived from condensation of N-(2-hydroxybenzaldehyde) and L-histidine, have been synthesized and characterized by elemental analysis, UV-Vis absorption spectra and single crystal X-ray diffraction. Complexes 1-3 are isostructural. All metal centers are six-coordinate with O2N4 donor sets in slightly distorted octahedra. Unlike its Schiff-base counterpart, the deprotonated monoanionic ligand HL- has a more flexible backbone and two HL- are tridentate to one metal. Moreover, the binding interactions of these complexes with calf thymus DNA (CT-DNA) have been investigated by UV-Vis spectra and fluorescence quenching, which show that the complexes bind in an intercalative mode.
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