Journal
RESEARCH ON CHEMICAL INTERMEDIATES
Volume 41, Issue 6, Pages 3375-3388Publisher
SPRINGER
DOI: 10.1007/s11164-013-1440-5
Keywords
Bis(N-salicylidene)-3-oxapentane-1,5-diamine; Ytterbium(III) complex; Crystal structure; DNA-binding property; Antioxidant activity
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Funding
- National Natural Science Foundation of China [21367017]
- Fundamental Research Funds for the Gansu Province Universities [212086]
- National Natural Science Foundation of Gansu Province [1212RJZA037]
- 'Qing Lan' Talent Engineering Funds for Lanzhou Jiaotong University
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A new complex of ytterbium(III) nitrate with bis(N-salicylidene)-3-oxapentane-1,5-diamine (H2L), with the composition Yb-2(L)(2)(NO3)(2)center dot 2H(2)O, was synthesized and characterized by physic-chemical and spectroscopic methods. The crystal structure of the ytterbium(III) complex has been determined by single-crystal X-ray diffraction. It reveals a centrosymmetric binuclear neutral entity where Yb(III) metal centers are bridged by two phenoxo oxygen atoms. Electronic absorption titration spectra, ethidium bromide displacement experiments, and viscosity measurements indicate that both the ligand and the Yb(III) complex can bind calf thymus DNA, presumably via a groove binding mechanism. Furthermore, the antioxidant activities of the Yb(III) complex were determined by a superoxide and hydroxyl radical scavenging method in vitro, which indicates that it is a scavenger for OH and O-2 (-) radicals.
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