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Synthesis, Crystal Structure, and DNA-Binding Properties of a New Cd(II) Complex Involving 2-(2-1H-Imidazolyl)-1H-Imdazolium Ligand

✍ Scribed by Yanping Li; Pin Yang

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
135 KB
Volume
28
Category
Article
ISSN
0256-7660

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✦ Synopsis

A new Cd(II) complex of Cd(H 3 biim) 2 (NCS) 2 Cl 2 [H 3 biim＝2-(2-1H-imidazolyl)-1H-imidazolium] was synthesized and characterized by elemental analyses, FT-IR and X-ray single crystal diffraction. In the X-ray crystallography structure, the cadmium(II) ion is coordinated by two nitrogen atoms of two 2-(2-1H-imidazolyl)-1H-imdazolium, two nitrogen atoms of two thiocyanate ions and two Cl -. The interaction of the complex with calf thymus DNA was investigated through electronic absorption spectroscopy, fluorescence spectroscopy, viscosity measurement, cyclic voltammetry and gel electrophoresis. These results show that the Cd(II) complex can electrostatically bind to the phosphate group of DNA backbone. Interestingly, we found that the complex can cleave the pBR322 DNA at pH＝7.2 and 37 ℃.

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