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Articles by Fu-Hai Wu
Total Records ( 3 ) for Fu-Hai Wu
  Yun-Jun Liu , Jian-Feng He , Jun-Hua Yao , Wen-Jie Mei , Fu-Hai Wu and Li-Xin He
  Two polypyridine ruthenium(II) complexes, [Ru(dmp)2(MCMIP)]2+ (1) (MCMIP = 2-(6-methyl-3-chromonyl)imidazo[4,5-f][1,10]-phenanthroline, dmp = 2,9-dimethyl-1,10-phenanthroline) and [Ru(dmb)2(MCMIP)]2+ (2) (dmb = 4,4′-dimethyl-2,2′-bipyridine), have been synthesized and characterized by elemental analysis, ES-MS and 1H NMR. The DNA-binding behaviors of these complexes were investigated by electronic absorption titration, fluorescence spectroscopy, viscosity measurements and thermal denaturation. The results show that 1 and 2 effectively bind to CT-DNA; the DNA-binding affinities are closely related to the ancillary ligand.
  YI Liu , Yun-Jun Liu , Jun-Hua Yao , Wen-Jie Mei and Fu-Hai Wu
  Two Ru(II) complexes [Ru(dmb)2(dtmi)](ClO4)2 (1) (dmb = 4, 4’-dimethyl-2, 2’-bipyridine, dtmi = 3-(pyrazin-2-yl)-as-triazino[5, 6-f]-5-methoxylisatin) and [Ru(dmb)2(dtni)](ClO4)2 (2) (dtni = 3-(pyrazin-2-yl)-as-triazino[5, 6-f]-5-nitroisatin) have been synthesized and characterized by elemental analysis, ES-MS, and 1H NMR. DNA-binding behaviors of these complexes have been investigated by spectroscopic titration, viscosity measurements, and thermal denaturation. The results indicate that the two complexes interact with calf thymus DNA by intercalation.
  Fu-Hai Wu , Cheng-Hui Zeng , Yun-Jun Liu , Xiao-Yan Guan and Li-Xin He
  A new ligand ITAP and its complex [Ru(dmb)2(ITAP)](ClO4)2 (ITAP = isatino [1,2-b]-1,4,8, 9-tetraazatriphenylene, dmb = 4,4'-dimethyl-2,2'-bipyridine) have been synthesized and characterized by elemental analysis, Fast atom bombardment mass spectra, Electrospray mass spectra, and 1H NMR. Thermal denaturation and absorption titration experiments show the complex binds to calf thymus DNA (CT-DNA) with moderate affinities. Viscosity measurements and thermal denaturation indicate that the DNA-binding mode could be intercalative interaction. The Ru(II) complex in the presence of plasmid pBR322 DNA has been found to promote the cleavage of plasmid pBR322 DNA from the supercoiled Form I to the open circular Form II upon irradiation. Mechanisms for DNA cleavage by the complex were also investigated.
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