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Journal of Coordination Chemistry
Year: 2009  |  Volume: 62  |  Issue: 10  |  Page No.: 1701 - 1708

Effect of substituents on DNA-binding behaviors of ruthenium(II) complexes: [Ru(dmb)2(dtmi)] 2+ and [Ru(dmb)2(dtni)] 2+

YI Liu, Yun-Jun Liu, Jun-Hua Yao, Wen-Jie Mei and Fu-Hai Wu    

Abstract: 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.

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