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Synthesis, Characterization, and DNA Interaction Studies of the Ruthenium(II) Complexes [Ru(bpy)2(ipbp)]2+ and [Ru(ipbp)(phen)2]2+ (ipbp=3-(1H-Imidazo[4,5-f][1,10]phenanthrolin-2-yl)-4H-1-benzopyran-2-one; bpy=2,2′-Bipyridine; phen=1,10-Phenanthroline)

✍ Scribed by Yun-Jun Liu; Hui Chao; Jun-Hua Yao; Hong Li; Yi-Xian Yuan; Liang-Nian Ji

Publisher
John Wiley and Sons
Year
2004
Tongue
German
Weight
164 KB
Volume
87
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

A novel ligand 3‐(1__H__‐imidazo[4,5‐f][1,10]phenanthrolin‐2‐yl)‐4__H__‐1‐benzopyran‐4‐one (ipbp) and its ruthenium(II) complexes [Ru(bpy)~2~(ipbp)]^2+^ (1) and [Ru(ipbp)(phen)~2~]^2+^ (2) (bpy=2,2′‐bipyridine, phen=1,10‐phenanthroline) were synthesized and characterized by elemental analysis and mass, ^1^H‐NMR, and electronic‐absorption spectroscopy. The electrochemical behavior of the complexes was studied by cyclic voltammetry. The DNA‐binding behavior of the complexes was investigated by spectroscopic methods and viscosity measurements. The results indicate that complexes 1 and 2 bind with calf‐thymus DNA in an intercalative mode. In addition, 1 and 2 promote cleavage of plasmid pBR 322 DNA from the supercoil form I to the open circular form II upon irradiation.

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