Citation: Jian Zhong WU, Lei WANG, Guang YANG, Tian Xian ZENG, Liang Nian JI. RUTHENIUM COORDINATION COMPOUNDS WITH POLYPYRIDINES V.DNA-BINDING STUDIES OF Ru(Ⅱ) COORDINATION COMPOUNDS WITH (2-PHENYL-) IMIDAZO [f] 1,10-PHENANTHROLINE[J]. Chinese Chemical Letters, ;1995, 6(11): 999-1002. shu

RUTHENIUM COORDINATION COMPOUNDS WITH POLYPYRIDINES V.DNA-BINDING STUDIES OF Ru(Ⅱ) COORDINATION COMPOUNDS WITH (2-PHENYL-) IMIDAZO [f] 1,10-PHENANTHROLINE

Jian Zhong WU ^a,b ,
Lei WANG ^a,b ,
Guang YANG ^a,b ,
Tian Xian ZENG ^a,b ,
Liang Nian JI ^a,b

a Department of Chemistry, Zhongshan University, Guangzhou 510275;
b National Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000

Received Date: 4 April 1995

Fund Project: This work was supported by the National Natural Science Foundation, the RSC Research Fund and the Can-An Ma Fund. Paper IV has just been submitted to CCL.

The binding of [Ru(bpy)₂(IP)]²⁺(b₂IP), [Ru(bpy)₂(PIP)]²⁺(b₂PIP),[Ru(phen)₂(IP)]²⁺(p₂IP), [Ru(phen)₂(PIP)]²⁺(p₂PIP) to calf thymus DNA was investigated using electronic absorption,circular dichroism and fluorescence emission spectroscopies.CD spectra of dialyzates indicate enantioselectivity associated with binding.Evidence of intercalative binding is also provided by hypochromicity in the MLCT bands,increased emission intensities and curvature of emission quenching by [Fe(CN)₈]^4-.The total binding affinities seem to be in the order b₂IP < b₂PIP ≤ P₂IP < P₂PIP,which is consistent with the order of ligand planarity,extent of aromatic π-system and hydrophobicity,bpy << phen < IP < PIP.
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