Formation and Luminescent Properties of New Heterobimetallic Complexes

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Formation and Luminescent Properties of New Heterobimetallic Complexes

ZHANG Qian-Ling¹, LIU Jian-Hong¹, REN Xiang-Zhong¹, ZHANG Pei-Xin¹, WANG Fang¹, LI Cui-Hua¹, LIU Jian-Zhong², JI Liang-Nian²

1. Department of Chemistry and Biology, Normal College, Shenzhen University, Shenzhen 518060, China;
2. The Key Laboratory of Gene Engineering of Ministry of Education, Colledge of Life Science, Zhongshan University, Guangzhou 510275, China

Received:2006-02-20 Revised:1900-01-01 Online:2006-10-10 Published:2006-10-10
Contact: LIU Jian-Hong

Abstract

Abstract: The formation of new heterobimetallic complexes obtained via the coordination reactions of [Ru(bpy)₂TPPHZ]²⁺(TPPHZ=tetrapyrido[3,2-a: 2',3'-c: 3",2"-h: 2'",3'"-j]phenazine) and [Ru(bpy)₂ODHIP]²⁺(ODHIP=3,4-dihydroxyl-imidazo[4,5-f][1,10]phenanthroline) with Ni²⁺ were investigated by spectroscopic methods. The DNA-binding and luminescent properties of the complexes after coordinating with Ni²⁺were also studied. The experimental results indicate that both [Ru(bpy)₂TPPHZ]²⁺and [Ru(bpy)₂ODHIP]²⁺ could coordinate with Ni²⁺ to form the heterobimetallic
complexes [Ru(bpy)_2^•(TPPHZ)Ni]⁴⁺ and [Ru(bpy)₂(ODHIP)Ni]⁴⁺. The emission intensity of the complexes decreased with increasing the amounts of Ni²⁺. After binding to DNA, both complexes could coordinate with Ni²⁺ to form the heterobimetallic complexes. [Ru(bpy)₂(TPPHZ)Ni]⁴⁺ kept binding to DNA by intercalation, and the luminescence of complex almost disappeared at n(Ni)/n(Ru)=1. While the binding mode of [Ru(bpy)₂•(ODHIP)Ni]⁴⁺ changed from groove binding to intercalation, and the emission intensity of the complex decreased.

Key words: Polypyridyl ruthenium(Ⅱ) complex, DNA, Ni²⁺, Luminescence, Intercalation

CLC Number:

O614.24

TrendMD:

ZHANG Qian-Ling¹, LIU Jian-Hong¹, REN Xiang-Zhong¹, ZHANG Pei-Xin¹, WANG Fang¹, LI Cui-Hua¹, LIU Jian-Zhong², JI Liang-Nian². Formation and Luminescent Properties of New Heterobimetallic Complexes[J]. Chem. J. Chinese Universities, doi: .

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Formation and Luminescent Properties of New Heterobimetallic Complexes

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