Electrochemical Studies on the Interactions of the Complex of Co(phen)2TATP3+ with DNA at Rotating Au Au Electrode

Chem. J. Chinese Universities ›› 2000, Vol. 21 ›› Issue (7): 995.

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Electrochemical Studies on the Interactions of the Complex of Co(phen)₂TATP³⁺ with DNA at Rotating Au Au Electrode

LI Hong¹, JIANG Xiong², WANG Lei³, YE Bao-Hui¹, JI Liang-Nian¹

1. School of Chemistry and Engineering, Zhongshan University, Guangzhou 510275, China;
2. Department of Chemistry, South China Normal University, Guangzhou 510631, China;
3. Department of Chemistry, Guangzhou Normal College, Guangzhou 510405, China

Received:1999-10-20 Online:2000-07-24 Published:2000-07-24

Abstract

Abstract: The interaction between complex Co(phen)₂TATP ³⁺ (phen=1,10 phenanthroline, TATP= 1,4,8,9-tetranitrogen-trisphene) and DNAhas been investigated by using rotating ring-disk electrode technique, and its models are discussed from the parameters obtained under diffusion and electrochemical control, respectively. It has been found that the values of the following electrochemical parameters: the apparent diffusion coefficient, transfer coefficient, rate constant at half-wave potential, collection coefficient, desorption efficiency etc., for the complex of Co(phen)₂TATP ³⁺ decrease significantly in the presence of DNAcompared with that in the absence of DNA. It is shown from the comparative studies of Co(bpy)₃³⁺ that, in the presence of DNA, significant differences exist in the change of transfer coefficient and collection coefficient between Co(bpy)₃³⁺ and Co(phen)₂TATP ³⁺ .

Key words: Polypyridyl cobalt(Ⅲ) complex, DNA, Gold electrode, Rotating ring disk electrode, Intercatative interaction

CLC Number:

O614.81

TrendMD:

LI Hong, JIANG Xiong, WANG Lei, YE Bao-Hui, JI Liang-Nian. Electrochemical Studies on the Interactions of the Complex of Co(phen)₂TATP³⁺ with DNA at Rotating Au Au Electrode[J]. Chem. J. Chinese Universities, 2000, 21(7): 995.

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Electrochemical Studies on the Interactions of the Complex of Co(phen)₂TATP³⁺ with DNA at Rotating Au Au Electrode

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