Electrochemical study of β-Cyclodextrin binding with ferrocene tethered onto a gold surface via PAMAM dendrimers

Journal of the Brazilian Chemical Society

E. Bustos²  J. Manríquez²  E. Juaristi¹  Thomas W. Chapman²  Luis A. Godínez² 

[1] ,Parque Tecnológico Querétaro Centro de Investigación y Desarrollo Tecnológico en Electroquímica Electrochemistry DepartmentQuerétaro,Mexico

关键词: dendrimers;    β-cyclodextrin;    ferrocene;    inclusion complexes;   

DOI  :  10.1590/S0103-50532008000500028

来源: SciELO

【 摘 要 】

This paper describes the tethering of ferrocene (Fc) onto polycrystalline gold electrodes by immobilized polyamidoamine (PAMAM) dendrimers films. The resulting electroactive surface provides a viable route for investigating quantitatively the host-guest binding of ferrocene with cyclodextrin (CD). In particular, electrochemical measurements reveal the effect of adsorbate-adsorbate interactions on the association constant K for the formation of the 1:1 βCD•Fc complex at the electrode-electrolyte interface. The results obtained from fitting the Frumkin isotherm to the adsorption data indicate that adsorbate-adsorbate interactions can have a strong impact on the βCD affinity for the ferrocenyl-modified surfaces studied here. The technique presented may be useful for investigating other host-guest binding reactions.

【 授权许可】

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