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

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). I...

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Detalhes bibliográficos
Autor principal: Bustos,E. (author)
Outros Autores: Manríquez,J. (author), Juaristi,E. (author), Chapman,Thomas W. (author), Godínez,Luis A. (author)
Formato: article
Idioma:eng
Publicado em: 2008
Assuntos:
dendrimers
β-cyclodextrin
ferrocene
inclusion complexes
Texto completo:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532008000500028
País:Brasil
Oai:oai:scielo:S0103-50532008000500028
Descrição
Resumo: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.

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