Cobaltabisdicarbollide anion [CO(C2B9H11)(2)](-) as doping agent on intelligent membranes for ion capture

C. Masalles, F. Teixidor*, S. Borrós, C. Viñas

*Autor corresponent d’aquest treball

Producció científica: Article en revista indexadaArticleAvaluat per experts

32 Cites (Scopus)

Resum

It has been proven that the non-nucleophilic, low charge density and weakly coordinating cobaltabisdicarbollide anion [Co(C2B9H11)(2)](-), can be highly relevant as dopant for conducting organic polymers. We have developed a new material based on polypyrrole (PPy) which uses the cobaltabisdicarbollide anion as a doping agent. This anion provides enhanced properties to PPy, the most striking one is the high over oxidation resistance. The high volume of [Co(C2B9H11)(2)](-) imposes low mobility inside the polymeric matrix thus preventing dopant leakage when a reducing potential is applied on the material. Under these conditions the cation capture (Eq. 1) prevails during the reversible electrochemical redox process, also called doping-undoping. [PPyn+ (A(-))(n)]+nC(+)+ne(-)Delta[PPy(A(-))(n)(C+)(n)]. The membrane is highly sensitive to the cationic volume of the solute. This property has allowed to develop cationic selective membranes by control of the applied reducing potential. The chronocoulometries registered during the charge-discharge process show an almost perfect reversibility of cation exchange process and no detectable degradation of the membrane due to dopant loss or over oxidation even after 40 successive cycles. (C) 2002 Elsevier Science B.V. All rights reserved.
Idioma originalAnglès
Número d’articlePII S0022-328X(02)01432-8
Pàgines (de-a)239-246
Nombre de pàgines8
RevistaJournal of Organometallic Chemistry
Volum657
Número1-2
DOIs
Estat de la publicacióPublicada - 1 de set. 2002
Esdeveniment2nd European Symposium on Boron Chemistry (Euroboron 2) - DINARD, France
Durada: 2 de set. 20016 de set. 2001

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