Multiredox tetrathiafulvalene-modified oxide-free hydrogen-terminated Si(100) surfaces. - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Langmuir Année : 2012

Multiredox tetrathiafulvalene-modified oxide-free hydrogen-terminated Si(100) surfaces.

Résumé

Tetrathiafulvalene (TTF) monolayers covalently bound to oxide-free hydrogen-terminated Si(100) surfaces have been prepared from the hydrosilylation reaction involving a TTF-terminated ethyne derivative. FTIR spectroscopy characterization using similarly modified porous Si(100) substrates revealed the presence of vibration bands assigned to the immobilized TTF rings and the Si-C═C- interfacial bonds. Cyclic voltammetry measurements showed the presence of two reversible one-electron systems ascribed to TTF/TTF(.+) and TTF(.+)/TTF(2+) redox couples at ca. 0.40 and 0.75 V vs SCE, respectively, which compare well with the values determined for the electroactive molecule in solution. The amount of immobilized TTF units could be varied in the range from 1.7 × 10(-10) to 5.2 × 10(-10) mol cm(-2) by diluting the TTF-terminated chains with inert n-decenyl chains. The highest coverage obtained for the single-component monolayer is consistent with a densely packed TTF monolayer.

Domaines

Chimie organique
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Dates et versions

hal-00674300 , version 1 (27-02-2012)

Identifiants

Citer

Gilles Yzambart, Bruno Fabre, Dominique Lorcy. Multiredox tetrathiafulvalene-modified oxide-free hydrogen-terminated Si(100) surfaces.. Langmuir, 2012, 28 (7), pp.3453-9. ⟨10.1021/la204375a⟩. ⟨hal-00674300⟩
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