| Téléchargement | - Voir la version finale : Electrochemically driven assembly of mixed dithiol bilayers via sulfur dimers (PDF, 591 Kio)
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| DOI | Trouver le DOI : https://doi.org/10.1021/la034959m |
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| Auteur | Rechercher : Rifai, S.; Rechercher : Lopinski, G. P.1; Rechercher : Ward, T.1; Rechercher : Wayner, D. D. M.1; Rechercher : Morin, M. |
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| Affiliation | - Conseil national de recherches du Canada. Institut Steacie des sciences moléculaires du CNRC
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| Format | Texte, Article |
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| Résumé | We report on the electroformation of mixed bilayers of rigid (1,4-benzenedimethanethiol) and flexible (1,6-hexanedithiol) dithiols on Au(111) from alkaline aqueous solution. These bilayers are formed by first electrodepositing a monolayer of vertically aligned dithiols. The unreacted dithiols are then oxidatively dimerized with the other dithiols, and a bilayer is formed. ACIS (ac impedance spectroscopy) measurements indicate that the monolayer of the rigid dithiol is a better substrate for dimerization than the flexible dithiol. ACIS also reveals that the electroformation of a bilayer is more complete, and the bilayer has fewer defects than one obtained through chemical incubation. Infrared reflection-absorption spectroscopy provides proof for mixed-bilayer formation of the alkanedithiol with the benzenedimethanethiol having its methylene groups deuterated. The mechanism for bilayer formation via the oxidative dimerization of thiols is supported by high-resolution electron energy loss spectra of bilayers, which show a S-S stretch at 515 cm-1. Our results show that this electrochemical approach is a viable methodology for the formation of complex organic interfaces. |
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| Date de publication | 2003-10-14 |
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| Maison d’édition | American Chemical Society |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 12339018 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 2b9ba878-0bb9-4dc2-87a4-1fa06edbed60 |
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| Enregistrement créé | 2009-09-11 |
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| Enregistrement modifié | 2020-05-27 |
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