Number of the records: 1
On the Adsorption of Extended Viologens at the Electrode|Electrolyte Interface
- 1.
SYSNO ASEP 0349520 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title On the Adsorption of Extended Viologens at the Electrode|Electrolyte Interface Author(s) Hromadová, Magdaléna (UFCH-W) RID, ORCID, SAI
Kolivoška, Viliam (UFCH-W) RID, ORCID
Sokolová, Romana (UFCH-W) RID, ORCID, SAI
Gál, Miroslav (UFCH-W)
Pospíšil, Lubomír (UFCH-W) RID, ORCID
Valášek, Michal (UOCHB-X)Source Title Langmuir. - : American Chemical Society - ISSN 0743-7463
Roč. 26, č. 22 (2010), s. 17232-17236Number of pages 5 s. Language eng - English Country US - United States Keywords extended viologens ; electrode/electrolyte interface ; adsorption Subject RIV CG - Electrochemistry R&D Projects IAA400400802 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GA203/08/1157 GA ČR - Czech Science Foundation (CSF) GA203/09/0705 GA ČR - Czech Science Foundation (CSF) OC 140 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z40400503 - UFCH-W (2005-2011) AV0Z40550506 - UOCHB-X (2005-2011) UT WOS 000283837800081 DOI 10.1021/la1034239 Annotation Extended viologens represent a group of organic molecules intended to be used as molecular wires in molecular electronic devices. Adsorption properties of a novel series of extended viologen molecules were studied at the mercury electrode|electrolyte interface. These compounds form compact monolayers around the potential of zero charge with a constant differential capacitance value of 2.5 ± 0.2 μF cm−2 independent of temperature, length of the molecule, and its bulk concentration. At more negative potentials their reduction in the adsorbed state takes place. We showed that the adsorption process is diffusion controlled and time needed to fully cover the electrode surface is independent of the electrode potential. A modified Koryta equation was employed for the calculation of the surface concentration of the adsorbates leading to the value of 5.3 × 10−11 mol cm−2 for the shortest wire and to 1.6 × 10−11 mol cm−2 for the longest one. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2011
Number of the records: 1