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Electrochemical behaviour of hexacyanoferrate(II)/(III) and ferrocene/ferricinium in lyotropic liquid crystals of polyoxyethylene (10) cetylether (Brij 56)
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SYSNO ASEP 0357522 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Electrochemical behaviour of hexacyanoferrate(II)/(III) and ferrocene/ferricinium in lyotropic liquid crystals of polyoxyethylene (10) cetylether (Brij 56) Author(s) Reiter, Jakub (UACH-T)
Uhlířová, Tereza (UACH-T)
Owen, J.R. (GB)Source Title Journal of Electroanalytical Chemistry. - : Elsevier - ISSN 1572-6657
Roč. 646, 1-2 (2010), s. 18-23Number of pages 6 s. Language eng - English Country CH - Switzerland Keywords lyotropic liquid crystal ; ferrocene ; diffusion coefficient ; Brij 56 ; nanostructure ; electrodeposition Subject RIV CG - Electrochemistry R&D Projects LC523 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) KJB200320801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40320502 - UACH-T (2005-2011) UT WOS 000280622800003 DOI 10.1016/j.jelechem.2010.04.014 Annotation The conductivity of a lyotropic liquid crystal medium (LLC) consisting of 50:50 wt.% Brij 56 (R) and 0.5 M aqueous KCl was found to be five times lower than the purely aqueous solution. Electrochemical properties of potassium hexacyanoferrate(II)/(III) and ferrocene/ferricinium in the LLC were examined by cyclic voltammetry and chronoamperometry on platinum foil and microdisk electrodes. Ferricinium reduction, while complicated in water by precipitation of ferrocene. showed solution behaviour and normal diffusion control in the liquid crystal. Effective diffusion coefficients of ferrocene and ferrocinium in the lyotropic liquid crystal were found to be further reduced to 4-5 x 10(-8) cm(2) s(-1). The lower diffusion coefficients compared with those in liquid solvents were attributed to restricted mobility and channel size effects in the LLC. The results are relevant to the design of electrochemical syntheses using LLC as nanostructured templates or as amphiphilic solvents. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2011
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