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Inclusion complex of α-cyclodextrin and the extended viologen dication: a model of an insulated molecular wire
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SYSNO ASEP 0361419 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Inclusion complex of α-cyclodextrin and the extended viologen dication: a model of an insulated molecular wire Author(s) Hromadová, Magdaléna (UFCH-W) RID, ORCID, SAI
Kolivoška, Viliam (UFCH-W) RID, ORCID
Gál, Miroslav (UFCH-W)
Pospíšil, Lubomír (UFCH-W) RID, ORCID
Sokolová, Romana (UFCH-W) RID, ORCID, SAI
Valášek, Michal (UOCHB-X)Source Title Journal of Inclusion Phenomena and Macrocyclic Chemistry. - : SPRINGER - ISSN 0923-0750
Roč. 70, 3-4 (2011), s. 461-469Number of pages 9 s. Language eng - English Country NL - Netherlands Keywords alpha-cyclodextrin ; extended viologen ; complex formation Subject RIV CG - Electrochemistry R&D Projects MEB041006 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LC510 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) OC 140 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA203/08/1157 GA ČR - Czech Science Foundation (CSF) GA203/09/1607 GA ČR - Czech Science Foundation (CSF) IAA400400802 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40400503 - UFCH-W (2005-2011) AV0Z40550506 - UOCHB-X (2005-2011) UT WOS 000294963800028 DOI 10.1007/s10847-010-9897-y Annotation An extended viologen dication 1, containing one viologen subunit, was used as a model for the inclusion complex formation between cyclodextrin (CD) molecules and molecular wires comprising several subunits. UV–Vis and fluorescence spectroscopic measurements confirmed the formation of two types of the inclusion complexes 1:1 and 2:1 between αCD and 1 in the aqueous solution containing 20% of ethanol. The complex formation constants were obtained from the fluorescence spectral changes: K a = 25 ± 3 mM−1 for [αCD–1] complex and K a = 0.21 ± 0.07 mM−2 for [(αCD)2–1] complex, respectively. Cyclodextrins βCD and γCD do not form the inclusion complexes with 1 in these aqueous solutions. The time-dependent differential capacitance measurements confirmed the adsorption of 1 in the form of a complex at the electrode/electrolyte interface. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2012
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