Počet záznamů: 1

Inclusion complex of α-cyclodextrin and the extended viologen dication: a model of an insulated molecular wire

  1. 1.
    0361419 - UFCH-W 2012 RIV NL eng J - Článek v odborném periodiku
    Hromadová, Magdaléna - Kolivoška, Viliam - Gál, Miroslav - Pospíšil, Lubomír - Sokolová, Romana - Valášek, Michal
    Inclusion complex of α-cyclodextrin and the extended viologen dication: a model of an insulated molecular wire.
    Journal of Inclusion Phenomena and Macrocyclic Chemistry. Roč. 70, 3-4 (2011), s. 461-469 ISSN 0923-0750
    Grant CEP: GA MŠk(CZ) MEB041006; GA MŠk LC510; GA MŠk OC 140; GA ČR GA203/08/1157; GA ČR GA203/09/1607; GA AV ČR IAA400400802
    Výzkumný záměr: CEZ:AV0Z40400503; CEZ:AV0Z40550506
    Klíčová slova: alpha-cyclodextrin * extended viologen * complex formation
    Kód oboru RIV: CG - Elektrochemie
    Impakt faktor: 1.886, rok: 2011

    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.
    Trvalý link: http://hdl.handle.net/11104/0198732