Correlation of the formation constant of ferrocene-cyclodextrin complexes with dielectric properties of the aqueous DMSO solution

0361505 - ÚFCH JH 2012 RIV CH eng J - Journal Article
Kolivoška, Viliam - Gál, Miroslav - Hromadová, Magdaléna - Valášek, Michal - Pospíšil, Lubomír
Correlation of the formation constant of ferrocene-cyclodextrin complexes with dielectric properties of the aqueous DMSO solution.
Journal of Organometallic Chemistry. Roč. 696, č. 7 (2011), s. 1404-1408. ISSN 0022-328X. E-ISSN 1872-8561
R&D Projects: GA ČR GP203/09/P502; GA ČR GA203/09/1607; GA MŠMT OC 140; GA MŠMT LC510
Institutional research plan: CEZ:AV0Z40400503; CEZ:AV0Z40550506
Keywords : cycklodextrin * ferrocene * cyclic voltammetry
Subject RIV: CG - Electrochemistry
Impact factor: 2.384, year: 2011

The host-guest interactions between ferrocene and alpha-cyclodextrin (alpha-CD), beta-cyclodextrin (beta-CD), Heptakis(2,6-di-O-methyl)-beta-cyclodextrin (2-beta-CD) and Heptakis(2,3,6-tri-O-methyl)-beta-cyclodextrin (3-beta-CD) in aqueous DMSO solution were studied by means of cyclic voltammetry. The complex formation constant K was determined in the solutions of various values of the relative permittivity epsilon(r) of DMSO: water mixture. The dependence of K on dielectric properties of the mixtures 3r for all type of cyclodextrin utilized was found. Furthermore, the dependence of K on the cyclodextrin type was also found. As an additional feature the different dependencies of the Gibbs energy of the complex formation, Delta G(CF)(0) for different CDs on the volume ratio of DMSO, phi(DMSO) were observed.
Permanent Link: http://hdl.handle.net/11104/0198806