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Reactive Pseudorotaxanes: Inclusion Complexation of Reduced Viologens by the Hosts β-Cyclodextrin and Heptakis(2,6-di-o-Methyl)-β-Cyclodextrin

✍ Scribed by Armen Mirzoian; Angel E. Kaifer

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 719 KB
Volume: 3
Category: Article
ISSN: 0947-6539
DOI: 10.1002/chem.19970030711

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✦ Synopsis

The complexation of three guests containing 4,4'-bipyridinium redoxactive residues by p-cyclodextrin (p-CD) and its heptakis-(2,6-O-dimethyl) analogue (DM-b-CD) was investigated by means of voltammetric techniques. The three 4,4'-bipyridinium (viologen) derivatives used as guests were designed to be water-soluble in all three accessible oxidation states. The N-substituents chosen to enhance aqueous solubility were: 2-(2-(2-ethoxy)ethoxy)ethanol (guest l2 '), 6-hexanoate (guest 2) , and 3-propanesulfonate (guest 3). Detailed analysis of the voltammetric results by digital simulation Keywords cyclic voltammetry cyclodextrins * host -guest chemistrypseudorotaxanesviologens [

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## Abstract The inclusion complex of heptakis(2,6‐di‐__O__‐methyl)‐β‐cyclodextrin (DIMEB) with euplotin C (EC), a cytotoxic metabolite isolated from the protistan strains composing the marine ciliate __Euplotes crassus,__ has been investigated by ^1^H NMR techniques, electrospray ionization mass sp