Chemical Oxidative Polymerization of β-Cyclodextrin/Aniline Inclusion Complex |
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Authors: | Mircea Grigoras Daniel Gheorghe Conduruta |
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Institution: | (1) Electroactive Polymers Department, P. Poni” Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487, Iasi, Romania |
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Abstract: | A β-cyclodextrin (β-CD)/aniline inclusion complex has been synthesized in aqueous solution and characterized by FT-IR and 1H-NMR spectroscopy, chemical analysis and thermogravimetric method. By elemental analysis and 1H-NMR spectroscopy a complex with stoichiometry 1:1.95 and 1:1.8 (β-CD/aniline) respectively, is found. The complexed aniline
was polymerized by chemical oxidative polymerization using ammonium peroxydisulfate in water (pH = 7) and 1M HCl aqueous solution.
In both cases, after an induction period, insoluble polyanilines (PANIs) are obtained, however, in water at pH = 7, a polypseudorotaxane
architecture containing a β-CD molecule to ~14 aniline units has resulted. In acidic conditions, anilinium cation is highly
hydrophilic and inclusion complex has a strong tendency to dissociate to free molecules and emeraldine salt of PANI, free
of host molecules is synthesized. |
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Keywords: | β -cyclodextrin/aniline inclusion complex chemical oxidative polymerization pseudorotaxane architecture |
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