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- W2078647997 abstract "The electro-controlled delivery of drugs based on the doping-dedoping mechanism of Electro-Conducting Polymers is restricted to charged substances acting as dopants. In order to overcome this limitation, this study presents an approach where the trapping/delivering is based on host-guest interaction. As an example of a neutral guest, the molecule N-methylphenothiazine (NMP) is encapsulated in the host, heptasulphonated β-cyclodextrin (β-CDSO3−), which is tailor-made to dope PPy. The original synthetic method for β-CDSO3− is based on sulphonation of the periodated β-CD in the phase transfer medium. As a consequence of their size and of their multicharged character, β-CDSO3−s are fixed dopants. The stability of the β-CDSO3− entrapment is checked by Optical Beam Deflection (mirage effect) measurements. The ionic movements associated with the switching of the β-CDSO3− doped PPy (PPy+, β-CDSO3−) film appear to be mainly due to cations with this technique. Cyclic voltammetry experiments confirm the entrapment of neutral NMP by simply dipping the PPy+, β-CDSO3− film in a CH3CN solution containing NMP. Repeated electrochemical cycling of such a reservoir electrode indicates the progressive elimination of NMP from the (PPy+, β-CDSO3− [NMP]) film." @default.
- W2078647997 created "2016-06-24" @default.
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- W2078647997 date "1995-01-01" @default.
- W2078647997 modified "2023-09-27" @default.
- W2078647997 title "Incorporation of sulphonated cyclodextrins into polypyrrole: an approach for the electro-controlled delivering of neutral drugs" @default.
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- W2078647997 doi "https://doi.org/10.1016/0956-5663(95)96808-c" @default.
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