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Issue 55, 2016, Issue in Progress
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Polyaminocyclodextrin nanosponges: synthesis, characterization and pH-responsive sequestration abilities

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Abstract

New pH-responsive nanosponges were obtained by reacting four different polyaminocyclodextrins with heptakis-(6-bromo)-(6-deoxy)-β-cyclodextrin. The materials obtained were characterized by various techniques (FT-IR, potentiometric titration, differential scanning calorimetry (DSC), porosimetry (BET), 13C{1H} CP-MAS NMR). Their adsorption abilities at different pH values were verified towards a suitable set of model guests, and seem mainly controlled by electrostatic interactions, as a function of the protonation/charge status of the polymer matrix. By contrast, data positively point out a lesser importance assumed by the induced-fit effect, important in affecting the formation of host–guest complexes in solution. The frequency-switched Lee-Goldburg (FSLG) heteronuclear correlation solid-state NMR technique was exploited in order to assess the possible location of the guests within the polymer matrix.

Graphical abstract: Polyaminocyclodextrin nanosponges: synthesis, characterization and pH-responsive sequestration abilities

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Publication details

The article was received on 10 Mar 2016, accepted on 15 May 2016 and first published on 17 May 2016


Article type: Paper
DOI: 10.1039/C6RA06417E
RSC Adv., 2016,6, 49941-49953

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    Polyaminocyclodextrin nanosponges: synthesis, characterization and pH-responsive sequestration abilities

    M. Russo, M. L. Saladino, D. Chillura Martino, P. Lo Meo and R. Noto, RSC Adv., 2016, 6, 49941
    DOI: 10.1039/C6RA06417E

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