Issue 55, 2016, Issue in Progress

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

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

Article information

Article type
Paper
Submitted
10 Mar 2016
Accepted
15 May 2016
First published
17 May 2016

RSC Adv., 2016,6, 49941-49953

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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