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.
| Lingua originale | English |
|---|---|
| pagine (da-a) | 49941-49953 |
| Numero di pagine | 13 |
| Rivista | RSC Advances |
| Volume | 6 |
| Stato di pubblicazione | Published - 2016 |
All Science Journal Classification (ASJC) codes
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- ???subjectarea.asjc.1500.1500???