This article is from the GISR part of the joint special issue on the European Conference on Nonlinear Optical Spectroscopy (ECONOS 2012) with Guest Editors Johannes Kiefer and Peter Radi and the II Italian Conference of the National Group of Raman Spectroscopy and Non-Linear Effects (GISR 2012) with Guest Editor Maria Grazia Giorgini.
Vibrational spectroscopy investigation of swelling phenomena in cyclodextrin nanosponges†
Article first published online: 15 APR 2013
Copyright © 2013 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Special Issue: Joint special issue on the European Conference on Nonlinear Optical Spectroscopy (ECONOS 2012) and the II Italian Conference of the National Group of Raman Spectroscopy and Non-Linear Effects (GISR 2012)
Volume 44, Issue 10, pages 1463–1469, October 2013
How to Cite
Castiglione, F., Crupi, V., Majolino, D., Mele, A., Rossi, B., Trotta, F. and Venuti, V. (2013), Vibrational spectroscopy investigation of swelling phenomena in cyclodextrin nanosponges. J. Raman Spectrosc., 44: 1463–1469. doi: 10.1002/jrs.4282
- Issue published online: 22 OCT 2013
- Article first published online: 15 APR 2013
- Manuscript Revised: 30 JAN 2013
- Manuscript Accepted: 30 JAN 2013
- Manuscript Received: 14 OCT 2012
- cyclodextrin nanosponges;
- FTIR-ATR spectroscopy;
- Raman spectroscopy;
- O–H stretching
The swelling behaviour of β-cyclodextrin nanosponges, a new class of polymers obtained by reacting β-cyclodextrin with pyromellitic dianhydride, has been here investigated by the analysis of the vibrational dynamics performed by using Fourier-transform infrared spectroscopy in Attenuated Total Reflectance geometry and Raman scattering. The measurements have been carried out at different hydration levels and in the temperature range 250 K–310 K. The decomposition and assignment of the spectral components of the O–H stretching band have been discussed in terms of water molecules engaged in different hydrogen bonding networks, allowing us to recognize three different ‘types’ of water, namely ‘bonded’, ‘intermediate'and ‘free’. By following this approach, a detailed picture of the connectivity pattern of water molecules inside the polymeric matrix is achieved. The analysis of HOH bending vibrational band gives further information perfectly consistent with the results obtained from the analysis of the O–H stretching spectral region. Copyright © 2013 John Wiley & Sons, Ltd.