التفاصيل البيبلوغرافية
| العنوان: |
Probing the molecular connectivity of water confined in polymer hydrogels |
| المؤلفون: |
B. Rossi, 1, Venuti, 2) V., Melone, 4) L., Crupi, 4) V., Majolino, 1) D., Trotta, 1) F., D’Amico, F., Gessini, A., Masciovecchio, C., MELE, ANDREA, PUNTA, CARLO |
| المساهمون: |
B. Rossi, 1, Venuti, 2) V., Mele, Andrea, Punta, Carlo, Melone, 4) L., Crupi, 4) V., Majolino, 1) D., Trotta, 1) F., D’Amico, F., Gessini, A., Masciovecchio, C. |
| سنة النشر: |
2015 |
| المجموعة: |
RE.PUBLIC@POLIMI - Research Publications at Politecnico di Milano |
| مصطلحات موضوعية: |
water dynamic, hydrogel, cyclodextrin, FT-IR, vibrational spectroscopy |
| الوصف: |
The molecular connectivity and the extent of hydrogen-bond patterns of water molecules confined in the polymer hydrogels, namely cyclodextrin nanosponge hydrogels, are here investigated by using vibrational spectroscopy experiments. The proposed spectroscopic method exploits the combined analysis of the vibrational spectra of polymers hydrated with water and deuterated water that allows us to separate and selectively investigate the temperature-evolution of the HOH bending mode of engaged water molecules and of the vibrational modes assigned to specific chemical groups of the polymer matrix involved in the physical interactions with water. As main results, we find a strong experimental evidence of a liquid-like behaviour of water molecules confined in the nano-cavities of hydrogel and we observe a characteristic destructuring effect on the hydrogen-bonds network of confined water induced by thermal motion. More interestingly, the extent of this temperature-disruptive effect is found to be selectively triggered by the cross-linking degree of the hydrogel matrix. These results give a more clear picture of the molecular mechanism of water confinement in the pores of nanosponge hydrogel and open the possibility to exploit the spectroscopic method here proposed as investigating tools for water-retaining soft materials. |
| نوع الوثيقة: |
article in journal/newspaper |
| وصف الملف: |
STAMPA |
| اللغة: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/wos/WOS:000347973600034; volume:142; issue:014901; firstpage:1; lastpage:13; numberofpages:13; journal:THE JOURNAL OF CHEMICAL PHYSICS; http://hdl.handle.net/11311/971880; dx.doi.org/10.1063/1.4904946; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84923778283 |
| الاتاحة: |
http://hdl.handle.net/11311/971880 |
| Rights: |
info:eu-repo/semantics/openAccess |
| رقم الانضمام: |
edsbas.37562C3B |
| قاعدة البيانات: |
BASE |