Host-Guest Interactions in Poly(N-isopropylacrylamide) Hydrogels

Krisztina Laszlo (1) , Enikő Manek (1) , Szilvia Vavra (1) , Erik Geissler (2) , Attila Domjan (3)

1 Department of Physical Chemistry and Materials Science
2 BIOP-LIPhy - BIOP - Fluctuations, Régulation et Evolution des Systèmes Vivants
3 Institute of Organic Chemistry [Budapest]

Measurements by differential scanning calorimetry (DSC), small-angle neutron scattering (SANS), and 1H combined rotation and multiple-pulse NMR spectroscopy (CRAMPS) indicate that small aromatic molecules dissolved in poly(N-isopropylacryl-amide) (pNIPA) hydrogels modify the temperature of the volume phase transition (TVPT) in this system by partially shielding the NIPA side-chains from the water molecules and disrupting their organization. The strength of the interaction increases in the order pyrocatechol < phenol < resorcinol < phloroglucinol.

Domaines: Chimie-Physique [physics.chem-ph]

Krisztina Laszlo, Enikő Manek, Szilvia Vavra, Erik Geissler, Attila Domjan. Host-Guest Interactions in Poly(N-isopropylacrylamide) Hydrogels. Chemistry Letters, 2012, 41, pp.1055-1056. ⟨10.1246/cl.2012.1055⟩. ⟨hal-00817283⟩