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

László, Krisztina and Manek, E. and Vavra, Sz. and Geissler, Erik and Domján, Attila (2012) Host-guest Interactions in Poly(N-isopropylacrylamide) Hydrogels. Chemistry Letters, 12 (41 SI). pp. 1055-1056. ISSN 0366-7022

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Abstract

Measurements by 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-isoacrylamide) (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.

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