Commercial macroporous strongly acidic ion-exchange resin (Bayer UCP 118) in its acidic and Na+ forms and a resin/Pd composite were investigated by means of electron spin resonance (ESR) and pulse field gradient spin echo-nuclear magnetic resonance (PGSE-NMR) techniques, to determine their molecular accessibility to 2,2,6,6-tetramethyl-4-oxo-1-oxypiperidine (TEMPONE) dissolved in water and the molecular mobility of both TEMPONE and water inside their accessible domains. The paramagnetic probe and water itself occupy both the micro- and macroporous domains of the resin particles, among which a rapid exchange is observed. (C) 2000 Elsevier Science B.V. All rights reserved.
Metal palladium dispersed inside macroporous ion-exchange resins: rotational and translational mobility inside the polymer network / A. A., D'Archivio; Galantini, Luciano; E., Tettamanti; A., Panatta; B., Corain. - In: JOURNAL OF MOLECULAR CATALYSIS. A: CHEMICAL. - ISSN 1381-1169. - STAMPA. - 157:1-2(2000), pp. 269-273. [10.1016/s1381-1169(00)00156-4]
Metal palladium dispersed inside macroporous ion-exchange resins: rotational and translational mobility inside the polymer network
GALANTINI, Luciano;
2000
Abstract
Commercial macroporous strongly acidic ion-exchange resin (Bayer UCP 118) in its acidic and Na+ forms and a resin/Pd composite were investigated by means of electron spin resonance (ESR) and pulse field gradient spin echo-nuclear magnetic resonance (PGSE-NMR) techniques, to determine their molecular accessibility to 2,2,6,6-tetramethyl-4-oxo-1-oxypiperidine (TEMPONE) dissolved in water and the molecular mobility of both TEMPONE and water inside their accessible domains. The paramagnetic probe and water itself occupy both the micro- and macroporous domains of the resin particles, among which a rapid exchange is observed. (C) 2000 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
