Gel-type resin poly-acrylonitrile (30 mol%)–N,N-dimethylacrylamide (66 mol%)–ethylenedimethacrylate (4 mol%) (ADE) is obtained in very high yield with -rays-sustained polymerisation in mass. Water-swollen ADE microparticles react readily with [PdCl4 2−] in water to give a macromolecular complex likely to be . The material undergoes facile reduction to a Pd0/ADE nanocomposite, in which a surprisingly non-homogeneous distribution of Pd0 nanoclusters suggests a remarkable inhomogeneity in the distribution of the –CN groups through the polymer framework. This circumstance is attributed to a marked occurrence of a block-type polymerisation of the acrylonitrile leading to spheroidal domains that are particularly rich in –CN functionalities. Pd0/ADE appears to be an active, re50 usable, mechanically and chemically stable catalyst in the model hydrogenation reaction of cyclohexene in methanol under moderate conditions, carried out in batch reactors.
Nanoclustered palladium(0) supported on a gel-type poly-acrylonitrile-N,N-dimethylacrylamide-ethylenedimethacrylate resin: Nanostructural aspects and catalytic behaviour
CENTOMO, PAOLO;CAMPESTRINI, SANDRO;CORAIN, BENEDETTO
2007
Abstract
Gel-type resin poly-acrylonitrile (30 mol%)–N,N-dimethylacrylamide (66 mol%)–ethylenedimethacrylate (4 mol%) (ADE) is obtained in very high yield with -rays-sustained polymerisation in mass. Water-swollen ADE microparticles react readily with [PdCl4 2−] in water to give a macromolecular complex likely to be . The material undergoes facile reduction to a Pd0/ADE nanocomposite, in which a surprisingly non-homogeneous distribution of Pd0 nanoclusters suggests a remarkable inhomogeneity in the distribution of the –CN groups through the polymer framework. This circumstance is attributed to a marked occurrence of a block-type polymerisation of the acrylonitrile leading to spheroidal domains that are particularly rich in –CN functionalities. Pd0/ADE appears to be an active, re50 usable, mechanically and chemically stable catalyst in the model hydrogenation reaction of cyclohexene in methanol under moderate conditions, carried out in batch reactors.Pubblicazioni consigliate
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