Versatile functionalization platform of biporous poly(2-hydroxyethyl methacrylate)-based materials: Application in heterogeneous supported catalysis

This paper highlights the straightforward and versatile functionalization of biporous poly(2-hydroxyethyl methacrylate) (PHEMA)-based networks obtained from the double porogen templating approach, and their subsequent utilization as efficient catalytic supports in heterogeneous supported catalysis....

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Bibliographic Details
Published in:	Reactive & functional polymers Vol. 121; pp. 91 - 100
Main Authors:	Ly, H.B., Poupart, R., Carbonnier, B., Monchiet, V., Le Droumaguet, B., Grande, D.
Format:	Journal Article
Language:	English
Published:	Amsterdam Elsevier B.V 01-12-2017 Elsevier BV
Subjects:	Carbonyls Catalysis Catalysts Doubly porous polymeric materials Gold Gold nanoparticles Hydroxyl groups Nanoparticles Nitrophenol Organic chemistry Polyhydroxyethyl methacrylate Porogenic agents Spark plasma sintering Supported catalysis Spark plasma sintering Supported catalysis Doubly porous polymeric materials Porogenic agents Gold nanoparticles
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Summary:	This paper highlights the straightforward and versatile functionalization of biporous poly(2-hydroxyethyl methacrylate) (PHEMA)-based networks obtained from the double porogen templating approach, and their subsequent utilization as efficient catalytic supports in heterogeneous supported catalysis. Advantage of the availability of hydroxyl groups within the PHEMA-based frameworks was taken through chemical modification with carbonyl diimidazole. This key activation led to miscellaneous functionalization reactions of the materials via nucleophilic substitution or thiol-ene/thiol-yne “click” additions of functional organic molecules mainly containing amino or thiol groups. Further, in-situ generation and immobilization of gold nanoparticles (GNPs) on selected thiol- or amine-functionalized biporous frameworks allowed for the preparation of innovative GNP@PHEMA materials. The as-obtained hybrid frameworks could efficiently be used as supported catalysts in NaBH4-mediated reduction of 4-nitrophenol. The reusability of amine-bearing hybrid catalysts is proved over 5 successive 1h-cycles with stable yields around 90%. [Display omitted] •Double porogen approach combined with nucleophilic substitutions and “click” additions yields functional biporous polymers.•Immobilization of in-situ generated gold nanoparticles on thiol- or amine-functionalized biporous networks is achieved.•Gold nanoparticles anchored on amine-bearing biporous networks are used as efficient and reusable supported catalysts.•Nanogold anchoring and catalytic activity strongly depend on chemical function at pore surface of polymeric supports.
ISSN:	1381-5148 1873-166X
DOI:	10.1016/j.reactfunctpolym.2017.10.024