Gold(I) NHC catalysts immobilized to amphiphilic block copolymers: a versatile approach to micellar gold catalysis in water

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dc.contributor.authorPetersen, Hanne
dc.contributor.authorBallmann, Monika
dc.contributor.authorKrause, Norbert
dc.contributor.authorWeberskirch, Ralf
dc.date.accessioned2024-02-12T11:58:32Z
dc.date.available2024-02-12T11:58:32Z
dc.date.issued2022-06-23
dc.description.abstractFifteen gold(I)-NHC-functionalized amphiphilic block copolymers that differ in the type of linker (ethyl, pentyl, octyl and benzyl) that attaches the gold(I) NHC catalyst to the block copolymer backbone, as well as, the substitution pattern of the NHC ligand (i. e. mesityl, methyl, 2,6-diisopropylphenyl and n-hexyl) were synthesized by a reversible addition and fragmentation transfer (RAFT) polymerization process. Micelle formation of the gold(I) NHC polymers was analyzed by electron microscopy and dynamic light scattering and revealed spherical and rod-like particles from 12 to 96 nm. In the micellar, gold(I) catalyzed cycloisomerization of an allene to the corresponding dihydrofuran, linker flexibility and substitution pattern of the NHC-ligand showed a strong effect on the catalytic activity. Best results were obtained were obtained for gold(I) NHC catalysts bound to the polymer backbone by pentyl linker whereas the rather stiff benzyl linker gave lowest catalyst conversion. Moreover, the polymer catalyst could be recycled in four consecutive runs and gave activities from 35 to 84 % in the fourth run and underscores the importance of fine tuning structural parameters to achieve high conversion under micellar reaction conditions.en
dc.identifier.urihttp://hdl.handle.net/2003/42321
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-24158
dc.language.isoende
dc.relation.ispartofseriesChemCatChem;14(18)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/de
dc.subjectGold catalysisen
dc.subjectMicellesen
dc.subjectPolymersen
dc.subjectSupported catalystsen
dc.subjectSustainable chemistryen
dc.subject.ddc540
dc.subject.rswkGoldde
dc.subject.rswkKatalysatorde
dc.subject.rswkMicellede
dc.subject.rswkPolymerede
dc.subject.rswkGrüne Chemiede
dc.titleGold(I) NHC catalysts immobilized to amphiphilic block copolymers: a versatile approach to micellar gold catalysis in wateren
dc.typeTextde
dc.type.publicationtypeResearchArticlede
dcterms.accessRightsopen access
eldorado.secondarypublicationtruede
eldorado.secondarypublication.primarycitationH. Petersen, M. Ballmann, N. Krause, R. Weberskirch, ChemCatChem 2022, 14, e202200727.de
eldorado.secondarypublication.primaryidentifierhttps://doi.org/10.1002/cctc.202200727de

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