Tunable Latency of Hydrosilylation Catalyst by Ligand Density on Nanoparticle Supports.

ABSTRACT: Functionalizing inorganic particles with organic ligands is a common technique for heterogenizing organometallic catalysts. We describe how coordinating molecular platinum to silica nanoparticles functionalized with a high density of norbornene ligands causes unexpected latency of the catalytic activity in hydrosilylation reactions when compared to an identical reaction in which the norbornene is not tethered (2 % vs 97 % conversion in 1 h). Performing the hydrosilylation at elevated temperature (70 °C) suppresses this activity delay, suggesting the usefulness of this technique towards temperature-triggered catalysis. We demonstrate that this latency is related to ligand density on the particle surface, chemical structure of the norbornene, and silica nanoparticle topology. We also establi

SUBMITTER: Miller SA 

PROVIDER: S-EPMC10107349 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature