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• W4313731375 endingPage "156380" @default.
• W4313731375 startingPage "156380" @default.
• W4313731375 abstract "Many applications of catalysts immobilized on solid supports like silica via bifunctional phosphine linkers are still hampered by their decomposition, leaching, agglomeration, and uncontrolled nanoparticle formation, all of which change their activities and selectivities. In general, the success of an immobilized catalyst is crucially dependent on the linker and its attachment to the oxide support. In this contribution, an improved method for covalently binding phosphine linkers to silica via ethoxysilane groups is described. This method leads to well-defined sub-monolayers of linkers on silica surfaces without cross-linking of the linkers, which typically leads to clogged pores and metal agglomeration during catalysis, thus entailing less active and selective catalysts. The novel immobilization method has been supported by multinuclear classical CP/MAS solid-state NMR spectroscopy, as well as suspension NMR of slurries. It has been demonstrated by TEM that nickel complexes coordinated by immobilized phosphine linkers in a well-defined sub-monolayer coverage do not form larger aggregates or nanoparticles during the catalytic cyclotrimerization of phenylacetylene under various conditions, in contrast to analogous complexes in homogeneous catalytic runs." @default.
• W4313731375 created "2023-01-08" @default.
• W4313731375 creator A5030061948 @default.
• W4313731375 creator A5047514945 @default.
• W4313731375 date "2023-04-01" @default.
• W4313731375 modified "2023-09-25" @default.
• W4313731375 title "Creating Well-Defined monolayers of phosphine linkers incorporating ethoxysilyl groups on silica surfaces for superior immobilized catalysts" @default.
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• W4313731375 doi "https://doi.org/10.1016/j.apsusc.2023.156380" @default.
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