The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1,3-Bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene, is researched, Molecular C21H24N2, CAS is 141556-42-5, about N-Heterocyclic Carbene Coordination to Surface Copper Sites in Selective Semihydrogenation Catalysts from Solid-State NMR Spectroscopy, the main research direction is heterocyclic carbene copper nanoparticle supported preparation catalyst semihydrogenation alkyne; solid state NMR heterocyclic carbene copper nanoparticle supported; crystal structure silica supported heterocyclic carbene copper nanoparticle; mol structure silica supported heterocyclic carbene copper nanoparticle; N-heterocyclic carbene; copper nanoparticles; nanoparticle functionalization; semihydrogenation; solid-state NMR.Related Products of 141556-42-5.
Supported metal nanoparticles are a very large class of heterogeneous catalysts. While detailed structure-activity relations require a mol.-level description of the interactions between the metal surfaces and ligands/substrates, this description is rarely accessible. Thus, most insights are derived from models based on single crystals. With the goal to understand alkyne semihydrogenation catalysts based on Cu functionalized with N-heterocyclic carbene (NHC), the authors cross this gap by studying NHC-stabilized mol. complexes, supported single sites and nanoparticles by solid-state NMR combined with computations. In SiO2-supported Cu single sites, Cu retains the coordination geometry observed in mol. compounds, while, for supported Cu nanoparticles, which are active and selective for the semihydrogenation of alkynes, NHC binding is favored at Cu adatoms atop of Cu surface, thus paralleling conclusions of surface science studies on single crystals.
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