Tallarek, Ulrich ; Hochstrasser, Janika ; Ziegler, Felix ; Huang, Xiaohui ; Kübel, Christian ; Buchmeiser, Michael R. (2021)
Olefin ring‐closing metathesis under spatial confinement: morphology−transport relationships.
In: ChemCatChem, 13 (1)
doi: 10.1002/cctc.202001495
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
Spatial confinement effects on hindered transport in mesoporous silica particles are quantified using reconstructions of their morphology obtained by electron tomography as geometrical models in direct diffusion simulations for passive, finite‐size tracers. We monitor accessible porosity and effective diffusion coefficients resulting from steric and hydrodynamic interactions between tracers and pore space confinement as a function of λ=dtracer/dmeso, the ratio of tracer to mean mesopore size. For λ=0, pointlike tracers reproduce the true diffusive tortuosities. For λ>0, derived hindrance factors quantify the extent to which diffusion through the materials is hindered compared with free diffusion in the bulk liquid. Morphology‐transport relationships are then discussed with respect to the immobilization, formation, and transport of key molecular species in the ring‐closing metathesis of an α,ω‐diene to macro(mono)cyclization product and oligomer, with a 2nd‐generation Hoveyda‐Grubbs type catalyst immobilized inside the mesopores of the particles.
| Typ des Eintrags: | Artikel | ||||
|---|---|---|---|---|---|
| Erschienen: | 2021 | ||||
| Autor(en): | Tallarek, Ulrich ; Hochstrasser, Janika ; Ziegler, Felix ; Huang, Xiaohui ; Kübel, Christian ; Buchmeiser, Michael R. | ||||
| Art des Eintrags: | Bibliographie | ||||
| Titel: | Olefin ring‐closing metathesis under spatial confinement: morphology−transport relationships | ||||
| Sprache: | Englisch | ||||
| Publikationsjahr: | 2021 | ||||
| Ort: | Weinheim | ||||
| Verlag: | Wiley-VCH | ||||
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | ChemCatChem | ||||
| Jahrgang/Volume einer Zeitschrift: | 13 | ||||
| (Heft-)Nummer: | 1 | ||||
| DOI: | 10.1002/cctc.202001495 | ||||
| Zugehörige Links: | |||||
| Kurzbeschreibung (Abstract): | Spatial confinement effects on hindered transport in mesoporous silica particles are quantified using reconstructions of their morphology obtained by electron tomography as geometrical models in direct diffusion simulations for passive, finite‐size tracers. We monitor accessible porosity and effective diffusion coefficients resulting from steric and hydrodynamic interactions between tracers and pore space confinement as a function of λ=dtracer/dmeso, the ratio of tracer to mean mesopore size. For λ=0, pointlike tracers reproduce the true diffusive tortuosities. For λ>0, derived hindrance factors quantify the extent to which diffusion through the materials is hindered compared with free diffusion in the bulk liquid. Morphology‐transport relationships are then discussed with respect to the immobilization, formation, and transport of key molecular species in the ring‐closing metathesis of an α,ω‐diene to macro(mono)cyclization product and oligomer, with a 2nd‐generation Hoveyda‐Grubbs type catalyst immobilized inside the mesopores of the particles. |
||||
| Alternatives oder übersetztes Abstract: |
|
||||
| Freie Schlagworte: | electron tomography, heterogeneous catalysis, hindered diffusion, mesoporous materials, metathesis | ||||
| Zusätzliche Informationen: | This article also appears in: Catalysis in Confined Spaces |
||||
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 660 Technische Chemie | ||||
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > In-Situ Elektronenmikroskopie |
||||
| Hinterlegungsdatum: | 13 Feb 2024 07:48 | ||||
| Letzte Änderung: | 13 Feb 2024 07:48 | ||||
| PPN: | |||||
| Zugehörige Links: | |||||
| Export: | |||||
| Suche nach Titel in: | TUfind oder in Google | ||||
Verfügbare Versionen dieses Eintrags
-
Olefin Ring‐closing Metathesis under Spatial Confinement: Morphology−Transport Relationships. (deposited 12 Feb 2024 13:55)
- Olefin ring‐closing metathesis under spatial confinement: morphology−transport relationships. (deposited 13 Feb 2024 07:48) [Gegenwärtig angezeigt]
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum