Outer-Sphere Control of Catalysis on Surfaces: A Comparative Study of Ti(IV) Single-Sites Grafted on Amorphous versus Crystalline Silicates for Alkene Epoxidation.
The effect of outer-sphere environment on alkene epoxidation catalysis using an organic hydroperoxide oxidant is demonstrated for calix[4]arene-Ti single-sites grafted on amorphous vs crystalline delaminated zeotype (UCB-4) silicates as supports. A chelating calix[4]arene macrocyclic ligand helps en...
| Published in: | Journal of the American Chemical Society Vol. 140; no. 15; pp. 4956 - 4961 |
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| Main Authors: | , , , , , , , , , |
| Format: | Article |
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American Chemical Society
4/18/2018
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| Subjects: | |
| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=hlh&AN=129236683&site=ehost-live header: @attributes: shortDbName: hlh uiTerm: 129236683 longDbName: Humanities International Complete uiTag: AN controlInfo: bkinfo: jinfo: jid: 00027863 ACS jtl: Journal of the American Chemical Society issn: 00027863 maglogo: N pubinfo: dt: 4/18/2018 vid: 140 iid: 15 pid: 997 pub: American Chemical Society artinfo: ui: 129236683 10.1021/jacs.7b11467 ppf: 4956 ppct: 5 formats: tig: atl: Outer-Sphere Control of Catalysis on Surfaces: A Comparative Study of Ti(IV) Single-Sites Grafted on Amorphous versus Crystalline Silicates for Alkene Epoxidation. aug: au: Grosso-Giordano, Nicolás A. Schroeder, Christian Okrut, Alexander Solovyov, Andrew Schhöttle, Christian Chassé, Walter Marinkovic, Nebojša Koller, Hubert Zones, Stacey I. Katz, Alexander affil: Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, California 94720, United States Institut für Physikalische Chemie, Westfälische Wilhelms-Universität Münster, Münster 48149, Germany Department of Chemical Engineering, Columbia University, New York, New York 10027, United States Chevron Energy Technology Company, Richmond, California 94804, United States su: Catalysis Comparative studies Amorphous substances Silicates Alkenes sug: subj: Catalysis Comparative studies Amorphous substances Silicates Alkenes ab: The effect of outer-sphere environment on alkene epoxidation catalysis using an organic hydroperoxide oxidant is demonstrated for calix[4]arene-Ti single-sites grafted on amorphous vs crystalline delaminated zeotype (UCB-4) silicates as supports. A chelating calix[4]arene macrocyclic ligand helps enforce a constant Ti inner-sphere, as characterized by UV-visible and X-ray absorption spectroscopies, thus enabling the rigorous comparison of outer-sphere environments across different siliceous supports. These outer-sphere environments are characterized by solid-state ¹H NMR spectroscopy to comprise proximally organized silanols confined within 12 membered-ring cups in crystalline UCB-4, and are responsible for up to 5-fold enhancements in rates of epoxidation by Ti centers. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: Y dt: @attributes: year: 2018 holdings: @attributes: islocal: N |
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