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Hoveyda–Grubbs type metathesis catalyst immobilized on mesoporous molecular sieves—The influence of pore size on the catalyst activity

Paper ID Volume ID Publish Year Pages File Format Full-Text
55621 47059 2012 7 PDF Available
Title
Hoveyda–Grubbs type metathesis catalyst immobilized on mesoporous molecular sieves—The influence of pore size on the catalyst activity
Abstract

New hybrid olefin metathesis catalysts were prepared by immobilization of Hoveyda–Grubbs type catalyst (commercially available as Zhan catalyst-1B) on the surface of mesoporous molecular sieves differing in pore size and architecture (MCM-41, MCM-48, and SBA-15) and conventional silica for a comparison. The activity of these catalysts was tested in RCM of (−)-β-citronellene, metathesis of 1-decene, ADMET of 1,9-decadiene, and in ROMP of cyclooctene and was found to increase significantly with the increasing pore size of the supports used. In all reactions, the activity of hybrid catalysts based on mesoporous molecular sieves was higher than that of catalyst using conventional silica as a support. In ROMP of cyclooctene, high molecular weight polymer (Mw = 300,000) in high yield (70–80%) was obtained with catalysts based on mesoporous supports, however, only 40% polymer yield was obtained using catalyst based on conventional silica.

Graphical abstractIn metathesis of citronellene, 1-decene, 1,9-decadiene, and cyclooctene the activity of hybrid catalysts using mesoporous molecular sieves as supports was found to increase with increasing pore size of support.Figure optionsDownload full-size imageDownload high-quality image (106 K)Download as PowerPoint slideHighlights•Hybrid olefin metathesis catalysts were prepared by immobilization of Hoveyda–Grubbs type catalyst on mesoporous molecular sieves supports. •Catalyst activity in metathesis of citronellene, 1-decene, and 1,9-decadiene increased with increasing pore size of supports. • ROMP of cyclooctene delivered high molecular weight polymers in high yields using catalysts on mesoporous supports.

Keywords
Olefin metathesis; Ring opening metathesis polymerization; Hoveyda–Grubbs catalyst; Mesoporous molecular sieves; Hybrid catalysts
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Hoveyda–Grubbs type metathesis catalyst immobilized on mesoporous molecular sieves—The influence of pore size on the catalyst activity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 179, Issue 1, 5 January 2012, Pages 123–129
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us