Journal
CATALYSTS
Volume 10, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/catal10040438
Keywords
olefin metathesis; ruthenium; supported catalysts; metal-organic frameworks; SBA-15; microporous materials; boomerang effect
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Funding
- European Union from the European Regional Development under the Operational Programme Smart Growth
- Polish Ministry of Science and Higher Education [IdP 2012/0002/62]
- European Union from the European Regional Development Fund under the Operational Programme Innovative Economy, 2007-2013
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Promoted by homogeneous Ru-benzylidene complexes, the olefin metathesis reaction is a powerful methodology for C-C double bonds formation that can find a number of applications in green chemical production. A set of heterogeneous olefin metathesis pre-catalysts composed of ammonium-tagged Ru-benzylidene complexes 4 (commercial FixCat (TM) catalyst) and 6 (in-house made) immobilized on solid supports such as 13X zeolite, metal-organic framework (MOF), and SBA-15 silica were obtained and tested in catalysis. These hybrid materials were doped with various amounts of ammonium-tagged styrene derivative 5-a precursor of a spare benzylidene ligand-in order to enhance pre-catalyst regeneration via the so-called release-return boomerang effect. Although this effect was for the first time observed inside the solid support, we discovered that non-doped systems gave better results in terms of the resulting turnover number (TON) values, and the most productive were hybrid catalysts composed of 4@MOF, 4@SBA-15, and 6@SBA-15.
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