Type of Publication: | Journal article |
Author: | Polarz, Sebastian; Voelker, B.; Jeremias, Felix |
Year of publication: | 2010 |
Published in: | Dalton Trans. ; 39 (2010), 2. - pp. 577-584. - ISSN 1477-9226. - eISSN 1477-9234 |
Pubmed ID: | 20023996 |
DOI (citable link): | https://dx.doi.org/10.1039/B911795B |
Summary: |
It has been recognized previously that inside nanosized cavities like in mesoporous materials a small ensemble situation can be realized. The limited number of reactants per confinement leads to unusual chemical behaviour whenever inter- vs. intramolecular pathways compete against each other. Therefore, the metathesis reaction might represent a chemical process for which the product distribution is influenced by a confining reaction field. In the current paper we report about the unusual reactivity of the Grubbs generation I catalyst inside mesoporous silica materials. It has been observed that due to a combination of confinement and surface effects the Grubbs catalyst is not stable inside small pores. It quickly rearranges to a variety of unexpected products. However, the undesired deactivation of the catalyst can be prohibited by surface modification of the silica surfaces.
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Subject (DDC): | 540 Chemistry |
Keywords: | matrix-isolation spectroscopy, single-molecule spectroscopy, olefin metathesis, nanoporous materials, hybride materials, porous materials, silica, enantioselectivity, zeolite, crystal |
Bibliography of Konstanz: | Yes |
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POLARZ, Sebastian, B. VOELKER, Felix JEREMIAS, 2010. Metathesis catalysts in confining reaction fields-confinement effects vs. surface effects. In: Dalton Trans.. 39(2), pp. 577-584. ISSN 1477-9226. eISSN 1477-9234. Available under: doi: 10.1039/B911795B
@article{Polarz2010-01-14Metat-13970, title={Metathesis catalysts in confining reaction fields-confinement effects vs. surface effects}, year={2010}, doi={10.1039/B911795B}, number={2}, volume={39}, issn={1477-9226}, journal={Dalton Trans.}, pages={577--584}, author={Polarz, Sebastian and Voelker, B. and Jeremias, Felix} }
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