Grubbs Catalysts Immobilized on Mesoporous Molecular Sieves via Phosphine and Pyridine Linkers

被引：46

作者：

Bek, David ^{[1
]}

Balcar, Hynek ^{[1
]}

Zilkova, Nadezda ^{[1
]}

Zukal, Arnost ^{[1
]}

Horacek, Michal ^{[1
]}

Cejka, Jiri ^{[1
]}

机构：

[1] Acad Sci Czech Republic, J Heyrovsky Inst Phys Chem, CR-18223 Prague 8, Czech Republic

来源：

ACS CATALYSIS | 2011年 / 1卷 / 07期

关键词：

Grubbs catalysts; olefin metathesis; mesoporous molecular sieves; catalyst immobilization; hybrid catalysts; OLEFIN-METATHESIS CATALYSTS; RING-CLOSING METATHESIS; ELECTRON-WITHDRAWING LIGANDS; HOVEYDA-GRUBBS; RUTHENIUM CARBENES; CROSS-METATHESIS; COMPLEXES; SBA-15; REACTIVITY; DECOMPOSITION;

D O I：

10.1021/cs200090e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Hybrid catalysts for olefin metathesis were prepared by the immobilization of Ru alkylidenes (Grubbs catalysts) on mesoporous molecular sieves SBA-15 and MCM-41 having, the surface modified with molecules bearing dicyclo-hexylphosphine (PCy2) and pyridine end groups. Hybrid catalysts with Ru attached to the surface via PCy2 ligands exhibited higher activity and stability than those with Ru attached via pyridine ligands. The former catalysts exhibited a high activity in a series of metathesis reactions (RCM, ROMP, and cross-metathesis) reaching turnover numbers (TONs) from 200 to 2000 and being reusable several times. The filtration tests for all catalysts suggested that the solid catalysts were responsible for catalytic activity during the reactions. Only low Ru leaching was observed. A positive effect of the pore size of the support on catalyst activity was observed for the metathesis of methyl oleate.

引用

页码：709 / 718

页数：10

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