Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 2, Issue 3, Pages 486-492Publisher
AMER CHEMICAL SOC
DOI: 10.1021/sc400391r
Keywords
Periodic mesoporous silica; Scandium triflate; Lewis acid; Water medium organic synthesis
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Funding
- Natural Science Foundation of China [21107071, 51273112]
- PCSIRT [1RT1269]
- Shanghai Government [10dj1400100, 13QA1402800]
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Phenyl-bridged periodic mesoporous organosilica modified with sodium benzenesulfonate groups (NaSO3Ph-PMO) was frabicated by template-assembled co-condensation and subsequent ion-exchange processes. This functionalized support efficiently anchored scandium triflate to generate a mcsbporous Lewis acid catalyst (Sc(OTf)(2)-SO3.ph-PMO). It exhibited superior catalytic reactivity compared to those of the homogeneous catalyst scandium triflate and Sc(OTf)(2)-SO3.ph-SBA-15, without the phenyl groups inside the mesoporous wall of the.water medium Barbier-Grignard and Mukaiyama Aldol reactions. The physico-chemical characterizations demonstrated that its excellent catalytic performance was due to its ordered mesoporous channel and hydrophobicity microenvironment, which could stabilize and concentrate the substances as well as decrease intrinsic mass transfer resistance. Furthermore, the Sc(OTf)(2)-SO3.ph-PMO catalyst retained high catalytic reactivity even after 10 reuses, confirming its excellent catalytic stability.
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