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Controllable acid-base bifunctionalized mesoporous silica: Highly efficient catalyst for solvent-free Knoevenagel condensation reaction

Paper ID Volume ID Publish Year Pages File Format Full-Text
50739 46812 2011 5 PDF Available
Title
Controllable acid-base bifunctionalized mesoporous silica: Highly efficient catalyst for solvent-free Knoevenagel condensation reaction
Abstract

A controllable acid-base bifunctionalized mesoporous catalyst with acidic sites and basic sites in adjacent arrangements was prepared via an in situ cleavage of sulfonamide bond on synthetic process. During Knoevenagel condensation reaction of aromatic aldehydes and ethyl cyanoacetate under microwave irradiation in solid media, the mesoporous bifunctionalized catalyst Me-A/B-SBA-15 exhibited higher catalytic activity than those of the corresponding amine-functionalized catalyst and the randomly-arranged acid-base catalyst, showing obvious acid-base cooperativity.

Graphical abstractControllable acid-base bifunctionalized mesoporous silica: highly efficient catalyst for solvent-free Knoevenagel condensation reaction.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► An acid-base bifunctional catalyst is prepared by a co-condensation method. ► Such a catalyst has the acidic and basic sites in adjacent arrangements. ► The catalyst exhibits higher catalytic activity than the monofunctional catalyst. ► There is the obvious acid-base cooperativity in Knoevenagel condensation.

Keywords
Heterogeneous catalysis; Mesoporous materials; Supported catalysts; C–C coupling
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Controllable acid-base bifunctionalized mesoporous silica: Highly efficient catalyst for solvent-free Knoevenagel condensation reaction
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 15, Issue 1, 15 November 2011, Pages 10–14
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