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A facile method for synthesis of amine-functionalized mesoporous zirconia and its catalytic evaluation in Knoevenagel condensation

Paper ID Volume ID Publish Year Pages File Format Full-Text
42047 45908 2010 7 PDF Available
Title
A facile method for synthesis of amine-functionalized mesoporous zirconia and its catalytic evaluation in Knoevenagel condensation
Abstract

Amine-functionalized mesoporous zirconia was prepared by a co-condensation method using silane (aminopropyltrimethoxysilane, APTES) and zirconium butoxide. The materials were characterized by X-ray diffraction, BET surface area analysis, 13C magic angle spinning-nuclear magnetic resonance (NMR), Fourier-transfer infrared spectroscopy (FTIR), transmittance electron micrography (TEM), and CHN analysis. FTIR and NMR results revealed the successful grafting of organic amines onto the surface of zirconia. The catalytic activities were investigated for liquid phase Knoevenagel condensation of various aromatic aldehydes with diethyl malonate. The catalysts showed excellent yield of products at room temperature in solvent-free condition.

Graphical abstractIn the Knoevenagel condensation reactions, the catalyst activity is mainly due to the structural basicity of the amine group. The reaction is initiated when a benzaldehyde molecule reacts with a surface amine to form an amine compound. The addition of diethyl malonate and the subsequent molecular rearrangement produces the final reaction product and water molecules.Figure optionsDownload full-size imageDownload high-quality image (29 K)Download as PowerPoint slide

Keywords
Mesoporous zirconia; Amine-functionalized; Knoevenagel condensation
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A facile method for synthesis of amine-functionalized mesoporous zirconia and its catalytic evaluation in Knoevenagel condensation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 381, Issues 1–2, 15 June 2010, Pages 226–232
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