Synthesis, Characterization and Catalytic Activity of Molybdenum Oxide Supported Zirconia Catalysts for Solvent-free Synthesis of Chalcones

Author(s): Tejas R. Gaydhankar, Trupti V. Kotbagi, Milind D. Nikalje, Kasinath J. Waghmare.

Journal Name:Current Catalysis

Volume 3 , Issue 3 , 2014

Graphical Abstract:


Abstract:

Solvent-free Claisen-Schmidt condensation (CSC) for the synthesis of chalcone has been studied using MoO3/ZrO2 material as solid acid catalyst. A series of MoO3/ZrO2 catalysts with various MoO3 loadings (10-30 wt%) were prepared using modified precipitation method. The catalysts were extensively characterized using various techniques viz., TG-DTA, XRD, N2 Sorption, BET-surface area, NH3-TPD, Raman and FT-IR spectroscopies, AAS, EDX, TEM and SEM. The detailed parametric studies were carried out to optimize the reaction parameters in order to achieve maximum selectivity with high % yield of chalcones. Substituted benzaldehyde and acetophenone were used as reactants to study the effect of electron withdrawing and electron donating groups on the activity of catalyst. 15 wt% MoO3/ZrO2 catalyst prepared using modified preparation technique proved to be an excellent heterogeneous catalyst for solvent free synthesis of chalcone with yield as high as 93 %, by using only 1.5 wt% of catalyst.

Keywords: Chalcone, modified precipitation, molybdenum, raman, zirconia.

Rights & PermissionsPrintExport

Article Details

VOLUME: 3
ISSUE: 3
Year: 2014
Page: [296 - 309]
Pages: 14
DOI: 10.2174/2211544703666140807222746
Price: $58