催化作用
苯乙酮
查尔酮
产量(工程)
选择性
苯甲醛
化学
打赌理论
核化学
钼
溶剂
立方氧化锆
无机化学
材料科学
有机化学
冶金
陶瓷
作者
T.R. Gaydhankar,Trupti V. Kotbagi,Milind D. Nikalje,K.J. Waghmare
出处
期刊:Current catalysis
[Bentham Science]
日期:2014-10-24
卷期号:3 (3): 296-309
被引量:2
标识
DOI:10.2174/2211544703666140807222746
摘要
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.
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