Zn metal organic framework as a heterogeneous catalyst for the alkylation of toluene with benzyl bromide

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• 作者：Faezeh Farzaneh ; Saeideh Sadat Mortazavi
• 关键词：Zn ; metal organic framework ; Friedel–Crafts alkylation ; Toluene ; Benzyl bromide ; Heterogeneous catalyst
• 刊名：Reaction Kinetics, Mechanisms and Catalysis
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：120
• 期：1
• 页码：333-344
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Catalysis; Physical Chemistry; Industrial Chemistry/Chemical Engineering;
• 出版者：Springer Netherlands
• ISSN：1878-5204
• 卷排序：120

文摘

Zn metal organic framework (Zn-MOF) was prepared with 1,3,5-benzene-tricarboxylic acid (BTC), Zn(OAc)₂ and water under solvothermal condition and designated as Zn(BTC). It was characterized with XRD, FTIR and NH₃-TPD and used as an alkylation catalyst. It was found that the alkylation of toluene with benzyl bromide proceeds to completion within 4 h at 60 °C, affording para-benzyltoluene with 74 % selectivity. Compared to ZnCl₂, which catalyzes the partial conversion of toluene to para-benzyltoluene under optimum conditions, obtaining total conversion and higher selectivity with Zn(BTC) clearly reveals the key role of organic framework present in this catalyst. Zn(BTC) was also regenerated and reused three times in the cycle alkylation–regeneration with no significant loss of activity.