Metal-organic frameworks as an efficient Pickering interfacial catalyst for the deacetalization-Knoevenagel tandem reaction

Stabilizing Pickering emulsions with solid catalysts at the oil-water interface is one of the most effective ways to develop environmentally friendly chemical processes. In this study, metal-organic frameworks (ZIF-8, UiO-66(Zr)-NH 2 , and MIL-101(Cr)-NH 2 ) with both Lewis acid and Brønsted base si...

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Published in:New journal of chemistry 2023-05, Vol.47 (18), p.896-8912
Main Authors: Bao, Yan-Sai, Liu, Wei, Dong, Zhen-Lin, Xing, Zhi-Qiang, Yang, Ming, Cui, Yong-He, Meng, Ling-Xu, Li, Liang-Cheng, Xu, Xiao-Meng, Han, Zheng-Bo, Zhang, Yu-Yang
Format: Article
Language:English
Subjects:
Cascade chemical reactions
Catalysts
Catalytic activity
Chemical activity
Chemical reactions
Chromium
Emulsions
Lewis acid
Metal-organic frameworks
Zirconium
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Summary:Stabilizing Pickering emulsions with solid catalysts at the oil-water interface is one of the most effective ways to develop environmentally friendly chemical processes. In this study, metal-organic frameworks (ZIF-8, UiO-66(Zr)-NH 2 , and MIL-101(Cr)-NH 2 ) with both Lewis acid and Brønsted base sites were synthesized to prepare Pickering emulsions to catalyse the deacetalization-Knoevenagel tandem reaction. Most importantly, the Pickering emulsion stabilized with ZIF-8 showed the highest catalytic activity and maintained good chemical stability. What is more, the spent Pickering emulsion could be easily reconstructed and it showed good reusability even after five cycles. Metal-organic frameworks were synthesized to prepare Pickering emulsions that showed excellent catalytic activity in the deacetalization-Knoevenagel tandem reaction.
ISSN:1144-0546
1369-9261
DOI:10.1039/d3nj00788j