Quest for pore size effect on the catalytic property of defect-engineered MOF-808-SO4 in the addition reaction of ISOBUTYLENE (cas 115-11-7) with ethylene glycol

Add time:07/19/2019    Source:sciencedirect.com

In this article, we use defect engineering approach to fine-tune the pore size of MOF-808-SO4. A series of defective MOF-808-SO4 with different pore size were prepared by varying the amount of isophthalic acid as the defective ligand during the synthesis. We obtained a linear correlation between the concentration of the defective ligand and the pore size via regression analysis. The pore size exerts a significant effect on the catalytic activity in the addition reaction of ISOBUTYLENE (cas 115-11-7) with ethylene glycol. The highest conversion of ethylene glycol was found over MOF-808-20%-SO4 (2.25 nm) with the largest pore size, whereas MOF-808-5%-SO4 (1.46 nm) and MOF-808-10%-SO4 (1.53 nm) exhibited higher selectivity toward ethylene glycol mono-tert-butyl ether. There is a linear correlation between the pore size and catalytic activity only when the pore size ranges from 1.4 to 2.0 nm. MOF-808-15%-SO4 with the pore size of 1.99 nm exhibits the highest yield of ethylene glycol mono-tert-butyl ether.

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