Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industrial and Food Engineering, Guangxi University, Nanning 530004, China.
Int J Mol Sci. 2023 Jul 14;24(14):11480. doi: 10.3390/ijms241411480.
Herein, we report the synthesis of bimetal-organic frameworks (BMOFs) with both Brønsted and Lewis acidities, in which phosphotungstic acid (PTA) was encapsulated in BMOFs. It is efficient in converting starch to 5-hydroxymethyl-furfural (HMF) in deep eutectic solvents (DESs) such as choline chloride and formic acid. The highest yield of HMF (37.94%) was obtained using P/BMOFs to catalyze starch in a mixed solvent system comprising DESs and ethyl acetate (EAC) (/; 2:3) at 180 °C and a reaction time of 10 min. Employing a DES as a cocatalyst and solvent reduced the use of organic solvents. The catalyst showed adequate reusability, and the HMF yield only decreased by 2.88% after six cycles of reuse compared with that of the initial catalyst. This study demonstrates the application potential of BMOFs in the conversion of biomass to useful molecules with commercial and/or research value.
本文报道了具有 Brønsted 和路易斯酸度的双金属有机骨架（BMOFs）的合成，其中磷钨酸（PTA）被封装在 BMOFs 中。它能够在深共熔溶剂（DESs）如氯化胆碱和甲酸中高效地将淀粉转化为 5-羟甲基糠醛（HMF）。使用 P/BMOFs 在 180°C 和 10 分钟的反应时间下，在由 DES 和乙酸乙酯（EAC）（/；2:3）组成的混合溶剂体系中催化淀粉，可获得最高 37.94%的 HMF 收率。使用 DES 作为共催化剂和溶剂减少了有机溶剂的使用。该催化剂具有良好的可重复使用性，与初始催化剂相比，重复使用六次后 HMF 的收率仅下降了 2.88%。本研究证明了 BMOFs 在将生物质转化为具有商业和/或研究价值的有用分子方面的应用潜力。
