Department of Inorganic Chemistry and Technology, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia.
Graduate School, University of Nova Gorica, Vipavska 13, SI-5000 Nova Gorica, Slovenia.
Molecules. 2021 Mar 12;26(6):1573. doi: 10.3390/molecules26061573.
The use of green solvents as an alternative to dimethylformamide (DMF) in the synthesis of zeolitic imidazolate framework-90 (ZIF-90) was investigated. Two biobased aprotic dipolar solvents Cyrene and γ-valerolactone (GVL) proved to successfully replace DMF in the synthesis at room temperature with a high product yield. While the Cyrene-based product shows reduced porosity after activation, the use of GVL resulted in materials with preserved crystallinity and porosity after activation, without prior solvent exchange and a short treatment at 200 °C. The primary particles of 30 nm to 60 nm in all products further form agglomerates of different size and interparticle mesoporosity, depending on the type and molar ratios of solvents used.
研究了使用绿色溶剂替代二甲基甲酰胺（DMF）在沸石咪唑酯骨架-90（ZIF-90）合成中的应用。两种生物基非质子偶极体溶剂 Cyrene 和γ-戊内酯（GVL）被证明可以在室温下成功替代 DMF，且产物收率高。虽然基于 Cyrene 的产物在活化后显示出较低的孔隙率，但使用 GVL 可以在不进行溶剂交换和在 200°C 下短时间处理的情况下，得到保留结晶度和孔隙率的材料。所有产物的初级颗粒在 30nm 到 60nm 之间，进一步形成不同大小的团聚体和颗粒间介孔，这取决于所使用的溶剂类型和摩尔比。
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