General Way To Construct Micro- and Mesoporous Metal-Organic Framework-Based Porous Liquids
General Way To Construct Micro- and Mesoporous Metal-Organic Framework-Based Porous Liquids
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构建微孔和介孔金属有机骨架多孔液体的一般方法
DOI：
10.1021/jacs.9b08458
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发表时间：
2019-12-18
影响因子：
15
通讯作者：
Li, Tao
中科院分区：
文献类型：
--
作者：
He, Sanfeng;Chen, Lihan;Li, Tao
我们报道了一类新的多孔液体（PLs）使用内部功能化的金属有机框架（MOF）颗粒作为孔载体和聚（二甲基硅氧烷）作为大体积溶剂。使用可推广的非共价表面引发的受控自由基聚合技术，一系列的等网格UiO-66颗粒分散在具有优异的均匀性和胶体稳定性的液体PDMS基质中。得益于PDMS的固有特性，PL表现出低蒸气压、高热稳定性和低至-35 ° C的流动性。归因于PDMS的体积和其固有的高渗透性，MOF填料的吸附性质可以在很大程度上保留在它们各自的PL中，如通过低压CO2、N-2、CO2和H2O吸附等温线所证实的。即使在储存15个月后，PL的永久孔隙率也可以在很大程度上保持。最后，我们证明，通过调整PDMS的分子量和聚合物链结构，它是可能的，以保持永久的多孔性的中孔MOF，MIL-101（铬），在PL。
We report a new class of porous liquids (PLs) using internally functionalized metal-organic framework (MOF) particles as pore carriers and poly(dimethylsiloxane) as bulky solvents. Using a generalizable noncovalent surface-initiated controlled radical polymerization technique, a series of isoreticular UiO-66 particles were dispersed in a liquid PDMS matrix with excellent homogeneity and colloidal stability. Benefiting from the inherent properties of PDMS, the PLs exhibit low vapor pressure, high thermal stability, and fluidity down to -35 degrees C. Attributed to the bulkiness of PDMS and its inherent high permeability, the sorption properties of the MOF fillers can be largely retained in their respective PLs as confirmed by low-pressure CO2, N-2, Xe, and H2O sorption isotherms. The permanent porosity of the PLs can also be largely preserved even after 15 months of storage. Finally, we demonstrate that by tuning the molecular weight and polymer chain architecture of PDMS, it is possible to preserve the permanent porosity of a mesoporous MOF, MIL-101(Cr), within a PL.