Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University , Hangzhou 310027, China.
Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37966, United States.
ACS Appl Mater Interfaces. 2018 Jan 10;10(1):32-36. doi: 10.1021/acsami.7b15873. Epub 2017 Dec 29.
Porous materials have already manifested their unique properties in a number of fields. Generally, all porous materials are in a solid state other than liquid, in which molecules are closely packed without porosity. "Porous" and "liquid" seem like antonyms. Herein, we report a new class of Type 3 porous liquids based on rational coupling of microporous framework nanoparticles as porous hosts with a bulky ionic liquid as the fluid media. Positron annihilation lifetime spectroscopy (PALS) and CO adsorption measurements confirm the successful engineering of permanent porosity into these liquids. Compared to common porous solid materials, as-synthesized porous liquids exhibited pronounced hysteresis loops in the CO sorption isotherms even at ambient conditions (298 K, 1 bar). The unique features of these novel porous liquids could bring new opportunities in many fields including gas separation and storage, air separation and regeneration, gas transport, and permanent gas storage at ambient conditions.
多孔材料在许多领域已经表现出其独特的性质。一般来说，所有的多孔材料都是固态的，而不是液态的，在固态中，分子紧密排列，没有孔隙。“多孔”和“液体”似乎是反义词。在此，我们报道了一类新型的基于微孔框架纳米粒子作为多孔主体与大体积离子液体作为流体介质合理偶联的 3 型多孔液体。正电子湮没寿命谱（PALS）和 CO 吸附测量证实了这些液体中永久性孔隙的成功构建。与常见的多孔固体材料相比，即使在环境条件（298 K，1 bar）下，合成的多孔液体在 CO 吸附等温线上也表现出明显的滞后环。这些新型多孔液体的独特性质可能为许多领域带来新的机遇，包括气体分离和储存、空气分离和再生、气体传输以及环境条件下的永久气体储存。
