Transforming Porous Organic Cages into Porous Ionic Liquids via a Supramolecular Complexation Strategy

被引：144

作者：

Jie, Kecheng ^{[1
,2
]}

Onishi, Nicole ^{[3
]}

Schott, Jennifer A. ^{[1
,2
]}

Popovs, Ilja ^{[2
]}

Jiang, De-en ^{[3
]}

Mahurin, Shannon ^{[2
]}

Dai, Sheng ^{[1
,2
]}

机构：

[1] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

[2] Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37831 USA

[3] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2020年 / 59卷 / 06期

关键词：

crown ethers; ionic liquids; microporous materials; porous liquids; porous organic cages; ELECTROSTATIC-ASSISTED LIQUEFACTION; SOLVENTS;

D O I：

10.1002/anie.201912068

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Porous liquids are a type of porous materials that engineer permanent porosity into unique flowing liquids, exhibiting promising functionalities for a variety of applications. Here a Type I porous liquid is synthesized by transforming porous organic cages into porous ionic liquids via a supramolecular complexation strategy. Simple physical mixing of 18-crown-6 with task-specific anionic porous organic cages affords a porous ionic liquid with anionic porous organic cages as the anionic parts and 18-crown-6/potassium ion complexes as the cationic parts. In contrast, mixing of 15-crown-5 and anionic porous organic cages in a 2:1 ratio gives only solids, while the addition of excess 15-crown-5 affords a Type II porous liquid. The permanent porosity in the cage-based porous liquids has been also confirmed by molecular simulation, positron (e(+)) annihilation lifetime spectroscopy, and enhanced gas sorption capacity compared with pure crown ethers.

引用

页码：2268 / 2272

页数：5

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