亚胺
氢键
共价键
硫酸
化学
化学工程
氢
材料科学
无机化学
有机化学
催化作用
分子
工程类
作者
Arjun Halder,Suvendu Karak,Matthew A. Addicoat,Saibal Bera,Amit Chakraborty,Shebeeb H. Kunjattu,Pradip Pachfule,Thomas Heine,Rahul Banerjee
标识
DOI:10.1002/anie.201802220
摘要
A rapid and scalable synthesis of six new imine-linked highly porous and crystalline COFs is presented that feature exceptionally high chemical stability in harsh environments including conc. H2 SO4 (18 m), conc. HCl (12 m), and NaOH (9 m). This is because of the presence of strong interlayer C-H⋅⋅⋅N hydrogen bonding among the individual layers, which provides significant steric hindrance and a hydrophobic environment around the imine (-C=N-) bonds, thus preventing their hydrolysis in such an abrasive environment. These COFs were further converted into porous, crystalline, self-standing, and crack-free COF membranes (COFMs) with extremely high chemical stability for their potential applications for sulfuric acid recovery. The as-synthesized COFMs exhibit unprecedented permeance for acetonitrile (280 Lm-2 h-1 bar-1 ) and acetone (260 Lm-2 h-1 bar-1 ).
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