Functions and applications of emerging metal–organic-framework liquids and glasses

Abstract

Traditional metal-organic-frameworks (MOFs) have been extensively studied and applied in various fields across chemistry, biology and engineering in the past decades. Recently, a family of emerging MOF liquids and glasses...

Flexible Hierarchical Polyimide/Polypyrrole/Carbon Nanofiber Composite Films for Tunable Electromagnetic Interference Shielding

“…After encapsulation with PI solution followed by drying to remove the acetone solvent, the PI/PPy/CF composite films with a mechanically strengthened multiple layered structure were obtained. 20 In the process of removing the solvent, the hydrogen bonds were formed between the C�O groups of PI and −NH− groups of PPy (Figure 1b), so that a smooth and dense PI layer was formed on the surface of the PPy/CF film, thereby achieving the purpose of packaging. 21 It is impossible to impregnate the PPy/CF films with PI precursor solution and then postcure them at high temperature, because PPy cannot resist high temperature.…”

“…Here, the soluble PI was synthesized using 6FDA and ME-MDA with a large number of side groups as monomers, making it completely dissolve in acetone with a mass content of 20 wt % after complete imidization. After encapsulation with PI solution followed by drying to remove the acetone solvent, the PI/PPy/CF composite films with a mechanically strengthened multiple layered structure were obtained . In the process of removing the solvent, the hydrogen bonds were formed between the CO groups of PI and –NH– groups of PPy (Figure b), so that a smooth and dense PI layer was formed on the surface of the PPy/CF film, thereby achieving the purpose of packaging …”

Amorphous MOFs for next generation supercapacitors and batteries

“…68 Due to the enhanced ion dynamics and the presence of isotropous conduction pathways, the glassy form of MOFs often exhibits superior ion conductivity over their crystalline phases, thereby improving the energy storage performances. 44,69,70 The heat treatment applied during the synthesis of MQG also serves as an activation step for solvent removal, which provides more active surface area and less potential solvent pollution with better processability than crystal. (Fig.…”

Porous and Meltable Metal–Organic Polyhedra for the Generation and Shaping of Porous Mixed-Matrix Composites

“…Melting has long been a widely employed method for transforming raw materials into shaped objects across various industries. − Recently, the application of melting as a processing technique for porous materials such as metal–organic frameworks (MOFs) has presented a unique opportunity to mold these materials into novel forms, including neat porous liquids and glasses. − Unfortunately, the current range of meltable MOFs is limited, as most MOFs decompose before they could even melt. − Additionally, the melting of MOFs involves the rupture of coordination bonds that define the MOF structure, leading to uncertainty regarding the final structure, porosity andby extensionfunction of the melted product. − …”