Intrinsically Porous Molecular Materials (IPMs) for Natural Gas and Benzene Derivatives Separations

Abstract

A shapedinduced liquid−liquid extraction strategy by using the highly stable (chemical, moisture, and thermal) macrocyclic host cucurbit[7]uril (CB7) was reported and showed high selectivity for the separation of disubstituted benzene isomers under ambient temperature and pressure.

Inhibition by Water during Heterogeneous Brønsted Acid Catalysis by Three-Dimensional Crystalline Organic Salts

“…In recent years, crystalline porous covalent organic frameworks (COFs) − and metal–organic frameworks (MOFs) − have been discovered and their applications broadly explored. The performance of their catalytic centers, either as part of the framework or as a separate entity embedded into the framework, is greatly enhanced as COFs and MOFs are free from the disadvantages inherent in conventional cross-linked polymeric systems .…”

Tuning the porosity of triangular supramolecular adsorbents for superior haloalkane isomer separations

“…[27][28][29][30] These activated TI, TA and MTA crystalline materials were characterized by powder X-ray diffraction (PXRD) analyses that served to confirm their crystallinity (Figure S11). [31][32][33][34] Thermogravimetric analysis (TGA) of the activated TI, TA and MTA revealed no appreciable weight loss below 280 °C, thus providing support for the conclusion that these activated materials were fully desolvated (Figures S12−S14). N 2 adsorption experiments gave a BET surface area of 1.67 m 2 /g, 3.65 m 2 /g, and 1.74 m 2 /g for the activated TI, TA and MTA, respectively (Figures S15−S17).…”

“…Although these values are low, previous reports on triangular macrocycles with little apparent porosity have served to reveal interesting molecular recognition features. 21,22,33 The adsorption performance of the activated TI, TA and MTA in the presence of chlorobutane isomers was tested through solidvapor adsorption experiments. Activated TI did not prove useful as an adsorbent for either 1-CBU or 2-CBU (Figure S18).…”

Engineering membranes with macrocycles for precise molecular separations

“…37 This section focuses on the molecular recognition properties of the macrocycles that are most commonly used for separation applications (Fig. 1) 38 .…”