Related Experiment Video
Updated: Aug 30, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
Published on: August 16, 2018
CO2-Driven reversible transfer of amine-functionalized ZIF-90 between organic and aqueous phases
Xiaoyan Pei1, Chunyu Tian1, Yanning Wang1
1College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, Henan, 464000, P. R. China. xiaoyanpei2009@163.com.
Abstract:
Phase transfer of metal-organic frameworks is highly desired in many areas, which remains a challenge. Herein, we present for the first time a CO2-driven reversible transfer of amine-functionalized ZIF-90 between organics and water. A mechanistic study showed that the switching is ascribed to the reversible generation of hydrophilic ammonium salts from the reaction of CO2 with the amines on ZIF-90. This unique system has been used for the coupling of trans-esterification reactions, product separation and component recycling for green sustainable processes. This work opens up a new avenue for performing reactions effectively with an easy separation process.
Related Concept Videos
Preparation of 1° Amines: Hofmann and Curtius Rearrangement Mechanism
Amides to Amines: LiAlH4 Reduction
Amide reduction requires two equivalents of the reducing agent, acting as a source of hydride ions. As shown in the figure, the reaction is initiated with a nucleophilic attack by the hydride ion at the carbonyl carbon to form a tetrahedral intermediate.
Amines to Amides: Acylation of Amines
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary...
Carboxylic Acids to Methylesters: Alkylation using Diazomethane
Carboxylic Acids to Esters: Acid-Catalyzed (Fischer) Esterification Mechanism
Amines to Alkenes: Cope Elimination

