Encapsulation of a Porous Organic Cage into the Pores of a Metal-Organic Framework for Enhanced CO Separation

Overview

Journal Angew Chem Int Ed Engl

Specialty Chemistry

Date 2020 Jan 9

PMID 31912916

Citations 12

Authors

Jun Liang

Alexander Nuhnen

Simon Millan

Hergen Breitzke

Vasily Gvilava

Gerd Buntkowsky

Christoph Janiak

Affiliations

Soon will be listed here.

Abstract

We present a facile approach to encapsulate functional porous organic cages (POCs) into a robust MOF by an incipient-wetness impregnation method. Porous cucurbit[6]uril (CB6) cages with high CO affinity were successfully encapsulated into the nanospace of Cr-based MIL-101 while retaining the crystal framework, morphology, and high stability of MIL-101. The encapsulated CB6 amount is controllable. Importantly, as the CB6 molecule with intrinsic micropores is smaller than the inner mesopores of MIL-101, more affinity sites for CO are created in the resulting CB6@MIL-101 composites, leading to enhanced CO uptake capacity and CO /N , CO /CH separation performance at low pressures. This POC@MOF encapsulation strategy provides a facile route to introduce functional POCs into stable MOFs for various potential applications.

Citing Articles

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