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Encapsulation of a Porous Organic Cage into the Pores of a Metal–Organic Framework for Enhanced CO₂ Separation

Liang, Jun ; Nuhnen, Alexander ; Millan, Simon ; Breitzke, Hergen ; Gvilava, Vasily ; Buntkowsky, Gerd ; Janiak, Christoph (2022):
Encapsulation of a Porous Organic Cage into the Pores of a Metal–Organic Framework for Enhanced CO₂ Separation. (Publisher's Version)
In: Angewandte Chemie, 132 (15), pp. 6124-6129. Wiley-VCH, ISSN 0044-8249, e-ISSN 1521-3757,
DOI: 10.26083/tuprints-00020291,
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Item Type: Article
Origin: Secondary publication service
Status: Publisher's Version
Title: Encapsulation of a Porous Organic Cage into the Pores of a Metal–Organic Framework for Enhanced CO₂ Separation
Language: English
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 CO₂ 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 CO₂ are created in the resulting CB6@MIL-101 composites, leading to enhanced CO₂ uptake capacity and CO₂/N₂, CO₂/CH₄ 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.

Journal or Publication Title: Angewandte Chemie
Volume of the journal: 132
Issue Number: 15
Publisher: Wiley-VCH
Classification DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
Divisions: 07 Department of Chemistry > Physical Chemistry
Date Deposited: 10 Jan 2022 13:33
Last Modified: 10 Jan 2022 13:34
DOI: 10.26083/tuprints-00020291
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-202918
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20291
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