Synthesis and photochemical modification of monolayer thin MOF flakes for incorporation in defect free polymer composites

verfasst von

Karen D.J. Hindricks, Jessica Erdmann, Celine Marten, Timo Herrmann, Peter Behrens, Andreas Schaate

Abstract

Metal-organic frameworks (MOFs) with benzophenone linker molecules are characterized by their ability to undergo photochemical postsynthetic modification. While this approach opens up almost unlimited possibilities for tailoring materials to specific applications, the processability of the large particles is still lacking. In this work, we present a new approach to fabricate micro flakes of the stable Zr-bzpdc-MOF (bzpdc = benzophenone-4-4′-dicarboxylate) with a thickness of only a few monolayers. The crystalline and nanoporous flakes form dispersions in acetone that are stable for months. Embedding the flakes in polymer composites was investigated as one of many possible applications. Zr-bzpdc-MOF micro flakes were decorated with poly(dimethylsiloxane) (PDMS) via a photochemical postsynthetic modification and incorporated into silicon elastomers. The PDMS functionalization allows covalent cross-linking between the MOF and the polymer while maintaining the porosity of the MOF. The resulting hybrid materials provide defect-free interfaces and show preferential adsorption of CO₂ over CH₄, making them attractive for gas separation or sensing applications. The work should serve as a basis for bringing bzpdc-MOFs into real-world applications - in polymeric membranes, but also beyond.

Organisationseinheit(en)

Institut für Anorganische Chemie
PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme
Laboratorium für Nano- und Quantenengineering

Typ

Artikel

Journal

RSC Advances

Band

13

Seiten

27447-27455

Anzahl der Seiten

9

ISSN

2046-2069

Publikationsdatum

13.09.2023

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Chemie (insg.), Chemische Verfahrenstechnik (insg.)

Elektronische Version(en)

https://doi.org/10.1039/d3ra04530g (Zugang: Offen)