Polyphosphonate covalent organic frameworks

Ke Xu, Robert Oestreich, Takin Haj Hassani Sohi, Mailis Lounasvuori, Jean G. A. Ruthes, Yunus Zorlu, Julia Michalski, Philipp Seiffert, Till Strothmann, Patrik Tholen, A. Ozgur Yazaydin, Markus Suta, Volker Presser, Tristan Petit, Christoph Janiak, Jens Beckmann, Jörn Schmedt auf der Günne () and Gündoğ Yücesan ()
Additional contact information
Ke Xu: Adolf-Reichwein-Straße 2
Robert Oestreich: Universitätsstraße 1
Takin Haj Hassani Sohi: Universitätsstraße 1
Mailis Lounasvuori: Albert-Einstein-Straße 15
Jean G. A. Ruthes: Campus D22
Yunus Zorlu: Gebze Technical University
Julia Michalski: Universitätsstraße 1
Philipp Seiffert: Universitätsstraße 1
Till Strothmann: Universitätsstraße 1
Patrik Tholen: Gustav-Meyer-Allee 25
A. Ozgur Yazaydin: University College London
Markus Suta: Universitätsstraße 1
Volker Presser: Campus D22
Tristan Petit: Albert-Einstein-Straße 15
Christoph Janiak: Universitätsstraße 1
Jens Beckmann: Universität Bremen
Jörn Schmedt auf der Günne: Adolf-Reichwein-Straße 2
Gündoğ Yücesan: Universitätsstraße 1

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Herein, we report polyphosphonate covalent organic frameworks (COFs) constructed via P-O-P linkages. The materials are synthesized via a single-step condensation reaction of the charge-assisted hydrogen-bonded organic framework, which is constructed from phenylphosphonic acid and 5,10,15,20‐tetrakis[p‐phenylphosphonic acid]porphyrin and is formed by simply heating its hydrogen-bonded precursor without using chemical reagents. Above 210 °C, it becomes an amorphous microporous polymeric structure due to the oligomerization of P-O-P bonds, which could be shown by constant-time solid-state double-quantum 31P nuclear magnetic resonance experiments. The polyphosphonate COF exhibits good water and water vapor stability during the gas sorption measurements, and electrochemical stability in 0.5 M Na2SO4 electrolyte in water. The reported family of COFs fills a significant gap in the literature by providing stable microporous COFs suitable for use in water and electrolytes. Additionally, we provide a sustainable synthesis route for the COF synthesis. The narrow pores of the COF effectively capture CO2.

Date: 2024
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DOI: 10.1038/s41467-024-51950-1

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