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3D Interlocking Metallo-COFs as a Visible Light Responsive Photocatalyst.

Anahita Khojastegi1, Ahmadreza Khosropour1, Florian Auras2

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Small (Weinheim an Der Bergstrasse, Germany)
|December 16, 2024
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Summary

Woven covalent organic frameworks (COFs) with integrated copper(I) photosensitizers show excellent stability and reusability for degrading sulfamethoxazole (SMX) under visible light, outperforming discrete copper complexes.

Keywords:
Cu(I) photosensitizersInterlocking COFPhotoactive materialsmetallo‐COF

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Area of Science:

  • Materials Science
  • Photochemistry
  • Supramolecular Chemistry

Background:

  • Covalent organic frameworks (COFs) are promising photoactive materials.
  • Integrating metal complexes into COFs enhances their properties.
  • Discrete metal complexes often suffer from instability and poor reusability.

Purpose of the Study:

  • To synthesize and characterize a woven COF with integrated copper(I) photosensitizers.
  • To investigate the optoelectronic and photocatalytic properties of the metallo-COF.
  • To compare the stability and reusability of the metallo-COF with discrete copper complexes.

Main Methods:

  • Synthesis of a woven covalent organic framework (COF).
  • Incorporation of copper(I) photosensitizers into the COF structure.
  • Characterization of the metallo-COF's structure and properties.
  • Photocatalytic degradation of sulfamethoxazole (SMX) under visible light.

Main Results:

  • Successfully synthesized and characterized a 3D woven COF with spatially isolated Cu(I) photosensitizers.
  • The metallo-COF exhibited efficient light absorption and photocatalytic activity for SMX degradation.
  • The metallo-COF demonstrated superior stability and reusability over multiple catalytic cycles compared to discrete Cu(PDB)2BF4 complexes.

Conclusions:

  • Woven COFs provide a stable and effective platform for integrating photosensitizers.
  • The metallo-COF offers significant advantages in stability and reusability over discrete molecular catalysts.
  • This work highlights the potential of COFs in developing robust and recyclable photocatalytic systems.