Affiliation:
1. Department of Food Science College of Agriculture and Life Sciences Cornell University Ithaca NY 14853 USA
2. Institute for Solid State Theory Center for Multiscale Theory and Computation Center for Nanotechnology University of Münster 48149 Münster Germany
Abstract
AbstractWoven covalent organic frameworks (COF) possess entangled 3D frameworks. The metallated version of these structures contains spatially isolated Cu(I) centers and promising optoelectronic properties because of metal‐to‐ligand charge transfer (MLCT). However, despite their potential, woven COFs have not yet been investigated as photocatalysts. In this study, a new woven COF, Cu‐PhenBDA‐COF, functionalized with diacetylene bonds is developed. Cu‐PhenBDA‐COF is fully characterized, and the optoelectronic and photocatalytic properties are compared to previously reported Cu‐COF‐505. The diacetylene bonds of the linker positively impact the optoelectronic properties of Cu‐PhenBDA‐COF and result in a narrower bandgap and better charge separation efficiency. When the Cu(I) center is removed from both woven COFs, the absorption edge is blueshifted, resulting in a wider bandgap, and there is a considerable decrease in the charge separation efficiency, underscoring the pivotal role of MLCT. This trend is reflected in the photocatalytic activity of the woven COFs toward the degradation of sulfamethoxazole in water, where the highest reaction rate constant (kapp) is recorded for the metallated diacetylene functionalized woven COF, Cu‐PhenBDA‐COF.
Funder
Empire State Development
Directorate for Mathematical and Physical Sciences
Division of Chemistry
National Institute of General Medical Sciences
Division of Materials Research
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials
Cited by
3 articles.
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