Paramagnetic Carbon Nanosheets with Random Hole Defects and Oxygenated 
Functional Groups

Jung, S.‐M.; Park, J.; Shin, D.; Jeong, H. Y.; Lee, D.; Jeon, I.‐Y.; Cho, H.; Park, N.; Yoo, J.‐W.; Baek, J.‐B.

doi:10.1002/anie.201903226

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Paramagnetic Carbon Nanosheets with Random Hole Defects and Oxygenated Functional Groups

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Park, N.
Department of Physics, Ulsan National Institute of Science and Technology (UNIST);
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free Electron Laser Science;

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https://dx.doi.org/10.1002/anie.201903226
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Citation

Jung, S., Park, J., Shin, D., Jeong, H. Y., Lee, D., Jeon, I., et al. (2019). Paramagnetic Carbon Nanosheets with Random Hole Defects and Oxygenated Functional Groups. Angewandte Chemie International Edition, 58(34), 11670-11675. doi:10.1002/anie.201903226.

Cite as: https://hdl.handle.net/21.11116/0000-0004-700F-E

Abstract

Ordered graphitic carbon nanosheets (GCNs) were, for the first time, synthesized by the direct condensation of multifunctional phenylacetyl building blocks (monomers) in the presence of phosphorous pentoxide. The GCNs had highly ordered structures with random hole defects and oxygenated functional groups, showing paramagnetism. The results of combined structural and magnetic analyses indicate that the hole defects and functional groups are associated with the appearance and stabilization of unpaired spins. DFT calculations further suggest that the emergence of stabilized spin moments near the edge groups necessitates the presence of functionalized carbon atoms around the hole defects. That is, both hole defects and oxygenated functional groups are essential ingredients for the generation and stabilization of spins in GCNs.