Low-Temperature Synthesis of Solution Processable Carbon Nitride Polymers |
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Authors: | Junyi Li,Neeta Karjule,Jiani Qin,Ying Wang,Jesú s Barrio,Menny Shalom |
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Affiliation: | 1.Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel; (J.L.); (N.K.); (J.Q.); (Y.W.);2.Department of Materials, Royal School of Mines, Imperial College London, London SW72AZ, UK |
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Abstract: | Carbon nitride materials require high temperatures (>500 °C) for their preparation, which entails substantial energy consumption. Furthermore, the high reaction temperature limits the materials’ processability and the control over their elemental composition. Therefore, alternative synthetic pathways that operate under milder conditions are still very much sought after. In this work, we prepared semiconductive carbon nitride (CN) polymers at low temperatures (300 °C) by carrying out the thermal condensation of triaminopyrimidine and acetoguanamine under a N2 atmosphere. These molecules are isomers: they display the same chemical formula but a different spatial distribution of their elements. X-ray photoelectron spectroscopy (XPS) experiments and electrochemical and photophysical characterization confirm that the initial spatial organization strongly determines the chemical composition and electronic structure of the materials, which, thanks to the preservation of functional groups in their surface, display excellent processability in liquid media. |
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Keywords: | polymeric carbon nitride low-temperature synthesis solution-processable polymers |
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