Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel.
Department of Materials, Royal School of Mines, Imperial College London, London SW72AZ, UK.
Molecules. 2021 Mar 16;26(6):1646. doi: 10.3390/molecules26061646.
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 N 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.
氮化碳材料的制备需要高温（>500°C），这需要大量的能源消耗。此外，高反应温度限制了材料的可加工性和对其元素组成的控制。因此，仍然非常需要替代在较温和条件下进行的合成途径。在这项工作中，我们通过在 N 气氛下对三聚氰胺和乙脒进行热缩合，在低温（300°C）下制备了半导体氮化碳（CN）聚合物。这些分子是异构体：它们具有相同的化学式，但元素的空间分布不同。X 射线光电子能谱（XPS）实验和电化学及光物理特性证实，初始空间组织强烈决定了材料的化学组成和电子结构，由于其表面保留了官能团，这些材料在液体介质中具有优异的可加工性。
