Burmeister, D.; Müller, J.; Plaickner, J.; Kochovski, Z.; List-Kratochvil, E. J. W.; Bojdys,* M. J. Chem. Eur. J. 2022. DOI: 10.1002/chem.202200705; Zenodo 2022. DOI: 10.5281/zenodo.6244965
Ionothermal condensation of dicyandiamide in alkali halide salt melts leads to the formation of extended 2D, layered frameworks only in the presence of small halides such as chloride, and bromide. With increasing size of the alkali halide intercalate, stabilizing van der Waals interactions between extended, π-conjugated triazine-based sheets are lost. We identify the main, crystalline product from an alkali iodide eutectic as melem hydrate, a heptazine (C6N7)-based, hydrogen-bonded, monoclinic solid.