@Article{B412517G,
author ="Horvath-Bordon, Elisabeta and Kroke, Edwin and Svoboda, Ingrid and Fueß, Hartmut and Riedel, Ralf and Neeraj, Sharma and Cheetham, Anthony K.",
title  ="Alkalicyamelurates{,} M3[C6N7O3]·xH2O{,} M = Li{,} Na{,} K{,} Rb{,} Cs: UV-luminescent and thermally very stable ionic tri-s-triazine derivatives",
journal  ="Dalton Trans.",
year  ="2004",
issue  ="22",
pages  ="3900-3908",
publisher  ="The Royal Society of Chemistry",
doi  ="10.1039/B412517G",
url  ="http://dx.doi.org/10.1039/B412517G",
abstract  ="Cyamelurates are salts of cyameluric acid{,} a derivative of tri-s-triazine (1{,}3{,}4{,}6{,}7{,}9-hexaazacyclo[3.3.3]azine or s-heptazine). These compounds are thermally very stable and possess interesting structural and optical properties. Only very few tri-s-triazine derivatives have been reported in the literature. The water-soluble alkali cyamelurates were extensively characterized using NMR{,} FTIR{,} Raman{,} UV{,} luminescence spectroscopy and elemental analysis. In addition{,} the single crystal X-ray structure analyses of the four hydrates of lithium{,} sodium{,} potassium and rubidium cyamelurates (Li3[C6N7O3]·6H2O; Na3[C6N7O3]·4.5H2O; K3[C6N7O3]·3H2O; Rb3[C6N7O3]·3H2O) are presented. Thermogravimetric analysis shows that the dehydrated salts start to decompose at temperatures above 500 °C. The thermal stability does not depend on the cations which is in contrast to the analogous s-triazine salts{,} i.e. the alkali cyanurates M3[C3N3O3]. The photoluminescence spectra indicate a very strong solid state UV-emission with maxima between 280 and 400 nm."}