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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Alkalicyamelurates, M-3[C6N7O3]center dot xH(2)O, M = Li, Na, K, Rb, Cs: UV-luminescent and thermally very stable ionic tri-s-triazine derivatives
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Alkalicyamelurates, M-3[C6N7O3]center dot xH(2)O, M = Li, Na, K, Rb, Cs: UV-luminescent and thermally very stable ionic tri-s-triazine derivatives

机译：烷基三甲酸酯，M-3 [C6N7O3]中心点xH（2）O，M = Li，Na，K，Rb，Cs：UV发光和热稳定的离子型三-s-三嗪衍生物

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摘要

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 (Li-3[C6N7O3] . 6H(2)O; Na-3[C6N7O3] . 4.5H(2)O; K-3[C6N7O3] . 3H(2)O; Rb-3[C6N7O3] . 3H(2)O) are presented. Thermogravimetric analysis shows that the dehydrated salts start to decompose at temperatures above 500degreesC. The thermal stability does not depend on the cations which is in contrast to the analogous s-triazine salts, i.e. the alkali cyanurates M-3[C3N3O3]. The photoluminescence spectra indicate a very strong solid state UV-emission with maxima between 280 and 400 nm.
机译：cyamelurate是cyameluric acid的盐，它是三-s-三嗪（1,3,4,6,7,9-六氮杂环[3.3.3]嗪或s-庚嗪的衍生物）。这些化合物在热方面非常稳定，并具有令人感兴趣的结构和光学性质。文献中仅报道了很少的三-s-三嗪衍生物。使用NMR，FTIR，拉曼光谱，UV，发光光谱和元素分析对水溶性碱金属氰尿酸酯进行了广泛表征。此外，对cyamelurates的锂，钠，钾和and四个水合物（Li-3 [C6N7O3]。6H（2）O; Na-3 [C6N7O3]。4.5H（2）的单晶X射线结构分析O; K-3 [C6N7O3] .3H（2）O; Rb-3 [C6N7O3]。3H（2）O）被提出。热重分析表明，脱水盐在高于500摄氏度的温度下开始分解。与类似的s-三嗪盐相反，即氰基氰尿酸酯M-3 [C3N3O3]，热稳定性不取决于阳离子。光致发光光谱表明非常强的固态紫外线发射，最大值在280至400 nm之间。

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