The crystalline sodium salt of p-phenylenebis(silanetriolate), (NaO)3SiC6H4Si(ONa)3·14H2O has been prepared in quantitative yield by reaction of the corresponding alkoxysilane with NaOH. Characterization of its structure indicates two different environments for the silicon atoms (X-ray and 13C, 29Si, 1H NMR) in the solid state. Drying of the salt by thermal treatment between 20 and 180 °C (TG analysis) led to a modification of the structure without loss of the organic group. Elimination of C6H6 occurs above 200 °C and formation of the sodium silicate Na2SiO3 can be identified above 400 °C (X-ray diffraction). Quantitative replacement of the sodium cation with Al3+, Zn2+, Ca2+ and Eu3+ has been achieved resulting in the formation of the corresponding silanetriolates (EDX and elemental analyses). X-Ray diffraction analysis suggests the presence of a lamellar structure on very small domains or a short range order.
通过相应的烷氧基
硅烷与 NaOH 反应,制备出对苯二甲
硅烷三醇钠盐 (NaO)3SiC6H4Si(ONa)3-14H2O,并获得了定量收率。其结构表征表明
硅原子在固态下有两种不同的环境(X 射线和 13C、29Si、1H NMR)。通过 20 至 180 °C 的热处理(TG 分析)将盐干燥后,结构发生了改变,但有机基团没有损失。
C6H6 在 200 °C 以上发生消除,
硅酸钠 Na2SiO3 在 400 °C 以上形成(X 射线衍射)。用 Al3+、Zn2+、Ca2+ 和 Eu3+ 对
钠阳离子进行定量置换后,形成了相应的
硅烷三醇(EDX 和元素分析)。X 射线衍射分析表明,在极小的畴或短程阶上存在片状结构。