Cage dodecaphenylsilsesquioxane (T12-Phenyl) was synthesized in a one batch, mildly basic aqueous solution under room temperature conditions using a trialkoxysilane precursor. Significant improvements in synthetic yield (>95%) were observed compared with previous reports. Kinetic studies of the hydrolysis of phenyltrimethoxysilane were conducted and the condensation was monitored by 29Si NMR which revealed the presence of a transient, intermediary T1 species as the pathway to dodecaphenylsilsesquioxane spherulites, and the tendency for T12 structures over T8, T10, and other substructures was explained through MM2 simulations.
在室温条件下,使用三烷氧基
硅烷前体,在温和的碱性
水溶液中一次性合成了
十二烷基苯基
硅倍半氧烷(T12-苯基)。与之前的报告相比,合成收率显著提高(大于 95%)。研究人员对苯基
三甲氧基硅烷的
水解过程进行了动力学研究,并通过 29Si NMR 对缩合过程进行了监测,结果表明,在
十二烷基苯基
硅烷基
喹喔啉球形结构的形成过程中,存在一种瞬时的中间 T1 物种,通过 MM2 模拟解释了 T12 结构优于 T8、T10 和其他亚结构的趋势。