Synthesis and characterization of 5,5′-bis-silylated dithienylethene as a new building block of novel photochromic periodic mesoporous organosilicas
作者:Mohamed Abboud
DOI:10.1007/s11164-020-04086-y
日期:2020.4
iodine–lithium exchange. The synthesis and purification method were optimized after many attempts of different coupling methods and purification techniques to ovoid the hydrolysis and self-condensation reaction and to obtain a pure product. The obtained bis-silylated dithienylethene (BS-DTE) is a versatile building block for potential applications, such as synthesis of new photochromic periodic mesoporous organosilica
纯双甲硅烷基化二噻吩基乙烯(DTE)3-(3,3,4,4,5,5-六氟-2-(2-甲基-5-(三乙氧基甲硅烷基)噻吩-3-基)环戊-1-烯基)-由3-(3,3,4,4,5,5-六氟-2-(5-碘-2-甲基噻吩-3-基)环戊-1-烯基制备2-甲基-5-(三乙氧基甲硅烷基)噻吩碘-锂交换生成)-5-碘-2-甲基噻吩。经过多次尝试不同的偶联方法和纯化技术,对合成和纯化方法进行了优化,以避免水解和自缩合反应,从而获得纯净的产物。所获得的双甲硅烷基化二噻吩基乙烯(BS-DTE)是潜在应用的通用构建基,例如合成新的光致变色周期性介孔有机二氧化硅(PPMO)。获得的前体的结构通过1 H,13 C和29 Si液相NMR。已经进行了许多尝试来制备DTE-PMO,但是最终材料中的C-Si键是脆弱的,不能抵抗合成过程中的水热处理。DTE-PMO的热稳定性将在以后的工作中进行研究。