Diphenylphosphino functionalization of mesoporous silica using tripodal linker units
作者:Takayuki Miyaji、Shun-ya Onozawa、Norihisa Fukaya、Masae Ueda、Yukio Takagi、Toshiyasu Sakakura、Hiroyuki Yasuda
DOI:10.1016/j.jorganchem.2010.12.030
日期:2011.4
The immobilization of diphenyl phosphine onto ordered mesoporous silicas using a tripodal linker unit possessing one bromopropyl group and three anchoring silicon atoms was investigated. Solid-state 31P, 29Si, and 13C cross-polarization/magic angle spinning (CP/MAS) NMR spectroscopic studies as well as isothermal nitrogen adsorption/desorption measurements revealed that grafting the tripodal linker
研究了使用具有一个溴丙基和三个锚定硅原子的三脚架连接单元将二苯基膦固定在有序介孔二氧化硅上。固态31 P,29 Si和13 C交叉极化/魔角旋转(CP / MAS)NMR光谱研究以及等温氮吸附/解吸测量表明,嫁接三脚架连接单元以及随后与二苯基磷化钾的反应(“自下而上”的方法)成功实现了二氧化硅的二苯基膦基官能化,同时保持了介孔结构。相反,将由三脚架连接单元预合成的三脚架二苯基膦配体直接接枝到硅胶上(“自上而下”的方法)是不成功的。