Brozek Eric M, Zharov Ilya
Department of Chemistry, University of Utah, Salt Lake City, Utah 84112.
Chem Mater. 2009;21(8):1451-1456. doi: 10.1021/cm801894w.
The interior of 237 nm spherical vinylsilsesquioxane nanoparticles has been covalently modified and their surface functionalized under mild conditions to yield a novel type of hybrid silsesquioxane nanoparticles. Data obtained from thermogravimetric and elemental analysis show that the vinyl groups inside the nanoparticles can be easily brominated or hydroborated, leading to the nanoparticles containing 59.9 wt% of bromine or 3.6 wt% of boron, respectively. Our results demonstrate that the vinyl groups inside the nanoparticles are highly accessible, which may lead to the preparation of a host of hybrid organosilica nanoparticles with complex structures. We also show that the surface of the brominated and boronated nanoparticles is unhindered for further amination.
237纳米的球形乙烯基倍半硅氧烷纳米颗粒的内部已在温和条件下进行了共价修饰，其表面也进行了功能化处理，从而得到了一种新型的杂化倍半硅氧烷纳米颗粒。热重分析和元素分析获得的数据表明，纳米颗粒内部的乙烯基可以很容易地被溴化或硼氢化，分别得到含59.9 wt%溴或3.6 wt%硼的纳米颗粒。我们的结果表明，纳米颗粒内部的乙烯基极易接近，这可能有助于制备一系列具有复杂结构的杂化有机硅纳米颗粒。我们还表明，溴化和硼化纳米颗粒的表面不受阻碍，可进一步进行胺化反应。
