Preparation of Bifunctional Mesoporous Silica Nanoparticles by Orthogonal Click Reactions and Their Application in Cooperative Catalysis
作者:Arne T. Dickschat、Frederik Behrends、Martin Bühner、Jinjun Ren、Mark Weiß、Hellmut Eckert、Armido Studer
DOI:10.1002/chem.201200499
日期:2012.12.21
The synthesis of bifunctional mesoporous silica nanoparticles is described. Two chemically orthogonal functionalities are incorporated into mesoporous silica by co‐condensation of tetraethoxysilane with two orthogonally functionalized triethoxyalkylsilanes. Post‐functionalization is achieved by orthogonal surface chemistry. A thiol–ene reaction, Cu‐catalyzed 1,3‐dipolar alkyne/azide cycloaddition,
描述了双功能介孔二氧化硅纳米粒子的合成。通过将四乙氧基硅烷与两个正交官能化的三乙氧基烷基硅烷共缩合,可在介孔二氧化硅中引入两个化学正交的官能度。后功能化是通过正交表面化学实现的。硫醇-烯反应,Cu催化的1,3-偶极炔烃/叠氮化物环加成反应和自由基一氧化氮交换反应被用作正交过程,以在表面上安装两种反应性不同的官能团。讨论了通过这种方法制备带有酸性和碱性位点的介孔二氧化硅纳米粒子。颗粒通过固态NMR光谱,元素分析,红外光谱和扫描电子显微镜进行分析。作为第一个应用程序,