申请人:Hewlett-Packard Company
公开号:US05869724A1
公开(公告)日:1999-02-09
The present invention provides asymmetric bidentate silane reagents from modifying the surface of liquid chromatography supports, the supports and methods of making and using the same. When bonded to the surface of a support material, the resulting modified support material provides improved properties, such as better separations and more stable support materials, especially when used in liquid chromatography. These bidentate silanes have the general structure: R.sub.1 SiMe(NMe.sub.2)--(CH.sub.2).sub.n --SiMeR.sub.2 (NMe.sub.2). R.sub.1 is an alkyl group having from 1 to 30 carbon atoms, and R.sub.2 is an alkyl group having from 8 to 18 carbon atoms. R.sub.1 is a different alkyl group than R.sub.2. Me is a methyl group, and n has a value 2 or 3. In certain embodiments, R.sub.2 includes at least one functional group. When reacted with a silica surface, the resulting modified surface has a structure: PSiO--\x9bR.sub.1 SiMe--(CH.sub.2).sub.n --SiMeR!--OSiP. PSiO is a surface reacted silica.
本发明提供了一种不对称双齿硅烷试剂,通过修饰液相色谱支撑体的表面来制备这些支撑体,并提供了制备和使用这些支撑体的方法。当与支撑材料的表面键合时,所得到的改性支撑材料具有更好的性能,例如更好的分离和更稳定的支撑材料,特别是在液相色谱中使用时。这些双齿硅烷具有一般结构:R.sub.1 SiMe(NMe.sub.2)--(CH.sub.2).sub.n--SiMeR.sub.2(NMe.sub.2)。其中,R.sub.1是具有1到30个碳原子的烷基,R.sub.2是具有8到18个碳原子的烷基,R.sub.1与R.sub.2是不同的烷基。Me是甲基基团,n的值为2或3。在某些实施例中,R.sub.2包括至少一个功能基团。当与硅胶表面反应时,所得到的改性表面具有结构:PSiO--\x9bR.sub.1 SiMe--(CH.sub.2).sub.n--SiMeR!--OSiP。其中,PSiO是表面反应的硅胶。