Amino-terminated organic monolayers on hydrogen-terminated silicon surfaces
Amino-terminated organic monolayers on hydrogen-terminated silicon surfaces
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DOI：
10.1021/la010484s
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发表时间：
2001-11-27
期刊：
影响因子：
3.9
通讯作者：
Sudhölter, EJR
中科院分区：
文献类型：
--
作者：
Sieval, AB;Linke, R;Sudhölter, EJR
发展了一种在氢封端硅表面制备氨基封端单分子膜的新方法。这两步程序是第一种直接控制氨基表面密度的方法。首先，使用邻苯二甲酰亚胺或乙酰胺作为NH 2-保护基团，在H-封端的Si表面上制备受保护的ω-氨基-1-烯烃和非官能的1-烯烃的混合单层。随后的保护基团的去除产生的共价连接的NH 2-terininated单层，证明从水接触角测量，红外光谱，和X-射线光电子能谱。两种保护基都有其自身的优点：邻苯二甲酰亚胺部分的使用在合成上非常方便;相对小的乙酰胺部分可以用于制备具有高密度（> 50%）的胺基的单层。的胺基的反应性已被证实通过进一步修改的单分子膜。
A new approach has been developed to prepare amino-terminated monolayers on hydrogen-terminated silicon surfaces. This two-step procedure is the first method that provides direct control over the surface density of the amino groups. First, a mixed monolayer of a protected omega -amino-1-alkene and a nonfunctional 1-alkene is prepared on a H-terminated Si surface, using either phthalimide or acetamide as NH2-protecting groups. Subsequent removal of the protective groups generates the covalently attached NH2-terininated monolayer, as evidenced from water contact angle measurements, IR spectroscopy, and X-ray photoelectron spectroscopy. Both protecting groups have their own advantages: use of the phthalimide moiety is synthetically very convenient; the relatively small acetamide moiety can be used to prepare monolayers with high densities (> 50%) of amine groups. The reactivity of the amine groups has been confirmed by further modification of the monolayers.