Amino-Terminated Organic Monolayers on Hydrogen-Terminated Silicon Surfaces
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- 作者：Alexander B. Sieval ; Ralf Linke ; Gert Heij ; Geert Meijer ; Han Zuilhof ; and Ernst J. R. Sudhö ; lter
- 刊名：Langmuir
- 出版年：2001
- 出版时间：November 27, 2001
- 年：2001
- 卷：17
- 期：24
- 页码：7554 - 7559
- 全文大小：81K
- 年卷期：v.17,no.24(November 27, 2001)
- ISSN：1520-5827
文摘
A new approach has been developed to prepare amino-terminated monolayers on hydrogen-terminatedsilicon surfaces. This two-step procedure is the first method that provides direct control over the surfacedensity of the amino groups. First, a mixed monolayer of a protected 
-amino-1-alkene and a nonfunctional1-alkene is prepared on a H-terminated Si surface, using either phthalimide or acetamide as NH2-protectinggroups. Subsequent removal of the protective groups generates the covalently attached NH2-terminatedmonolayer, as evidenced from water contact angle measurements, IR spectroscopy, and X-ray photoelectronspectroscopy. Both protecting groups have their own advantages: use of the phthalimide moiety issynthetically very convenient; the relatively small acetamide moiety can be used to prepare monolayerswith high densities (>50%) of amine groups. The reactivity of the amine groups has been confirmed byfurther modification of the monolayers.
-amino-1-alkene and a nonfunctional1-alkene is prepared on a H-terminated Si surface, using either phthalimide or acetamide as NH2-protectinggroups. Subsequent removal of the protective groups generates the covalently attached NH2-terminatedmonolayer, as evidenced from water contact angle measurements, IR spectroscopy, and X-ray photoelectronspectroscopy. Both protecting groups have their own advantages: use of the phthalimide moiety issynthetically very convenient; the relatively small acetamide moiety can be used to prepare monolayerswith high densities (>50%) of amine groups. The reactivity of the amine groups has been confirmed byfurther modification of the monolayers.