碳二亚胺
烷基
化学
吸附
红外光谱学
水溶液
硅
产量(工程)
共价键
高分子化学
化学工程
有机化学
材料科学
工程类
冶金
作者
S. Sam,Larbi Touahir,Juliana Salvador Andresa,P. Allongue,J.‐N. Chazalviel,Anne Chantal Gouget-Laemmel,Catherine Henry de Villeneuve,A. Moraillon,F. Ozanam,N. Gabouze,Safia Djebbar
出处
期刊:Langmuir
[American Chemical Society]
日期:2009-09-02
卷期号:26 (2): 809-814
被引量:311
摘要
Infrared spectroscopy is used to investigate the transformation of carboxyl-terminated alkyl chains immobilized on a surface into succinimidyl ester-terminated chains by reaction with an aqueous solution of N-ethyl-N′-(3-(dimethylamino)propyl)carbodiimide (EDC) and N-hydroxysuccinimide (NHS). The acid chains are covalently grafted at the surface of hydrogenated porous silicon whose large specific surface area allows for assessing the activation yield in a semiquantitative way by infrared (IR) spectroscopy and detecting trace amounts of surface products and/or reaction products of small IR cross section. In this way, we rationalize the different reaction paths and optimize the reaction conditions to obtain as pure as possible succinimidyl ester-terminated surfaces. A diagram mapping the surface composition after activation was constructed by systematically varying the solution composition. Results are accounted for by NHS surface adsorption and a kinetic competition between the various EDC-induced surface reactions.
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