Kinetic control of the photochemical reactivity of hydrogen-terminated silicon with bifunctional molecules

被引:48
作者
Asanuma, H
Lopinski, GP
Yu, HZ [1 ]
机构
[1] Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada
[2] Natl Res Council Canada, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, Canada
关键词
D O I
10.1021/la0474969
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Carboxy-terminated crystalline silicon surfaces are of fundamental importance for biochip fabrication because of their reactivity toward biological macromolecules. To explore the feasibility of direct attachment of bifunctional molecules (e.g., omega-alkenoic acids) to hydrogen-terminated silicon crystal (H-Si) via Si-C linkages, we have investigated the photoreactivities of the alkene (-CH=CH2) and carboxy (-COOH) terminal groups of 1-dodecene, undecanoic acid, and undecylenic acid toward H-Si. The alkene terminus was found to react substantially faster than the carboxy terminus under UV irradiation (at 350 nm). By controlling the reaction time, high-quality carboxy-terminated monolayers, comparable to those formed by ester hydrolysis, can be obtained from a direct, one-step photochemical reaction between H-Si and undecylenic acid.
引用
收藏
页码:5013 / 5018
页数:6
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