Surface inorganic chemistry: The reaction of hydroxyl-terminated thiols on gold with a zirconium coordination compound
Surface inorganic chemistry: The reaction of hydroxyl-terminated thiols on gold with a zirconium coordination compound
复制标题
DOI：
10.1021/la010854c
复制
发表时间：
2002
期刊：
影响因子：
3.9
通讯作者：
C. Dicke;M. Morstein;G. Hähner
中科院分区：
文献类型：
--
作者：
C. Dicke;M. Morstein;G. Hähner
我们通过锆配位化合物与羟基封端的烷醇单分子层的反应产生了一个定义明确的无机/有机双层系统。通过湿化学制备杂化系统，将硫醇覆盖的金基底浸入试剂双（乙酰丙酮）双（1，1，1，3，3，3-六氟2-丙醇）合锆Zr（acac）2（hfip）2在异辛烷中的稀溶液中。通过接触角测量、X射线光电子能谱和质谱对层状结构进行了表征。发现无机化合物在支撑有机膜的顶部上建立单层，其堆积密度比下面的硫醇膜低大约1个数量级。反应的速率常数被发现是显着低于硫醇吸附在金。膜在正己烷和异辛烷中稳定，而锆试剂与表面固定化醇的反应在正己烷和异辛烷中是完全可逆的。
We produced a well-defined inorganic/organic double layer system by the reaction of a zirconium coordination compound with a hydroxyl-terminated alkanethiol monolayer. The hybrid system was prepared by wet chemistry, immersing a thiol-covered gold substrate in a dilute solution of the reagent bis(acetylacetonato)bis(1,1,1,3,3,3-hexafluoro2-propanolato)zirconium, Zr(acac)2(hfip)2, in isooctane. Characterization of the layered structure was carried out by means of contact-angle measurements, X-ray photoelectron spectroscopy, and mass spectroscopy. The inorganic compound was found to establish a monolayer on top of the supporting organic film, with a packing density of approximately 1 order of magnitude lower than the underlying thiol film. The rate constant of the reaction was found to be significantly lower than that of thiol adsorption on gold. While the films were stable under hexane and isooctane, the reaction of the zirconium reagent with the surface-immobilized alcohol was completely reversible when i...