Herein, we report the covalent immobilisation, through Si–C bonds, of various [60]fullerene derivatives on flat silicon surfaces following three different preparative protocols. Each synthetic strategy comprises a two-step approach that includes a pre-modification step of the Si(100) surface with an organic monolayer bearing a terminal functionality that undergoes a bond-forming reaction with a [60]fullerene synthon as characterized by X-ray photoelectron spectroscopy (XPS) measurements. Water contact angle measurements clearly showed a characteristic change of the surface hydrophobicity upon covalent immobilisation of the carbon functions. The hybrid [4b-Si(100)] surfaces, containing [60]fullerene-ferrocene fragments, were also investigated by means of cyclic voltammetry (CV), and were revealed to be exceptionally robust towards repeated reduction–oxidation cycles. Moreover, several surface-confined redox couples were observed in CH3CN solution. The surface coverage was measured to be ca. 2.5 × 10−11 mol cm−2.
在此,我们报告了采用三种不同的制备方案,通过 Si-C 键将各种 [60]
富勒烯衍
生物共价固定在平面
硅表面的情况。每种合成策略都包括两个步骤,其中一个步骤是用带有末端官能团的有机单层对
硅(100)表面进行预改性,该有机单层会与[60]
富勒烯合体发生成键反应,X 射线光电子能谱(XPS)测量对该反应进行了表征。
水接触角测量结果清楚地表明,碳功能共价固定后,表面疏
水性发生了特征性变化。含有 [60]
富勒烯-
二茂铁片段的[4b-Si(100)]混合表面还通过循环伏安法(CV)进行了研究,结果表明这种混合表面在反复的还原-氧化循环中异常坚固。此外,在 CH3CN 溶液中还观察到几种表面封闭氧化还原偶。经测量,表面覆盖率约为2.5 × 10-11 mol cm-2。