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首页> 外文期刊>Applied Surface Science >Fluorinated saccharides on the Si(001) surface
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Fluorinated saccharides on the Si(001) surface

机译：Si（001）表面上的氟化糖

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摘要

The attachment of saccharide molecules directly to silicon surface has been for the first time. Oxygen free silicon surface was functionalized with monosacharides thanks to UV irradiation in acetonitryl solution (254 nm). Selected derivatives of pentofuranose were protected at the C-1 and C-2 position. The remaining hydroxyl group at C-3 or C-5 was suitable for direct attachment to H-terminated Si(0 01) surface via Si—O—C bonds. The binding energy of the saccharide to the Si surface was investigated by quantum mechanical calculations method. The Parametric Method 5 (PM5) calculations confirmed that the formation of Si—O—C bonds was chemically possible. Synthesis of new fluorinated carbohydrates has been described. The resulting monolayers were characterized by Atomic Force Microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and Attenuated Total Reflection (ATR) infrared spectroscopy. The effect of incorporating fluorine atom or CF3 group into self-assembled monosaccharide monolayers was studied using a water contact angle measurements. The resulting surface wettability of different fluorinated components on one kind of planar substrate enables an answer which of derivative is required for the preparation of the hydrophobic monolayer.
机译：糖分子直接与硅表面的连接是第一次。由于在乙腈溶液（254 nm）中进行了紫外线照射，无氧硅表面被单糖官能化。选定的戊呋喃糖衍生物在C-1和C-2位置受到保护。 C-3或C-5处的剩余羟基适合于通过Si-OC键直接连接至H末端的Si（0.01）表面。通过量子力学计算方法研究了糖与硅表面的结合能。参数方法5（PM5）的计算证实，化学上可能形成Si-OC键。已经描述了新的氟化碳水化合物的合成。通过原子力显微镜（AFM），X射线光电子能谱（XPS）和衰减全反射（ATR）红外光谱来表征所得的单层。使用水接触角测量研究了将氟原子或CF3基团掺入自组装单糖单层中的效果。在一种平面基板上不同氟化成分的最终表面润湿性使得能够回答制备疏水单层所需的衍生物。

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