用扫描隧道显微镜观察偶氮苯衍生物在液体 石墨界面的组装(英文)

Molecular organization of a fluorine-containing azobenzene derivative at liquid/graphite interface observed by STM

本文主要报道了化合物 4 羟基 3′ 三氟甲基偶氮苯 (FAzoH)的合成及利用扫描隧道显微镜 (STM)对该化合物在十一醇溶剂 石墨界面的物理吸附的单分子膜进行了研究。从得到的扫描隧道显微像观察到了分子级别分辨率的单分子膜中的分子排列。主要原因是由于溶质分子中含有三氟甲基集团 ,而氟又具有强极性 ,它能与含羟基的另一相邻的溶质分子形成稳定的氢键以利于用扫描隧道显微镜得到图像 。

An azobenzene derivative [4 Hydroxy 3' Trifluoromethyl Azobenzene] (FAzoH) is synthesized and its physisorbed monolayers at liquid/solid interface are investigated by scanning tunneling microscopy (STM). The acquired STM images exhibit the molecular packing of the monolayers with submolecular resolution. The introduction of a trifluroromethyl group has a profound influence on the monolayer structure because of its capability of hydrogen bond formation with hydroxy group of neighbour molecule.