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利用扫描隧道显微镜研究了两个1,3,2-dioxaborine(DOB)类衍生物在高定向裂解石墨(HOPG)表面的自组装行为.研究的分子中均含有共轭π体系,分子末端由于苯环的排斥作用为立体结构.实验研究了对称性及取代基团数目对自组装结构的影响.结果表明,在甲苯溶剂中制备的这些自组装结构为长程有序结构,分子间的偶极作用以及空间位阻效应是影响自组装的主要因素.
The self-assembly behaviors of two derivatives of 1,3,2-dioxaborine (DOB) on the surface of highly oriented pyrolytic graphite (HOPG) were investigated by scanning tunneling microscopy. The studied molecules all contain conjugated π system, The exclusion of rings is a three-dimensional structure.The influence of symmetry and the number of substitution groups on the self-assembly structure is investigated experimentally.The results show that these self-assembled structures prepared in toluene solvent are long-range ordered structures with intermolecular dipole interactions As well as steric hindrance effect is the main factor affecting self-assembly.