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利用扫描隧道显微镜研究了3, 4, 5-三取代十二烷氧基苯甲酸甲酯(E12)和3, 4, 5-三取代十四烷氧基苯甲酸甲酯(E14)两种分子的自组装结构、组装层分子间相互作用以及两种分子共吸附在石墨表面时的组装结构. 两种分子均在石墨表面有序吸附, 分子在偶极-偶极相互作用下, 烷基链对插排列形成类二聚体的二维有序长程结构. 取代基数目的差异导致两种分子吸附结构不同. 两种分子混合在石墨表面吸附时, 各自形成不同的畴区, 呈相分离状态.
The scanning electron microscope (SEM) was used to study the effects of 3,4,5-trisubstituted dodecoxybenzoic acid methyl ester (E12) and 3,4,5-trisubstituted tetradecyloxybenzoic acid methyl ester (E14) Of the self-assembly structure, the interaction between the assembly layer molecules and the two molecules co-adsorbed on the surface of the graphite assembly structure of the two molecules are ordered adsorption on the graphite surface, molecules in the dipole-dipole interaction, the alkyl chain The two-dimensional ordered long-range structure that forms a dimer by intercalation is formed, and the difference in the number of substituents leads to different adsorption structures of the two molecules. When the two molecules are mixed and adsorbed on the graphite surface, they form different domains and form a phase separation state.