Self-assembled structure of alkyloxy substituted benzoic acid methyl ester on HOPG: An STM study
Self-assembled structure of alkyloxy substituted benzoic acid methyl ester on HOPG: An STM study
复制标题
DOI：
10.1360/04wb0090
复制
发表时间：
2004-12
影响因子：
--
通讯作者：
Qun-Hui Yuan;Jun Lu;L. Wan;C. Bai
中科院分区：
文献类型：
--
作者：
Qun-Hui Yuan;Jun Lu;L. Wan;C. Bai
通过扫描隧道显微镜 (STM) 在 HOPG 上研究了 3,4,5-三十二烷氧基苯甲酸甲酯 (E12)、3,4,5-三十四烷氧基苯甲酸甲酯 (E14) 及其混合物 (E12/E14) 的自组装结构。在 E12 和 E14 单层中观察到由偶极-偶极相互作用诱导的二聚体样模式。这些分子形成紧密堆积的行并与相邻分子中的烷基链相互交叉。结构差异被认为是由于取代烷基链的长度不同造成的。由于相似的吸附能，在具有不同域的E12和E14混合吸附层中观察到相分离。
Self-assembled structures of 3,4,5-tris-dodecyloxy benzoic acid methyl ester (E12), 3,4,5-tris-tetradecyloxy-benzoic acid methyl ester (E14) and their mixture (E12/E14) have been studied on HOPG by scanning tunneling microscopy (STM). Dimer-like patterns induced by dipole-dipole interaction are observed in E12 and E14 monolayers. The molecules form close-packed rows and interdigitate with the alkyl chains in adjacent molecules. The structural differences are proposed to be from the different length of substituted alkyl chains. Owing to similar adsorption energy, phase separation is observed in the E12 and E14 mixed adlayer with different domains.