Self-assembled structure of alkyloxy substituted benzoic acid methyl ester on HOPG:An STM study  

作　　者：YUANQunhui LUJun WANLijun BAIChunli 

机构地区：[1]InstituteofChemistry,ChineseAcademyofSciences,Beijing100080,China

出　　处：《Chinese Science Bulletin》2004年第24期2590-2593,共4页

摘　　要：Self-assembled structures of 3,4,5-tris-dodecy- loxy benzoic acid methyl ester (E12), 3,4,5-tris-tetradecy- loxy-benzoic acid methyl ester (E14) and their mixture (E12/E14) have been studied on HOPG by scanning tunnel- ing microscopy (STM). Dimer-like patterns induced by di- pole-dipole interaction are observed in E12 and E14 monolayers. The molecules form close-packed rows and in- terdigitate 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 adsorp- tion energy, phase separation is observed in the E12 and E14 mixed adlayer with different domains.Self-assembled structures of 3,4,5-tris-dodecy- loxy benzoic acid methyl ester (E12), 3,4,5-tris-tetradecy- loxy-benzoic acid methyl ester (E14) and their mixture (E12/E14) have been studied on HOPG by scanning tunnel- ing microscopy (STM). Dimer-like patterns induced by di- pole-dipole interaction are observed in E12 and E14 monolayers. The molecules form close-packed rows and in- terdigitate 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 adsorp- tion energy, phase separation is observed in the E12 and E14 mixed adlayer with different domains.

关 键 词：自集聚结构 烷基 安息香酸甲基酯 HOPG 显微镜扫描技术 交互作用 有机物 分子结构 

分 类 号：O623.624[理学—有机化学]