Abstract

Metal-organic structures are controllably prepared by tuning molecular size, supported substrates, and different kinds of metals. They are characterized by ultra-high vacuum low-temperature scanning tunnelling microscopy and Density functional theory calculations. The relatively larger size of all-trans-retinoic acid (ReA) compared to (2E,4E)-3-methyl-5-(2,6,6-trimethylcyclohex-1-enyl)penta-2,4-dienoic acid (DiA) leads to a bigger gap between neighboring ReA in a tetramer and allows for insertion of molecules, forming high density patterns. ReA forms various structures with different ratios (4:0, 3:1, 2:2) of the two chiral enantiomers on the less reactive Au(111) other than Ag(111). Unlike transition metals, electrostatic attraction between molecules and alkali metals is the origin of the formation of large quartet islands.

中文翻译：

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通过调整分子大小，负载的底物和金属类型来控制金属有机结构

摘要

通过调节分子大小，负载的底物和不同种类的金属，可控地制备金属有机结构。它们的特点是超高真空低温扫描隧道显微镜和密度泛函理论计算。与（2E，4E）-3-methyl-5-（2,6,6-trimethylcyclohex-1-enyl）penta-2,4-dienoic acid（2E，4E）-3-methyl-5-（2,6,6-trimethylcyclohex-1-enyl）penta-2,4-dienoic acid（ DiA）在四聚体中导致相邻ReA之间的较大间隙，并允许插入分子，从而形成高密度图案。ReA在除Ag（111）以外的反应性较低的Au（111）上形成两种具有不同比例（4：0、3：1、2：2）的两种手性对映异构体的结构。与过渡金属不同，分子与碱金属之间的静电吸引是形成大型四方岛的起源。