Supramolecular assemblies of trimesic acid on a Cu(100) surface
Supramolecular assemblies of trimesic acid on a Cu(100) surface
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DOI：
10.1021/jp014214u
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发表时间：
2002-07-11
影响因子：
3.3
通讯作者：
Kern, K
中科院分区：
文献类型：
--
作者：
Dmitriev, A;Lin, N;Kern, K
用变温扫描隧道显微镜原位研究了三偏酸(TMA)--1，3，5-苯三甲酸C6H3(COOH)(3)在超高真空中在Cu(100)表面上的吸附和超分子有序性。我们在分子水平上阐明了不同的自组装超分子聚集体的真实空间结构。在较低的温度(类似于200K)下，二维网络演化。它们反映了平躺物种的广泛氢键形成，类似于块状TMA晶体结构中的超分子有序。在室温下，形成更密集的条状排列。由于羧酸盐的形成，它们与导致直立几何结构的成键转变有关。
The adsorption and supramolecular ordering of trimesic acid (TMA), 1,3,5-benzenetricarboxylic acid C6H3(COOH)(3), on a Cu(100) surface has been studied in-situ in ultrahigh vacuum by variable-temperature scanning `tunneling microscopy. We have elucidated the real-space structures of distinct self-assembled supramolecular aggregates at the molecular scale. At low temperatures (similar to200 K), two-dimensional networks evolve. They reflect extensive hydrogen-bond formation of a flat-lying species, similar to supramolecular ordering in the bulk TMA crystal structure. At room temperature, more densely packed stripe arrangements form. They are associated with a bonding transition leading to an upright geometry due to carboxylate formation.