Monitoring two-dimensional coordination reactions: Directed assembly of Co-terephthalate nanosystems on Au(111)
Monitoring two-dimensional coordination reactions: Directed assembly of Co-terephthalate nanosystems on Au(111)
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DOI：
10.1021/jp057239s
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发表时间：
2006-03-23
影响因子：
3.3
通讯作者：
Barth, JV
中科院分区：
文献类型：
--
作者：
Clair, S;Pons, S;Barth, JV
我们报道了在重构的Au（111）表面上形成二维Co基配位化合物的扫描隧道显微镜观察。预先组织的钴双层岛阵列被证明是本地的反应位点，这是消耗在形成的钴-对苯二甲酸酯聚集体和规则的纳米多孔网格。后者表现出由光滑基底稳定的平面几何形状。纳米网格基于矩形图案，其被理解为2D对苯二甲酸钴片的固有特征，并且主导准六边形衬底原子晶格的模板影响。Co岛溶解和金属超分子自组装的动力学可以原位监测。进行了补充第一性原理计算，以分析潜在的驱动力，并检查二维金属羧酸盐形成的一般趋势。研究结果表明，在表面的配位化学概念的广泛适用性，而且可以通过使用模板基板空间限制，其潜在的合成安排在散装材料中不可用。
We report scanning tunneling microscopy observations on the formation of 2D Co-based coordination compounds on the reconstructed Au(111) surface. Preorganized arrays of Co bilayer islands are shown to be local reaction sites, which are consumed in the formation of Co-terephthalate aggregates and regular nanoporous grids. The latter exhibit a planar geometry stabilized by the smooth substrate. The nanogrids are based on a rectangular motif, which is understood as an intrinsic feature of a 2D cobaltous terephthalate sheet and dominates over the templating influence of the quasihexagonal Substrate atomic lattice. The dynamics of the Co island dissolution and metallosupramolecular self-assembly could be monitored in situ. Complementary first-principles calculations were performed to analyze the underlying driving forces and to examine general trends in 2D metal-carboxylate formation. The findings indicate the wide applicability of coordination chemistry concepts at surfaces, which moreover can be spatially confined by using templated substrates, and its potential to synthesize arrangements unavailable in bulk materials.