Self-recognition and self-selection in multicomponent supramolecular coordination networks on surfaces
Self-recognition and self-selection in multicomponent supramolecular coordination networks on surfaces
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DOI：
10.1073/pnas.0704882104
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发表时间：
2007-11-13
影响因子：
11.1
通讯作者：
Kern, Klaus
中科院分区：
文献类型：
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作者：
Langner, Alexander;Tait, Steven L.;Kern, Klaus
自识别、自选择和动态自组织对于所有超分子系统的组装都是至关重要的，但分子水平的信息通常是不可访问的。我们提出了这些关键步骤的直接例子，通过使用扫描隧道显微镜研究互补的有机配体在铜基板上的混合物。配位体与铁原子协同形成矩形多组分隔室的有序阵列，其尺寸和形状可以通过从互补配位体家族中选择所需长度的配位体来故意调整。我们明确地表明，高度有序的超分子阵列可以产生从冗余的配体混合物的分子自我识别和选择，使有效的纠错和协同性，并显示一个例子失败的自我选择，由于在配体混合物中的容错性，导致无序的结构。
Self-recognition, self-selection, and dynamic self-organization are of fundamental importance for the assembly of all supramolecular systems, but molecular-level information is not generally accessible. We present direct examples of these critical steps by using scanning tunneling microscopy to study mixtures of complementary organic ligands on a copper substrate. The ligands coordinate cooperatively with iron atoms to form well ordered arrays of rectangular multicomponent compartments whose size and shape can be deliberately tuned by selecting ligands of desired length from complementary ligand families. We demonstrate explicitly that highly ordered supramolecular arrays can be produced from redundant ligand mixtures by molecular self-recognition and -selection, enabled by efficient error correction and cooperativity, and show an example of failed self-selection due to error tolerance in the ligand mixture, leading to a disordered structure.