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Structural Comparison of Self-Organized Adlayers of Ligands and Their Metal-Coordinated Complexes on a Au(111)Surface:An STM Study

机译:Au(111)表面上配体及其金属配位配合物的自组织涂层的结构比较:STM研究

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Scanning tunneling microscopy(STM)was employed to investigate the adsorption of the linear-spacer-bridged ligands bis(pyrrol-2-yl-methyl-eneamine)(BPMB and BPMmB),and their Zn~(II)-coordinated complexes,BPMB/Zn~(II)and BPMmB/Zn~(II),onto a Au(111)surface in 0.1 M HClO_4 solution.Both the ligands,with different spacer bridges,and their Zn~(II)complexes adsorb onto the Au(111)surface and self-organize into highly ordered two-dimensional arrays.The complexes BPMB/Zn~(II)and BPMmB/Zn~(II)appear in helical and triangular conformations,respectively,consistent with their chemical structures.Although the metal complexes include ligands,the assembled structures and adlayer symmetries of the ligands and complexes are totally different.The structures and intramolecular features obtained by high-resolution STM imaging are discussed.The results should be important in fabricating surface supramolecular structures.
机译:采用扫描隧道显微镜(STM)研究了线性间隔桥联的配体双(吡咯-2-烷基-甲基亚胺)(BPMB和BPMmB)及其锌〜(II)配位化合物BPMB的吸附/ Zn〜(II)和BPMmB / Zn〜(II)在0.1 M HClO_4溶液中的Au(111)表面上。两个具有不同间隔桥的配体及其Zn〜(II)络合物均吸附在Au(111)上。 111)表面和自组织成高度有序的二维阵列。BPMB / Zn〜(II)和BPMmB / Zn〜(II)的配合物分别以螺旋和三角形构型出现,与其化学结构一致。配合物包括配体,配体和配合物的组装结构和吸附层对称性完全不同。讨论了通过高分辨率STM成像获得的结构和分子内特征。研究结果对制备表面超分子结构具有重要意义。

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