Solution STM images of porphyrins on HOPG reveal that subtle differences in molecular structure dramatically alter packing geometry
Solution STM images of porphyrins on HOPG reveal that subtle differences in molecular structure dramatically alter packing geometry
复制标题
DOI：
10.1142/s1088424605000484
复制
发表时间：
2005-06
影响因子：
1.5
通讯作者：
Z. Zou;Lingyun Wei;F. Chen;Zhiming Liu;P. Thamyongkit;Robert S. Loewe;J. Lindsey;U. Mohideen;D. Bocian
中科院分区：
文献类型：
--
作者：
Z. Zou;Lingyun Wei;F. Chen;Zhiming Liu;P. Thamyongkit;Robert S. Loewe;J. Lindsey;U. Mohideen;D. Bocian
溶液STM图像报告为自由基八乙基卟啉（H2OEP）和铜（II）和锌（II）螯合物（CuOEP和ZnOEP）HOPG在1，2-二氯苯溶液中，在环境条件下。H2OEP和CuOEP各自形成准正方形晶格，而ZnOEP在表面上形成准六边形晶格。任何两种卟啉的二元混合物在HOPG表面上形成有序的双层结构，其中一种物质占据另一种物质阵列的桥位。所有的混合吸附层表现出准六方晶格具有较高的堆积密度比单组分吸附层。总的来说，这些观察结果表明，吸附层的结构是由一个复杂的相互作用的底物分子和分子分子之间的相互作用。
Solution STM images are reported for free-base octaethylporphyrin (H2OEP) and the Cu(II) and Zn(II) chelates (CuOEP and ZnOEP) on HOPG in 1,2-dichlorobenzene solution under ambient conditions. H2OEP and CuOEP each form a quasi-square lattice, whereas ZnOEP forms a quasi-hexagonal lattice on the surface. The binary mixture of any two of the porphyrins forms a well-ordered two-layer structure on the HOPG surface, with one species occupying the bridge sites of the array of the other species. All of the mixed adlayers exhibit a quasi-hexagonal lattice with a higher packing density than the single-component adlayers. Collectively, these observations indicate that the structure of the adlayers is controlled by a complex interplay of substrate-molecule and molecule-molecule interactions.