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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
Author(s) -
Yuan QunHui,
Wan LiJun
Publication year - 2006
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200500844
Subject(s) - scanning tunneling microscope , intramolecular force , chemistry , crystallography , metal , supramolecular chemistry , adsorption , self assembly , stereochemistry , nanotechnology , crystal structure , materials science , organic chemistry
Scanning tunneling microscopy (STM) was employed to investigate the adsorption of the linear‐spacer‐bridged ligands bis(pyrrol‐2‐yl‐methyleneamine) (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.