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Adsorption characteristic of self‐assembled corrole dimers on HOPG
Author(s) -
Miao Xinrui,
Gao Aimei,
Hiroto Satoru,
Shinokubo Hiroshi,
Osuka Atsuhiro,
Xin Hongliang,
Deng Wenli
Publication year - 2009
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.3011
Subject(s) - corrole , highly oriented pyrolytic graphite , scanning tunneling microscope , x ray photoelectron spectroscopy , molecule , monolayer , tetramer , trimer , crystallography , adsorption , substrate (aquarium) , chemistry , materials science , nanotechnology , dimer , photochemistry , chemical engineering , organic chemistry , oceanography , engineering , enzyme , geology
Our study first focus on two types of corrole dimers oxidized and reduced forms on highly oriented pyrolytic graphite (HOPG) surface. Scanning tunneling microscopy (STM), X‐ray photoelectron spectroscopy (XPS) and contact angle measurement (CAM) were used to investigate the self‐assembled monolayers of corrole dimers adsorbed on HOPG surfaces at room temperature in air. XPS and CAM results have confirmed both two molecules adsorbed on an HOPG surface and formed self‐assembled films, and STM experiments found that the corrole dimers adsorbed on HOPG surfaces form similar lobes. The different stable space structure of the oxidized form molecule (OFM) and reduced form molecule (RFM), led to the diversity of the tetramer structural dimensions. The occurrence of molecular aggregations and assembly was controlled by the interactions between molecular–molecular and molecule–substrate. The electrostatic interactions between the molecules control the geometrical sizes and molecule–substrate interactions determine topographical shapes of the self‐assembled corrole dimers on HOPG surface. Copyright © 2009 John Wiley & Sons, Ltd.