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Octyl‐Decorated Fréchet‐Type Dendrons: A General Motif for Visualisation of Static and Dynamic Behaviour Using Scanning Tunnelling Microscopy?
Author(s) -
Merz Leo,
Güntherodt H.J.,
Scherer Lukas J.,
Constable Edwin C.,
Housecroft Catherine E.,
Neuburger Markus,
Hermann B. A.
Publication year - 2005
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.200400984
Subject(s) - alkyl , scanning tunneling microscope , supramolecular chemistry , molecule , supramolecular chirality , crystallography , monolayer , adsorption , chemistry , materials science , chirality (physics) , self assembly , stereochemistry , nanotechnology , organic chemistry , physics , chiral symmetry breaking , quantum mechanics , quark , nambu–jona lasinio model
A detailed STM study of monolayers of 3,5‐bis[(3,5‐bisoctyloxyphenyl)methyloxy]benzaldehyde and 3,5‐bis[(3,5‐bisoctyloxyphenyl)methyloxy]benzyl alcohol adsorbed on graphite is presented. Very highly resolved scanning tunnelling microscopy images are observed at room temperature in air allowing the analysis of the conformation of the adsorbed molecules. These long‐chain alkyl‐decorated Fréchet‐type dendrons are a powerful assembly motif and initially form a pattern based on trimeric units, assembled into hexagonal host structures with a pseudo‐unit cell of seven molecules, one of which remains highly mobile. Over time, the supramolecular ordering changes from a trimeric into a dimeric pattern. The chirality arising from the adsorption onto a surface of the dendrons is discussed.

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