Homochiral recognition among organic molecules on copper(110).
The adsorption of a prochiral quinacridone derivative (QA16C) with two alkyl chains of 16 carbon atoms on a Cu(110) surface was investigated with variable-temperature scanning tunneling microscopy. QA16C molecules prefer to assemble at 150 K into short homochiral molecular lines with two enantiomorphous orientations in which the lateral alkyl chains exhibit partial disorder. With increasing sample temperatures, the QA16C lines form larger well-ordered homochiral domains. As a reason for the homochiral recognition, we identify a rigid alignment of the molecule due to the interaction with the substrate. In addition, lateral intermolecular interactions in the form of hydrogen bonding and van der Waals interactions are identified.
Cun
Huanyao
H
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Wang
Yeliang
Y
Yang
Bing
B
Zhang
Lei
L
Du
Shixuan
S
Wang
Yue
Y
Ernst
Karl-Heinz
KH
Gao
Hong-Jun
HJ