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Azimuthal Dipolar Rotor Arrays on Surfaces
Author(s) -
Hamer Sebastian,
Glasenapp JanSimon,
Röhricht Fynn,
Li Chao,
Berndt Richard,
Herges Rainer
Publication year - 2021
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.202103237
Subject(s) - dipole , scanning tunneling microscope , pyridazine , crystallography , molecule , rotation (mathematics) , rotor (electric) , space (punctuation) , molecular physics , chemical physics , atom (system on chip) , chemistry , nanotechnology , materials science , physics , stereochemistry , geometry , computer science , quantum mechanics , mathematics , embedded system , operating system
A set of dipolar molecular rotor compounds was designed, synthesized and adsorbed as self‐assembled 2D arrays on Ag(111) surfaces. The title molecules are constructed from three building blocks: (a) 4,8,12‐trioxatriangulene (TOTA) platforms that are known to physisorb on metal surfaces such as Au(111) and Ag(111), (b) phenyl groups attached to the central carbon atom that function as pivot joints to reduce the barrier to rotation, (c) pyridine and pyridazine units as small dipolar units on top. Theoretical calculations and scanning tunneling microscopy (STM) investigations hint at the fact that the dipoles of neighboring rotors interact through space through pairs of energetically favorable head‐to‐tail arrangements.