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Molecules 2017, 22(5), 740; doi:10.3390/molecules22050740

Off-Center Rotation of CuPc Molecular Rotor on a Bi(111) Surface and the Chiral Feature

School of Physical Science and Technology, MOE Key Laboratory on Luminescence and Real-Time Analysis, Southwest University, Chongqing 400715, China
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Academic Editor: Augusto C. Tomé
Received: 10 April 2017 / Revised: 30 April 2017 / Accepted: 2 May 2017 / Published: 4 May 2017
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Abstract

Molecular rotors with an off-center axis and the chiral feature of achiral CuPc molecules on a semi-metallic Bi(111) surface have been investigated by means of a scanning tunneling microscopy (STM) at liquid nitrogen (LN2) temperature. The rotation axis of each CuPc molecular rotor is located at the end of a phthalocyanine group. As molecular coverage increases, the CuPc molecules are self-assembled into various nanoclusters and finally into two-dimensional (2D) domains, in which each CuPc molecule exhibits an apparent chiral feature. Such chiral features of the CuPc molecules can be attributed to the combined effect of asymmetric charge transfer between the CuPc and Bi(111) substrate, and the intermolecular van der Waals interactions. View Full-Text
Keywords: scanning tunneling microscopy (STM); CuPc molecules; off-center rotation; semi-metallic Bi; chiral feature scanning tunneling microscopy (STM); CuPc molecules; off-center rotation; semi-metallic Bi; chiral feature
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Sun, K.; Tao, M.-L.; Tu, Y.-B.; Wang, J.-Z. Off-Center Rotation of CuPc Molecular Rotor on a Bi(111) Surface and the Chiral Feature. Molecules 2017, 22, 740.

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