CHIRAL SUPRAMOLECULAR SELF-ASSEMBLY OF 2,2’:6’,2”-TERPYRIDINE-4’-CARBOXYLIC ACID MOLECULES CHEMICALLY ADSORBED ON Cu(111)

Danfeng Jiang, Yan Lu, Jie Ling, Xinli Leng, Xiaoqing Liu and Li Wang
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Danfeng Jiang: Department of Physics, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
Yan Lu: Department of Physics, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
Jie Ling: Department of Physics, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
Xinli Leng: Department of Physics, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
Xiaoqing Liu: Department of Physics, Nanchang University, Nanchang, Jiangxi 330031, P. R. China
Li Wang: Department of Physics, Nanchang University, Nanchang, Jiangxi 330031, P. R. China†Nanoscale Science and Technology Laboratory, Institute for Advanced Study, Nanchang University, Nanchang, Jiangxi 330031, P. R. China

Surface Review and Letters (SRL), 2016, vol. 23, issue 06, 1-8

Abstract: In this paper, large-area chiral supramolecular self-assembly of 2,2’:6’,2”-terpyridine-4’-carboxylic acid (C16H11N3O2; Y) molecules on Cu(111) is studied using scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. The basic building blocks of such a self-assembled monolayer are triangular vortex-shaped supramolecular structures containing three twisted Y molecules. Chirality is maintained and transferred from one vortex to the adjacent vortex in successive molecular domains within the same atomic terrace. The twisted Y molecule, bridging two nearest-neighbor Cu atoms, is stabilized by symmetric Cu–O bonds on the surface. The near perpendicularity of these bonds to the surface is the main reason for the formation of “standing-up” Y molecules.

Keywords: Chirality; self-assembly; triangular vortex; chemisorption; scanning tunneling microscopy (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1142/S0218625X1650061X

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