Two-dimensional tessellation by molecular tiles constructed from halogen–halogen and halogen–metal networks

Fang Cheng, Xue-Jun Wu, Zhixin Hu, Xuefeng Lu, Zijing Ding, Yan Shao, Hai Xu, Wei Ji, Jishan Wu and Kian Ping Loh ()
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Fang Cheng: National University of Singapore
Xue-Jun Wu: Nanjing University
Zhixin Hu: Institute of Science, Tianjin University
Xuefeng Lu: National University of Singapore
Zijing Ding: National University of Singapore
Yan Shao: Chinese Academy of Sciences
Hai Xu: National University of Singapore
Wei Ji: Renmin University of China
Jishan Wu: National University of Singapore
Kian Ping Loh: National University of Singapore

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract Molecular tessellations are often discovered serendipitously, and the mechanisms by which specific molecules can be tiled seamlessly to form periodic tessellation remain unclear. Fabrication of molecular tessellation with higher symmetry compared with traditional Bravais lattices promises potential applications as photonic crystals. Here, we demonstrate that highly complex tessellation can be constructed on Au(111) from a single molecular building block, hexakis(4-iodophenyl)benzene (HPBI). HPBI gives rise to two self-assembly phases on Au(111) that possess the same geometric symmetry but different packing densities, on account of the presence of halogen-bonded and halogen–metal coordinated networks. Sub-domains of these phases with self-similarity serve as tiles in the periodic tessellations to express polygons consisting of parallelograms and two types of triangles. Our work highlights the important principle of constructing multiple phases with self-similarity from a single building block, which may constitute a new route to construct complex tessellations.

Date: 2018
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DOI: 10.1038/s41467-018-07323-6

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