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Issue 31, 2018
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Alkyl chain length effects on double-deck assembly at a liquid/solid interface

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Abstract

Controlled double-deck packing is an appealing means to expand upon conventional 2D self-assembly which is critical in crystal engineering, yet it is rare and poorly understood. Herein, we report the first systematic study of double-deck assembly in a series of alkylated aminoquinone derivatives at the liquid–solid interface. The competition between the fraction of alkyl chains adsorbed on the surface and the optimal conformation of the alkyl chains near the head group leads to a stepwise structural transformation ranging from complete double-deck packing to complete monolayer packing. Alkyl chains on the bottom or top layer of the double-deck assemblies were selectively visualized by carefully tuning the scanning tunneling microscopy settings. A method to easily identify mirror image domains was discovered based on the coincidence of domain boundaries with a graphite main axis. The effect of molecular symmetry and metal complexation on the formation of the double-deck assembly was also explored. Based on 2D crystal engineering principles, this bottom-up double-deck assembly can potentially provide an essential toehold for constructing precise 3D hierarchical structures.

Graphical abstract: Alkyl chain length effects on double-deck assembly at a liquid/solid interface

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Publication details

The article was received on 24 May 2018, accepted on 17 Jul 2018 and first published on 24 Jul 2018


Article type: Paper
DOI: 10.1039/C8NR04220A
Citation: Nanoscale, 2018,10, 14993-15002
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    Alkyl chain length effects on double-deck assembly at a liquid/solid interface

    Y. Fang, M. Cibian, G. S. Hanan, D. F. Perepichka, S. De Feyter, L. A. Cuccia and O. Ivasenko, Nanoscale, 2018, 10, 14993
    DOI: 10.1039/C8NR04220A

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