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Topology selectivity of a conformationally flexible precursor through selenium doping

Author

Listed:
  • Liangliang Cai

    (National University of Singapore)

  • Tianhao Gao

    (National University of Singapore)

  • Andrew T. S. Wee

    (National University of Singapore)

Abstract

Conformational arrangements within nanostructures play a crucial role in shaping the overall configuration and determining the properties, for example in covalent/metal organic frameworks. In on-surface synthesis, conformational diversity often leads to uncontrollable or disordered structures. Therefore, the exploration of controlling and directing the conformational arrangements is significant in achieving desired nanoarchitectures. Herein, a conformationally flexible precursor 2,4,6-tris(3-bromophenyl)−1,3,5-triazine is employed, and a random phase consisting of C3h and Cs conformers is firstly obtained after deposition of the precursor on Cu(111) at room temperature to 365 K. At low coverage (0.01 ML) selenium doping, we achieve the selectivity of the C3h conformer and improve the nanopore structural homogeneity. The ordered two-dimensional metal organic nanostructure can be fulfilled by selenium doping from room temperature to 365 K. The formation of the conformationally flexible precursor on Cu(111) is explored through the combination of high-resolution scanning tunneling microscopy and non-contact atomic force microscopy. The regulation of energy diagrams in the absence or presence of the Se atom is revealed by density functional theory calculations. These results can enrich the on-surface synthesis toolbox of conformationally flexible precursors, for the design of complex nanoarchitectures, and for future development of engineered nanomaterials.

Suggested Citation

  • Liangliang Cai & Tianhao Gao & Andrew T. S. Wee, 2024. "Topology selectivity of a conformationally flexible precursor through selenium doping," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47614-9
    DOI: 10.1038/s41467-024-47614-9
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    1. Ignacio Piquero-Zulaica & Jorge Lobo-Checa & Ali Sadeghi & Zakaria M. Abd El-Fattah & Chikahiko Mitsui & Toshihiro Okamoto & Rémy Pawlak & Tobias Meier & Andrés Arnau & J. Enrique Ortega & Jun Takeya , 2017. "Precise engineering of quantum dot array coupling through their barrier widths," Nature Communications, Nature, vol. 8(1), pages 1-6, December.
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