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Enhanced Chemical Stability in the Twisted Dodecagonal Stacking of Two-Dimensional Copper Nanocluster Assemblies

Cite this: J. Phys. Chem. Lett. 2022, 13, 37, 8793–8800
Publication Date (Web):September 14, 2022
https://doi.org/10.1021/acs.jpclett.2c02300
Copyright © 2022 American Chemical Society

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    Deterministic chemical stacking of two-dimensional materials with controlled symmetry is a synthetic chemistry challenge that deserves attention. It is plausible that depending on the angle of stacking the material properties of the assembly could be tuned. Herein, we report 30° twisted stacking of two-dimensional nanosheets of a hexagonal assembly of organic ligand-stabilized Cu nanoclusters formed through a Zn2+-mediated complexation reaction. Electron diffraction in transmission electron microscopy revealed the presence of regions of dodecagonal symmetry with the apparent loss of translation symmetry. Photoluminescence measurements indicated the formation of the stacked assembly in the liquid medium. The as-synthesized twisted stacking structure exhibited superior delayed photoluminescence and chemical stability─in the presence of molecular iodine─as compared to the hexagonal crystal. The discovery can lead to a bright future in exploring new chemical and physical properties through the design of stacked assemblies of luminescent or other materials.

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.jpclett.2c02300.

    • Characterization figures, mass spectrometric result, and FTIR spectra of as-synthesized CuNCs; FTIR spectra of hexagonal and twisted quasiperiodic Zn-CuNC nanosheets; STEM image of the twisted quasiperiodic Zn-CuNCs; calculated parameters from quantum yield, τ, and TRPL measurements; additional TEM images, delayed photoluminescence spectra, and time-resolved delayed decay profiles of hexagonal and twisted quasiperiodic Zn-CuNC nanosheets (PDF)

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    Cited By

    This article is cited by 1 publications.

    1. Manideepa Paul, Arun Chattopadhyay. Modulating the Photoluminescence of Europium through Crystalline Assembly Formation with Gold Nanoclusters and Then Phosphate Ions. The Journal of Physical Chemistry Letters 2023, 14 (50) , 11250-11257. https://doi.org/10.1021/acs.jpclett.3c02834