Synthetic control over the binding configuration of luminescent sp3-defects in single-walled carbon nanotubes

Simon Settele, Felix J. Berger, Sebastian Lindenthal, Shen Zhao, Abdurrahman Ali El Yumin, Nicolas F. Zorn, Andika Asyuda, Michael Zharnikov, Alexander Högele and Jana Zaumseil ()
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Simon Settele: Universität Heidelberg
Felix J. Berger: Universität Heidelberg
Sebastian Lindenthal: Universität Heidelberg
Shen Zhao: Ludwig-Maximilians-Universität München
Abdurrahman Ali El Yumin: Universität Heidelberg
Nicolas F. Zorn: Universität Heidelberg
Andika Asyuda: Universität Heidelberg
Michael Zharnikov: Universität Heidelberg
Alexander Högele: Ludwig-Maximilians-Universität München
Jana Zaumseil: Universität Heidelberg

Nature Communications, 2021, vol. 12, issue 1, 1-10

Abstract: Abstract The controlled functionalization of single-walled carbon nanotubes with luminescent sp3-defects has created the potential to employ them as quantum-light sources in the near-infrared. For that, it is crucial to control their spectral diversity. The emission wavelength is determined by the binding configuration of the defects rather than the molecular structure of the attached groups. However, current functionalization methods produce a variety of binding configurations and thus emission wavelengths. We introduce a simple reaction protocol for the creation of only one type of luminescent defect in polymer-sorted (6,5) nanotubes, which is more red-shifted and exhibits longer photoluminescence lifetimes than the commonly obtained binding configurations. We demonstrate single-photon emission at room temperature and expand this functionalization to other polymer-wrapped nanotubes with emission further in the near-infrared. As the selectivity of the reaction with various aniline derivatives depends on the presence of an organic base we propose nucleophilic addition as the reaction mechanism.

Date: 2021
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DOI: 10.1038/s41467-021-22307-9

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