Carbon Nano-onions

Author(s)
M. Eugenia Pérez-Ojeda, Edison Castro, Claudia Kröckel, Matteo Andrea Lucherelli, Ursula Ludacka, Jani Kotakoski, Katharina Werbach, Herwig Peterlik, Manuel Melle-Franco, Julio C. Chacón-Torres, Frank Hauke, Luis Echegoyen, Andreas Hirsch, Gonzalo Abellán
Abstract

Herein we report the synthesis of covalently functionalized carbon nano-onions (CNOs) via a reductive approach using unprecedented alkali-metal CNO intercalation compounds. For the first time, an in situ Raman study of the controlled intercalation process with potassium has been carried out revealing a Fano resonance in highly doped CNOs. The intercalation was further confirmed by electron energy loss spectroscopy and X-ray diffraction. Moreover, the experimental results have been rationalized with DFT calculations. Covalently functionalized CNO derivatives were synthesized by using phenyl iodide and n-hexyl iodide as electrophiles in model nucleophilic substitution reactions. The functionalized CNOs were exhaustively characterized by statistical Raman spectroscopy, thermogravimetric analysis coupled with gas chromatography and mass spectrometry, dynamic light scattering, UV-vis, and ATR-FTIR spectroscopies. This work provides important insights into the understanding of the basic principles of reductive CNOs functionalization and will pave the way for the use of CNOs in a wide range of potential applications, such as energy storage, photovoltaics, or molecular electronics.

Organisation(s)
Physics of Nanostructured Materials, Dynamics of Condensed Systems
External organisation(s)
Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), University of Texas at El Paso, Universitat de València, University of Aveiro, Yachay Tech University
Journal
Journal of the American Chemical Society
Volume
143
Pages
18997–19007
No. of pages
11
ISSN
0002-7863
DOI
https://doi.org/10.1021/jacs.1c07604
Publication date
11-2021
Peer reviewed
Yes
Austrian Fields of Science 2012
210004 Nanomaterials, 103018 Materials physics
ASJC Scopus subject areas
Catalysis, Chemistry(all), Biochemistry, Colloid and Surface Chemistry
Portal url
https://ucris.univie.ac.at/portal/en/publications/carbon-nanoonions(98365ff2-65c1-481e-a710-0772dc46e82f).html