Assessing the Photoinduced Electron-Donating Behavior of Carbon Nanodots in Nanoconjugates

Carbon nanodots (CNDs) undergo electron transfer in different scenarios. Previous studies have mainly focused on the electron-accepting features of CNDs in covalently linked donor–acceptor nanoconjugates. In view of this, we decided to carry out in this study the formation of covalently linked nanoc...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2020-12, Vol.142 (48), p.20324-20328
Main Authors: Ferrer-Ruiz, Andrés, Scharl, Tobias, Rodríguez-Pérez, Laura, Cadranel, Alejandro, Herranz, M. Ángeles, Martín, Nazario, Guldi, Dirk M
Format: Article
Language:English
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Summary:Carbon nanodots (CNDs) undergo electron transfer in different scenarios. Previous studies have mainly focused on the electron-accepting features of CNDs in covalently linked donor–acceptor nanoconjugates. In view of this, we decided to carry out in this study the formation of covalently linked nanoconjugates that feature electron-donating pressure synthesized carbon nanodots (pCNDs) and electron-accepting 11,11,12,12-tetracyano-9,10-anthra-p-quinodimethane (TCAQ): pCND-TCAQ. The stability of the one-electron reduced form of TCAQ renders it the acceptor of choice. Detailed structural and electrochemical investigations allowed the characterization of pCND-TCAQ. Furthermore, investigations regarding intramolecular interactions, by means of steady-state and pump–probe transient absorption spectroscopies, allowed detection and characterization of three excited state species, in general, and the pCND •+ -TCAQ •– charge-separated state, in particular.
ISSN:0002-7863
1520-5126
DOI:10.1021/jacs.0c10132