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Synthesis And Excited State Processes of Arrays Containing Amine-Rich Carbon Dots and Unsymmetrical Rylene Diimides

preprint
revised on 17.06.2020 and posted on 19.06.2020 by Luka Dordevic, Michele Cacioppo, Francesca Arcudi, Tobias Scharl, Philipp Haines, Alejandro Cadranel, Dirk M. Guldi, Maurizio Prato

Combining carbon dots (CDs) with π-extended chromophores is an attractive way to study the electronic and energy processes of the former as a key step to many applications, including photosensing, photocatalysis, or photosensitization. CDs, in conjugation with chromophores, can have value in preparing donor-acceptor hybrids, and can also be used as scaffolds to support electronic communication between dyes. In this work, we conjugate two different rylene diimides, naphthalene and perylene diimides (NDI and PDI, respectively), with amorphous nitrogen-doped carbon dots. We take advantage of the imidization reaction between the amine rich surface of the carbon dots and the monimide monoanhydride precursors of NDIs and PDIs, under microwave assisted conditions. The resulting (nano)hybrids were characterized also by spectroscopic methods. In particular, time-resolved spectroscopy for the multichromophoric array, consisting of CDs and both rylene diimides, allowed us to elucidate the complex inter-chromophoric interactions taking place in the excited state.

Funding

University of Trieste

INSTM

AXA Research Fund

Italian Ministry of Education MIUR (cofin Prot. 2017PBXPN4)

Maria de Maeztu Units of Excellence Program from the Spanish State Research Agency (MDM-2017-0720)

Deutsche Forschungsgemeinschaft (DFG)

History

Email Address of Submitting Author

dordevic.luka@gmail.com

Institution

University of Trieste

Country

Italy

ORCID For Submitting Author

0000-0002-8346-7110

Declaration of Conflict of Interest

no conflicts of interest

Exports