Here is reported a novel strategy of non-covalent functionalization of graphene to avoid the electronic coupling between this semi-metal and directly adsorbed optically active molecules. Graphene-confined supramolecular host-guest recognition is used to elaborate an emitting hybrid platform. It is shown that the cavities of an on-monolayer graphene nanoporous self-assembled network are able to trap zinc phthalocyanine molecules coordinated to an emitting axial ligand. As a result, the emission of the hybrid system exhibits the same features as the isolated molecular emitter, demonstrating that the fluorescence is not quenched by graphene and that the well-controlled inter-chromophore distance prevents any interaction between the dyes. Furthermore, an in-depth modelling study confirms the weak interaction between the out of plane emitting moieties and the monolayer graphene. This work opens a new avenue for the realization of innovative light-responsive graphene-based devices in nanophotonics and optoelectronics.
Bibliographical noteFunding Information:
This research was supported by Global Research Laboratory (GRL) through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2016K1A1A2912753), Brain Pool program funded by the Ministry of Science and ICT through the National Research Foundation of Korea (2018H1D3A2001751), and ANR STACSAMGRAPH project, grant ANR-18-CE09-0030 of the French Agence Nationale de la Recherche. B. K. and E. K. thank Dr David Kreher (IPCM, Sorbonne Université, France). A.-J. A. thanks Dr Fabrice Charra (CEA Saclay, SPEC, France) for helpful discussions regarding confocal microscopy. The authors thank the SYSPROD project and AXELERA Pôle de Compétitivitéfor financial support (PSMN Data Center).
© 2020 The Royal Society of Chemistry.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Process Chemistry and Technology
- Electrical and Electronic Engineering