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).
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Process Chemistry and Technology
- Electrical and Electronic Engineering