期刊
MOLECULES
卷 25, 期 21, 页码 -出版社
MDPI
DOI: 10.3390/molecules25215021
关键词
graphene; cobalt complexes; hybrid material; magneto-chemistry
资金
- Ministry of Education, Youth and Sports of the Czech Republic [LQ1601]
- LTAUSA19060 in the INTER-EXCELLENCE Programme
- GACR [19-01536S]
- ERC under the European Union's Horizon 2020 Research and Innovation Programme [714850]
- Brno University of Technology [CEITEC-VUT-J-20-6514]
- Brno City Municipality
- Palacky University Olomouc project [IGA_PrF_2020_016]
- Grant Agencies of the Slovak Republic (VEGA) [1/0639/18, APVV-19-0087]
- European Research Council (ERC) [714850] Funding Source: European Research Council (ERC)
Studying the properties of complex molecules on surfaces is still mostly an unexplored research area because the deposition of the metal complexes has many pitfalls. Herein, we probed the possibility to produce surface hybrids by depositing a Co(II)-based complex with chalcone ligands on chemical vapor deposition (CVD)-grown graphene by a wet-chemistry approach and by thermal sublimation under high vacuum(.) Samples were characterized by high-frequency electron spin resonance (HF-ESR), XPS, Raman spectroscopy, atomic force microscopy (AFM), and optical microscopy, supported with density functional theory (DFT) and complete active space self-consistent field (CASSCF)/N-electron valence second-order perturbation theory (NEVPT2) calculations. This compound's rationale is its structure, with several aromatic rings for weak binding and possible favorable pi-pi stacking onto graphene. In contrast to expectations, we observed the formation of nanodroplets on graphene for a drop-cast sample and microcrystallites localized at grain boundaries and defects after thermal sublimation.
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