1. Organometallic chemistry of graphene: Photochemical complexation of graphene with group 6 transition metals
- Author
-
Mingguang Chen, Wangxiang Li, Mikhail E. Itkis, Áron Pekker, Elena Bekyarova, and Robert C. Haddon
- Subjects
Materials science ,Graphene ,chemistry.chemical_element ,02 engineering and technology ,General Chemistry ,Conductivity ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Photochemistry ,01 natural sciences ,0104 chemical sciences ,law.invention ,chemistry.chemical_compound ,Chromium ,chemistry ,Transition metal ,Covalent bond ,law ,Reagent ,General Materials Science ,0210 nano-technology ,Organometallic chemistry ,Group 2 organometallic chemistry - Abstract
We report the experimental realization of η6-complexes of group 6 transition metals with a single layer graphene using photo-activated reactions with organometallic compounds. The reaction progress was followed by in-situ measurements of the graphene conductivity. We observed that the chromium reagents exert the strongest effect on the electronic properties of graphene, leading to (η6-graphene)CrL [L = C6H6, (CO)3] complexes with enhanced conductivity. Thus, in the case of covalent functionalization of graphene with Cr(CO)6, the conductivity increased by a factor of 4, while the (η6- C6H6)Cr(CO)3 reagent doubled the conductivity producing the least enhancement. This mode of covalent bonding preserves the conjugation and the planarity of the graphene structure and offers a promising route for the preparation of a new class of graphitic materials functionalized with transition metals, which may find applications in optoelectronics, spintronics and magnetic nanodevices.
- Published
- 2018