Functionalization of Hydrogenated Chemical Vapour Deposition-Grown Graphene by On-Surface Chemical Reactions

Karolina Drogowska; Petr Kovaříček; Martin Kalbáč

doi:10.1002/chem.201605385

Functionalization of Hydrogenated Chemical Vapour Deposition-Grown Graphene by On-Surface Chemical Reactions

Chemistry. 2017 Mar 23;23(17):4073-4078. doi: 10.1002/chem.201605385. Epub 2017 Jan 27.

Authors

Karolina Drogowska¹, Petr Kovaříček¹, Martin Kalbáč¹

Affiliation

¹ Department of Low Dimensional Systems, J. Heyrovsky Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejskova 2155/3, 18223, Prague 8, Czech Republic.

PMID: 27984666
DOI: 10.1002/chem.201605385

Abstract

The reactivity of hydrogenated graphene when treated with oxidising agents, KMnO₄ and KIO₄ , as well as alkylated with benzyl bromide (BnBr) was studied. The probed reactions are strictly limited to the partly hydrogenated form of graphene in which most of the hydrogen atoms are located in activated benzylic/allylic positions. This, in turn, clearly demonstrates the presence of hydrogen attached to the graphene lattice. Attachment of the benzyl group was also unequivocally demonstrated by characteristic vibrations recorded in the surface-enhanced Raman spectra, and all reactions were shown to proceed solely on hydrogenated graphene as evidenced by the comparison with pristine chemical vapour deposition-grown graphene.

Keywords: Raman spectroscopy; functionalization; graphene; hydrogenation; surface chemistry.