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Title: Dichlorocarbene-functionalized fluorographene : synthesis and reaction mechanism
Authors: Lazar, Petr
Chua, Chun Kiang
Holá, Kateřina
Zbořil, Radek
Otyepka, Michal
Pumera, Martin
Keywords: DRNTU::Science::Physics
Issue Date: 2015
Source: Lazar, P., Chua, C. K., Holá, K., Zbořil, R., Otyepka, M., & Pumera, M. (2015). Dichlorocarbene-functionalized fluorographene : synthesis and reaction mechanism. Small, 11(31), 3790-3796.
Series/Report no.: Small
Abstract: Halogen functionalization of graphene is an important branch of graphene research as it provides opportunities to tailor the band gap and catalytic properties of graphene. Monovalent C–X bond obviates pitfalls of functionalization with atoms of groups 13, 15, and 16, which can introduce various poorly defined groups. Here, the preparation of functionalized graphene containing both fluorine and chlorine atoms is shown. The starting material, fluorographite, undergoes a reaction with dichlorocarbene to provide dichlorocarbene-functionalized fluorographene (DCC-FG). The material is characterized by X-ray photoelectron spectroscopy, Raman spectroscopy, and high-resolution transmission electron microscopy with X-ray dispersive spectroscopy. It is found that the chlorine atoms in DCC-FG are distributed homogeneously over the entire area of the fluorographene sheet. Further density functional theory calculations show that the mechanism of dichlorocarbene attack on fluorographene sheet is a two-step process. Dichlorocarbene detaches fluorine atoms from fluorographene sheet and subsequently adds to the newly formed sp2 carbons. Halogenated graphene consisting of two (or eventually three) types of halogen atoms is envisioned to find its way as new graphene materials with tailored properties.
ISSN: 1613-6810
DOI: 10.1002/smll.201500364
Rights: © 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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