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Selective Bromination of Graphene Oxide by the Hunsdiecker Reaction
Author(s) -
Jankovský Ondřej,
Lojka Michal,
Luxa Jan,
Sedmidubský David,
Tomanec Ondřej,
Zbořil Radek,
Pumera Martin,
Sofer Zdeněk
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201702031
Subject(s) - graphene , halogenation , oxide , surface modification , covalent bond , bromine , halogen , materials science , reaction conditions , nanotechnology , chemistry , organic chemistry , catalysis , alkyl
Halogenated graphenes have been attracting great attention in the recent years. The currently used methods are usually non‐specific, and halogen groups are randomly distributed over the graphene. Here we demonstrate a selective graphene functionalization based on a well known reaction mechanism—Hunsdiecker reaction—applied on selective bromination of graphene oxide. The chemical analysis using various spectroscopic methods proved a high efficiency of this functionalization method. Bromination can be carried out under mild conditions without any high temperature or high pressure treatment. The chemical modification led to introduction of up to 20 wt.% of bromine covalently bonded to the graphene skeleton. The modified graphene was characterized in detail using a broad range of microscopic and spectroscopic methods and no significant contamination by reaction by‐products was detected.