Brominated graphene as a versatile precursor for multifunctional grafting
File(s)Chem. Sci., 2018, 9, 209.pdf (712.25 KB)
Published version
Author(s)
Au, Heather
Rubio, Noelia
Shaffer, Milo SP
Type
Journal Article
Abstract
A non-destructive and versatile chemical reduction method was used to dissolve and subsequently brominate few-layer graphene sheets (FLGs); the direct covalent attachment of bromine to the graphene framework was demonstrated by X-ray photoelectron spectroscopy (XPS). The brominated few-layer graphenes (FLG-Br) provide a convenient, stable, liquid-phase precursor, suitable for the synthesis of a variety of directly functionalised graphenes. As an example, the FLG-Br species was used to initiate atom transfer radical polymerisation (ATRP), to obtain poly(methyl methacrylate) (PMMA)-grafted graphene (FLG-PMMA), which was six times more dispersible in acetone than controls. In addition, the FLG-Br is active for nucleophilic substitution reactions, as illustrated by the preparation of methoxypolyethylene glycol (mPEG)- and OH-substituted derivatives. The products were characterised by thermogravimetric analysis coupled with mass spectrometry (TGA-MS), XPS and Raman spectroscopy. Grafting ratios (GR) for these polymer-grafted materials varied between 6 and 25%; even at these GRs, all graphene derivatives showed increased solubility in organic solvents.
Date Issued
2018-01-07
Date Acceptance
2017-09-29
Citation
Chemical Science, 2018, 9 (1), pp.209-217
ISSN
2041-6520
Publisher
Royal Society of Chemistry
Start Page
209
End Page
217
Journal / Book Title
Chemical Science
Volume
9
Issue
1
Copyright Statement
This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.
Subjects
Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Chemistry
WALLED CARBON NANOTUBES
GRAPHITE-INTERCALATION COMPOUNDS
TRANSFER RADICAL POLYMERIZATION
IN-SITU POLYMERIZATION
RAMAN-SPECTROSCOPY
MOLECULAR-WEIGHT
FUNCTIONALIZATION
COVALENT
CHEMISTRY
OXIDE
Publication Status
Published