View : 55 Download: 0

Covalent modification of multiwalled carbon nanotubes with imidazolium-based ionic liquids: Effect of anions on solubility

Title
Covalent modification of multiwalled carbon nanotubes with imidazolium-based ionic liquids: Effect of anions on solubility
Authors
Park M.J.Lee J.K.Lee B.S.Lee Y.-W.Choi I.S.Lee S.-G.
Ewha Authors
이상기
SCOPUS Author ID
이상기scopus
Issue Date
2006
Journal Title
Chemistry of Materials
ISSN
0897-4756JCR Link
Citation
Chemistry of Materials vol. 18, no. 6, pp. 1546 - 1551
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Multiwalled carbon nanotubes (MWCNTs) were covalently modified with imidazolium salt-based ionic liquids (ILs). Coupling of acid chloride-functionalized MWCNTs with commercially available (3-aminopropyl) imidazole, followed by the reaction with n-butyl bromide, afforded 1-butylimidazolium bromide salt-functionalized MWCNTs (f-3a). The bromide anion of f-3a could be exchanged with BF 4 -, PF 6 -, and NTf 2 - (N,N-bis((trifluoromethyl) sulfonyl)amide) by metathesis and afforded functionalized MWCNTs, f-3b (BF 4 -), f-3c (PF 6 -), and f-3d (NTf 2 -), bearing different counteranions. Raman, IR, NMR, TGA, and XPS analyses clearly confirmed covalent functionalization and imidazolium salt formation as well as anion exchange of the IL-functionalized MWCNTs. UV-vis data imply that counteranions have an effect on the relative solubility of the IL-functionalized MWCNTs in water: The solubility of f-3 in water is of the order f-3a (Br -) > f-3b (BF 4 -) > f-3c (PF 6 -) > f-3d (NTf 2 -), and the water-soluble f-3a was phase-transferred from the aqueous phase to the chloroform phase via simple anion exchange with NTf 2 -. All of the IL-functionalized MWCNTs, including the water-soluble f-3a, exhibited a preferential solubility in an ionic liquid, [bmim][NTf 2]. © 2006 American Chemical Society.
DOI
10.1021/cm0511421
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE