Linked Life Data

21281941

Source:http://linkedlifedata.com/resource/pubmed/id/21281941

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2011-2-14
pubmed:abstractText
Surfactants with a polycyclic aromatic moiety and a long hydrocarbon chain, carbazole-tailed amphiphilic imidazolium ionic liquids 1-[n-(N-carbazole)alkyl]-3-methylimidazolium bromide [CzC(n)MIm]Br (n=10 and 12), were designed to disperse carbon nanotubes (CNTs) in aqueous solutions. UV-vis-NIR spectra were performed to determine the dispersion of CNTs and the optimal concentration (C(opt)) of [CzC(n)MIm]Br. Compared with [C(n)MIm]Br, [CzC(n)MIm]Br was more effective with the smaller C(opt) and more individual CNTs, reflecting the effect of the carbazole moiety. The adsorption of [CzC(n)MIm]Br molecules on CNTs was investigated by zeta-potential, surface tension, fluorescence, and (1)H NMR. Having zeta-potentials higher than 15mV contributed to the long-term stability of aqueous CNT dispersions. The significant fluorescence quenching and the upfield shift of carbazole protons support the ?-? stacking interaction between carbazole moieties and the ?-networks of CNTs. Meanwhile, the upfield shift of imidazolium protons indicates the cation-? interaction between the imidazolium ions and the ?-networks of CNTs.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Apr
pubmed:issn
1095-7103
pubmed:author
pubmed:copyrightInfo
Copyright © 2011 Elsevier Inc. All rights reserved.
pubmed:issnType
Electronic
pubmed:day
1
pubmed:volume
356
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
190-5
pubmed:year
2011
pubmed:articleTitle
Dispersion of carbon nanotubes by carbazole-tailed amphiphilic imidazolium ionic liquids in aqueous solutions.
pubmed:affiliation
Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan, China.
pubmed:publicationType
Journal Article