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@ARTICLE{Weiss:827677,
author = {Weiss, Henning and Mars, Julian and Li, Hailong and
Kircher, Gunnar and Ivanova, Oxana and Feoktystov, Artem and
Soltwedel, Olaf and Bier, Markus and Mezger, Markus},
title = {{M}esoscopic {C}orrelation {F}unctions in {H}eterogeneous
{I}onic {L}iquids},
journal = {The journal of physical chemistry / B},
volume = {121},
number = {3},
issn = {1089-5647},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2017-01790},
pages = {620 - 629},
year = {2017},
abstract = {A common feature of ionic liquids composed of cations with
long aliphatic side chains is structural heterogeneities on
the nanometer length scale. This so-called microphase
separation arises from the clustering of aliphatic moieties.
The temperature dependence of the liquid bulk structure was
studied by small-angle X-ray and neutron scattering for a
set of methylimidazolium ([C18C1im]+, [C22C1im]+) based
ionic liquids with tris(pentafluoroethyl)trifluorophosphate
([FAP]−), bis(trifluoromethylsulfonyl)imide ([NTf2]−),
and bis(nonafluorobutylsulfonyl)imide ([NNf2]−) anions.
The experimental data is quantitatively analyzed using a
generalized Teubner–Strey model. Discussion of the
resulting periodicity d and correlation length ξ shows that
the structural heterogeneities are governed by the interplay
between the alkyl chain length, the geometry of the anion,
and entropic effects. Connections between the mesoscopic
correlation functions, density, and entropy of fusion are
discussed in comparison to alcohols. The observed
dependencies allow predictions on the mesoscopic correlation
functions based on macroscopic bulk quantities.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1 /
JCNS-2},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-2-20110106},
pnm = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
Neutron Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)KWS1-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000393009100016},
doi = {10.1021/acs.jpcb.6b11220},
url = {https://juser.fz-juelich.de/record/827677},
}