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@ARTICLE{Kolmangadi:480192,
author = {Kolmangadi, Mohamed and Smales, Glen J. and ZhuoQing, Li
and Yildirim, Arda and Wuckert, Eugen and Eutionnat, Sandy
and Demel, Felix and Huber, Patrick and Laschat, Sabine and
Schönhals, Andreas},
title = {{S}ide {C}hain {L}ength-{D}ependent {D}ynamics and
{C}onductivity in {S}elf-{A}ssembled {I}on {C}hannels},
journal = {The journal of physical chemistry / C},
volume = {126},
number = {27},
issn = {1932-7447},
address = {Washington, DC},
publisher = {Soc.},
reportid = {PUBDB-2022-03558},
pages = {10995 - 11006},
year = {2022},
note = {Waiting for fulltext},
abstract = {We study the molecular mobility and electrical conductivity
of a homologous series of linear shaped columnar ionic
liquid crystals ILCn, (n = 8, 10, 12, 14, 16) using
broadband dielectric spectroscopy (BDS), specific heat
spectroscopy (SHS), and X-ray scattering. We aim to
understand how the alkyl chain length influences the
dynamics and electric conductivity in this system. Two
dielectrically active relaxation modes are observed, the
$γ$ and the $α_{core}$ process, that correspond to the
localized fluctuations of the alkyl chains and cooperative
motions of the aromatic core in the columns, respectively.
Both the $γ$ relaxation and the $α_{core}$ process slow
down with increasing alkyl chain length. SHS reveals one
relaxation process, the $α_{alkyl}$ process that has a
similar temperature dependence as that of the $α_{core}$
process for ILC12, 14, and 16 but shifts to higher
temperature for ILC8 and 10. For ILC12, 14, and 16, the
absolute values of DC conductivity increase by 4 orders of
magnitude at the transition from the plastic crystalline to
hexagonal columnar phase. For ILC8 and 10, the DC
conductivity behavior is similar to ionic liquids, where the
conductivity is coupled with structural relaxation.
Small-angle X-ray investigations reveal that both the
intercolumnar distance and the disorder coherence length
increase with alkyl chain length; conversely, the DC
conductivity decreases monotonically.},
cin = {CIMMS / TUHH},
ddc = {530},
cid = {I:(DE-H253)CIMMS-20211022 / I:(DE-H253)TUHH-20210331},
pnm = {631 - Matter – Dynamics, Mechanisms and Control
(POF4-631)},
pid = {G:(DE-HGF)POF4-631},
experiment = {EXP:(DE-MLZ)NOSPEC-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000829840300001},
doi = {10.1021/acs.jpcc.2c03023},
url = {https://bib-pubdb1.desy.de/record/480192},
}