Surface studies of ionic liquids are particularly important for all
kinds of multiphasic operations employing ionic liquids, e.g. biphasic
homogeneous catalysis or supported ionic liquid phase catalysis. Using
X-ray photoelectron spectroscopy (XPS), the surface composition of the
model system 1-ethyl-3-methylimidazolium ethylsulfate
EMIMEtOSO3 was investigated. By comparing two different samples
of this ionic liquid from two different origins, we observed a decisive
influence of silicon containing impurities on composition and structure
of the surface. For the case of the impurities containing ionic liquid,
our angle-dependent XPS data are in agreement with a model of a surface
layer consisting of highly oriented ionic liquid molecules. From a
fundamental point of view, our study may be of general relevance for
the understanding, of the chemistry of liquid surfaces in general.
%0 Journal Article
%1 ISI:000243138700013
%A Gottfried, J. M.
%A Maier, F.
%A Rossa, J.
%A Gerhard, D.
%A Schulz, P. S.
%A Wasserscheid, P.
%A Steinrueck, H. P.
%D 2006
%J ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH
IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
%K Surface
%N 10-11
%P 1439-1453
%R 10.1524/zpch.2006.220.10.1439
%T Surface studies on the ionic liquid 1-ethyl-3-methylimidazolium
ethylsulfate using X-ray photoelectron spectroscopy (XPS)
%V 220
%X Surface studies of ionic liquids are particularly important for all
kinds of multiphasic operations employing ionic liquids, e.g. biphasic
homogeneous catalysis or supported ionic liquid phase catalysis. Using
X-ray photoelectron spectroscopy (XPS), the surface composition of the
model system 1-ethyl-3-methylimidazolium ethylsulfate
EMIMEtOSO3 was investigated. By comparing two different samples
of this ionic liquid from two different origins, we observed a decisive
influence of silicon containing impurities on composition and structure
of the surface. For the case of the impurities containing ionic liquid,
our angle-dependent XPS data are in agreement with a model of a surface
layer consisting of highly oriented ionic liquid molecules. From a
fundamental point of view, our study may be of general relevance for
the understanding, of the chemistry of liquid surfaces in general.
@article{ISI:000243138700013,
abstract = {{Surface studies of ionic liquids are particularly important for all
kinds of multiphasic operations employing ionic liquids, e.g. biphasic
homogeneous catalysis or supported ionic liquid phase catalysis. Using
X-ray photoelectron spectroscopy (XPS), the surface composition of the
model system 1-ethyl-3-methylimidazolium ethylsulfate
{[}EMIM]{[}EtOSO3] was investigated. By comparing two different samples
of this ionic liquid from two different origins, we observed a decisive
influence of silicon containing impurities on composition and structure
of the surface. For the case of the impurities containing ionic liquid,
our angle-dependent XPS data are in agreement with a model of a surface
layer consisting of highly oriented ionic liquid molecules. From a
fundamental point of view, our study may be of general relevance for
the understanding, of the chemistry of liquid surfaces in general.}},
added-at = {2009-06-29T17:55:14.000+0200},
author = {Gottfried, J. M. and Maier, F. and Rossa, J. and Gerhard, D. and Schulz, P. S. and Wasserscheid, P. and Steinrueck, H. P.},
biburl = {https://www.bibsonomy.org/bibtex/2a4091cb18f7055fd4d13ad7614fd0834/psschulz},
doi = {{10.1524/zpch.2006.220.10.1439}},
interhash = {65fcba5cb67d5d1d105754eb3233f175},
intrahash = {a4091cb18f7055fd4d13ad7614fd0834},
issn = {{0942-9352}},
journal = {{ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH
IN PHYSICAL CHEMISTRY \& CHEMICAL PHYSICS}},
keywords = {Surface},
number = {{10-11}},
pages = {{1439-1453}},
timestamp = {2009-06-29T17:57:08.000+0200},
title = {{Surface studies on the ionic liquid 1-ethyl-3-methylimidazolium
ethylsulfate using X-ray photoelectron spectroscopy (XPS)}},
unique-id = {{ISI:000243138700013}},
volume = {{220}},
year = {{2006}}
}