2024-03-28T22:23:26Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/608542022-06-23T11:00:26Zcom_10261_56com_10261_3col_10261_309
2012-11-22T09:43:32Z
urn:hdl:10261/60854
Conductivity and Polarization Processes in Highly Cross-Linked Supported Ionic Liquid-Like Phases
García-Bernabé, Abel
Compañ, Vicente
Burguete, M. Isabel
García-Verdugo, Eduardo
Karbass, Naima
Luis, Santiago V.
Riande, Evaristo
Dirección General de Investigación Científica y Técnica, DGICT (España)
Instituto Valenciano de Competitividad Empresarial
Ministerio de Ciencia y Tecnología (España)
Bancaixa
Universidad Jaime I
Supported ionic liquid-like phases were prepared by anchoring imidazolium moieties onto highly crosslinked
poly(p-chloromethylstyrene-co-divinylbenzene) monolithic matrixes. The influence of the chemical
nature of the anions on the response of supported ionic liquid-like phases to electrical perturbation fields was
studied by impedance spectroscopy over wide ranges of frequency and temperature. The exchange of the
chloride anions (Cl-) by bis(trifluormethanesulfonyl)amide anions (NTf2
-) greatly affects the psychic-chemical
properties of the resulting material. The equivalent circuit that describes the impedance response of the SILLP
materials used in this study to electrical perturbation fields is a resistance independent of frequency in series
with a parallel Rp-CPE circuit. At high frequencies the CPE has the behavior of a capacitance. The ionic
conductivity of the system increases 2 orders of magnitude by exchanging Cl- anions for NTf2
-. Despite the
apparent high cross-linking degree of the supporter, the systems having imidazolium units with Cl- and NTf2
-
as counterions apparently exhibit a glass-liquid transition in the vicinity of 343 K (70 °C) and 313 K (40
°C), respectively. Dipolar relaxations and conductive process are discussed in terms of chain mobility
2012-11-22T09:43:32Z
2012-11-22T09:43:32Z
2010
artículo
Journal of Physical Chemistry C 114 : 7030–7037 (2010)
1932-7447
http://hdl.handle.net/10261/60854
10.1021/jp910535z
http://dx.doi.org/10.13039/501100006280
http://dx.doi.org/10.13039/501100008737
http://dx.doi.org/10.13039/501100004834
eng
http://dx.doi.org/10.1021/jp910535z
closedAccess
American Chemical Society