Interface and core relaxation dynamics of IL molecules in nanopores of ordered mesoporous MCM-41: a dielectric spectroscopy study
作者： Alok Kumar Tripathi , Rajendra Kumar Singh
DOI: 10.1039/C6RA04212K
关键词:
摘要: The dynamics of ionic liquid (IL) 1-ethyl-3-methyl imidazolium tetrafluoroborate ([EMIM][BF4]) molecules confined in ordered porous MCM-41 (Mobil Composition Matter no. 41) with an average pore diameter d = 3.4 nm has been investigated by dielectric measurements. appearance a peak the loss tangent suggests presence relaxation IL mesoporous matrices from which two types states were found; wall surface adsorbed and core filled IL. measurements frequency range 1–10 MHz temperature 40–100 °C showed that gets slowed down compared to pore. slowest molecular motions surface-adsorbed results strong interaction between due activation energy is different bulk molecules. Also, Electrode Polarization (EP) phenomenon exists all samples corresponding shifted towards higher region as or amount increases. variation ac conductivity obeys Jonscher power law. dc increases increase loading.
rsc.org
sci-hub.se 参考文章(65)
B. Roling, M. D. Ingram, M. Lange, K. Funke, Role of AgI for ionic conduction in AgI-AgPO 3 glasses Physical Review B. ,vol. 56, pp. 13619- 13622 ,(1997) , 10.1103/PHYSREVB.56.13619
Broadband dielectric spectroscopy Springer. ,(2003) , 10.1007/978-3-642-56120-7
Electrodeposition from Ionic Liquids Wiley-VCH Verlag GmbH & Co. KGaA. ,(2008) , 10.1002/9783527622917
弘幸 大野, Electrochemical aspects of ionic liquids Wiley Interscience. ,(2005)
A. K. Jonscher, The ‘universal’ dielectric response Nature. ,vol. 267, pp. 673- 679 ,(1977) , 10.1038/267673A0
Alok Kumar Tripathi, Yogendra Lal Verma, Rajendra Kumar Singh, Thermal, electrical and structural studies on ionic liquid confined in ordered mesoporous MCM-41 Journal of Materials Chemistry. ,vol. 3, pp. 23809- 23820 ,(2015) , 10.1039/C5TA05090A
Patricia Pérez-Romo, M. de Lourdes Guzmán-Castillo, Héctor Armendáriz-Herrera, Juan Navarrete, D. R. Acosta, J. Asención Montoya, Synthesis of FSM-16 Mesoporous Materials: Effect of the Anion (F-, Cl-, SO42-) in the Ion Exchange Process on the Thermal Stability Langmuir. ,vol. 19, pp. 3446- 3452 ,(2003) , 10.1021/LA026710V
Ronald Göbel, Peter Hesemann, Jens Weber, Eléonore Möller, Alwin Friedrich, Sabine Beuermann, Andreas Taubert, Surprisingly high, bulk liquid-like mobility of silica-confined ionic liquids. Physical Chemistry Chemical Physics. ,vol. 11, pp. 3653- 3662 ,(2009) , 10.1039/B821833A
Shuichi Takahara, Shigeharu Kittaka, Toshinori Mori, Yasushige Kuroda, Toshiyuki Takamuku, Toshio Yamaguchi, Neutron scattering and dielectric studies on dynamics of methanol and ethanol confined in MCM-41 Journal of Physical Chemistry C. ,vol. 112, pp. 14385- 14393 ,(2008) , 10.1021/JP8015062
Carlos Pinilla, M. G. Del Pópolo, Jorge Kohanoff, R. M. Lynden-Bell, Polarization Relaxation in an Ionic Liquid Confined between Electrified Walls Journal of Physical Chemistry B. ,vol. 111, pp. 4877- 4884 ,(2007) , 10.1021/JP067184+