Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/97240
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dc.contributor.authorChen, Zhengjianen
dc.contributor.authorXue, Tongen
dc.contributor.authorLee, Jong-Minen
dc.date.accessioned2013-06-25T02:06:48Zen
dc.date.accessioned2019-12-06T19:40:30Z-
dc.date.available2013-06-25T02:06:48Zen
dc.date.available2019-12-06T19:40:30Z-
dc.date.copyright2012en
dc.date.issued2012en
dc.identifier.citationChen, Z., Xue, T., & Lee, J.-M. (2012). What causes the low viscosity of ether-functionalized ionic liquids? Its dependence on the increase of free volume. RSC advances, 2(28), 10564-10574.en
dc.identifier.issn2046-2069en
dc.identifier.urihttps://hdl.handle.net/10356/97240-
dc.description.abstractA series of 12 ether-functionalized room temperature ionic liquids (RTILs) and their alkyl counterparts (short of an oxygen atom) were prepared and characterized to investigate the reason for the alkoxy chain effect on decreasing viscosity and how to best apply it. In addition to the ability of the alkoxy chains to decrease viscosity (ηO/η, as low as 0.594) and its activation energy (ΔEη, as low as -4.14 kJ mol−1), they were also found to be able to increase the total free volume (ΔFVO, up to 4.93 mL mol−1), by using density and surface tension. Furthermore, both the obtained ηO/η and ΔEη values for the 12 pairs of RTILs show a strong decreasing dependence on ΔFVO. Accordingly, the reason for the alkoxy chain effect on decreasing viscosity was proposed to be due to the ability of the highly flexible alkoxy chains to increase the total free volume, which offers the convenience of transport for the adjacent molecules. To maximize this effect, the alkoxy groups were supposed to contain a rod-like alkyl tail and a short –CH2– spacer between the ether O atom and the cationic N atom, and be in an environment without hydrogen bond donors. Generally, the ether-functionalized pyrrolidinium and ammonium RTILs possess high conductivity (up to 4.97 mS cm−1 at 25 °C) and wide electrochemical windows (~5.75 V), indicating their significant promise for electrochemical applications.en
dc.language.isoenen
dc.relation.ispartofseriesRSC advancesen
dc.rights© 2012 The Royal Society of Chemistry.en
dc.titleWhat causes the low viscosity of ether-functionalized ionic liquids? Its dependence on the increase of free volumeen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen
dc.identifier.doi10.1039/c2ra21772den
item.fulltextNo Fulltext-
item.grantfulltextnone-
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