Investigation into applicability of EQCM methods at elevated temperature for ionic liquids
Investigation into applicability of EQCM methods at elevated temperature for ionic liquids
复制标题
EQCM 方法在高温下对离子液体的适用性研究
DOI：
10.1016/j.electacta.2016.01.233
复制
发表时间：
2016
影响因子：
6.6
通讯作者：
Katsuhiko Tsunashima
中科院分区：
文献类型：
--
作者：
Naoko Sasaya;Masahiko Matsumiya;Sena Murakami;Keiichi Nishihata;Katsuhiko Tsunashima
在这项研究中，在离子液体中，三乙基戊基膦双（三氟甲基磺酰基）酰胺（[P 2225][TFSA]）的密度和粘度对Nd（III）的浓度的依赖性进行了研究。离子液体的密度与Nd（III）浓度呈线性关系，而其粘度则与Nd（III）浓度成比例增加。粘度的Arrhenius图与Vogel-Fulcher-Tammann方程：η= η 0 T-1/2 exp [B/（T-T0）]吻合较好。从共振频率和电阻与离子液体样品粘度（η L）和密度（ρ L）乘积的关系证明了电化学石英晶体微天平（EQCM）在高温离子液体中的适用性。在363 K时，谐振频率和电阻与（η L ρ L）1/2成正比，结果与EQCM分析所用的理论公式一致。
In this study, the dependence of the density and viscosity on the concentration of Nd (III) in an ionic liquid, triethylpentylphosphonium bis (trifluoromethylsulfonyl) amide ([P 2225][TFSA]), was investigated. The density of the ionic liquid showed a linear relationship to the Nd (III) concentration, while its viscosity increased in proportion to the Nd (III) concentration. Furthermore, the Arrhenius plot of the viscosity was in good agreement with the Vogel–Fulcher–Tammann equation: η= η 0 T-1/2 exp [B/(T-T 0)]. The applicability of the electrochemical quartz crystal microbalance (EQCM) in ionic liquids at elevated temperatures was proved from the relationship of the resonance frequency and the resistance to the product of the viscosity (η L) and the density (ρ L) of the ionic liquid samples. The resonance frequency shifts and the resistances were proportional to (η L ρ L) 1/2 at 363 K and the results agreed with the theoretical equations used for EQCM analysis.