CRITICAL PHENOMENA IN IONIC FLUIDS : A SYSTEMATIC INVESTIGATION OF THE CROSSOVER BEHAVIOR
CRITICAL PHENOMENA IN IONIC FLUIDS : A SYSTEMATIC INVESTIGATION OF THE CROSSOVER BEHAVIOR
复制标题
离子流体中的关键现象：交叉行为的系统研究
DOI：
--
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
K. Pitzer
中科院分区：
文献类型：
--
作者：
T. Narayanan;K. Pitzer
报道了一系列离子液体的浊度临界行为。离子液体是由低熔点的有机盐在有机溶剂中组成，临界温度(T_C)是指液-液共存。相分离主要由低介电常数(E)溶剂中的库仑相互作用和高介电常数(E)溶剂中的憎溶剂效应驱动。对于中等库仑的情况，从浊度得到的渗透可压缩性和关联长度的临界指数(分别为γ和ν)在远离T_c时表现出从它们的Ising到平均场的交叉。当溶剂的有效e减小时，交叉区向T_c移动。对于疏溶剂的情况，浊度的临界行为可以用没有标度修正项的伊辛临界指数来充分描述。此外，还介绍了这类离子液体的几个特点。一些潜在的因素……
The critical behavior of turbidity for an array of ionic fluids is reported. The ionic fluid is comprised of a low melting organic salt in an organic solvent, and the critical temperature (Tc) refers to the liquid–liquid coexistence. The phase separation is driven, predominantly, by Coulombic interactions in the low dielectric constant (e) solvents and, primarily, by solvophobic effects in the high e solvents. For the moderately Coulombic case, the critical exponents of osmotic compressibility and correlation length (γ and ν, respectively), which are deduced from turbidity, exhibit a crossover from their Ising to mean‐field values when moved away from the Tc. The crossover region moves closer to Tc as the effective e of the solvent is decreased. For the solvophobic case, the critical behavior of turbidity can be adequately described by Ising critical exponents without correction‐to‐scaling terms. In addition, several specific features of this class of ionic fluids are presented. Some potential factors tha...