Fluorination effects on the thermodynamic, thermophysical and surface properties of ionic liquids

被引：32

作者：

Vieira, N. S. M. ^{[1
]}

Luis, A. ^{[2
]}

Reis, P. M. ^{[1
]}

Carvalho, P. J. ^{[2
]}

Lopes-da-Silva, J. A. ^{[3
]}

Esperanca, J. M. S. S. ^{[1
]}

Araujo, J. M. M. ^{[1
]}

Rebelo, L. P. N. ^{[1
]}

Freire, M. G. ^{[2
]}

Pereiro, A. B. ^{[1
]}

机构：

[1] Univ Nova Lisboa, Inst Tecnol Quim & Biol Antonio Xavier, P-2780157 Oeiras, Portugal

[2] Univ Aveiro, CICECO Aveiro Inst Mat, Dept Chem, P-3810193 Aveiro, Portugal

[3] Univ Aveiro, Dept Chem, QOPNA Unit, P-3810193 Aveiro, Portugal

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2016年 / 97卷

基金：

欧洲研究理事会;

关键词：

Fluorinated ionic liquids; Surface tension; Physical and thermal properties; Thermodynamic functions; Walden plot; PHYSICAL-PROPERTIES; ALKYL SUBSTITUENTS; REFRACTIVE-INDEX; CHAIN-LENGTH; TEMPERATURE; TENSION; ANION; CYTOTOXICITY; IMIDAZOLIUM; SOLUBILITY;

D O I：

10.1016/j.jct.2016.02.013

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper reports the thermal, thermodynamic, thermophysical and surface properties of eight ionic liquids with fluorinated alkyl side chain lengths equal or greater than four carbon atoms. Melting and decomposition temperatures were determined together with experimental densities, surface tensions, refractive indices, dynamic viscosities and ionic conductivities in a temperature interval ranging from (293.15 to 353.15) K. The surface properties of these fluorinated ionic liquids were discussed and several thermodynamic functions, as well as critical temperatures, were estimated. Coefficients of isobaric thermal expansion, molecular volumes and free volume effects were calculated from experimental values of density and refractive index and compared with previous data. Finally, Walden plots were used to evaluate the ionicity of the investigated ionic liquids. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：354 / 361

页数：8

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