Transport properties of nitrile and carbonate solutions of [P66614][NTf2] ionic liquid, its thermal degradation and non-isothermal kinetics of decomposition

被引：1

作者：

Arkhipova, Ekaterina A. ^{[1
]}

Ivanov, Anton S. ^{[1
]}

Reshetko, Sergei S. ^{[1
]}

Aleshin, Dmitry Yu ^{[2
]}

Maslakov, Konstantin, I ^{[1
]}

Kupreenko, Stepan Yu ^{[1
]}

Savilov, Serguei, V ^{[1
]}

机构：

[1] Lomonosov Moscow State Univ, Dept Chem, 1-3 Leninskiye Gory, Moscow 119991, Russia

[2] Russian Acad Sci, AN Nesmeyanov Inst Organoelement Cpds, Vavilov Str 28, Moscow 119991, Russia

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2021年 / 23卷 / 41期

基金：

俄罗斯基础研究基金会;

关键词：

ALKYL CHAIN-LENGTH; PHYSICOCHEMICAL PROPERTIES; ELECTRICAL-CONDUCTIVITY; GAMMA-BUTYROLACTONE; EXCESS PROPERTIES; ORGANIC-SOLVENTS; VISCOSITY; ELECTROLYTES; MIXTURES; DENSITY;

D O I：

10.1039/d1cp03549e

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrical conductivity, density and diffusion coefficients of trihexyl(tetradecyl)phosphonium bis(trifluoromethylsulfonyl)amide ([P66614][NTf2]) ionic liquid and its binary solutions in acetonitrile, propionitrile, dimethyl and diethyl carbonates were measured in the temperature range of 293-348 K. The electrical conductivity - ionic liquid mole fraction dependencies for the binary solutions were fitted with the empirical Casteel-Amis equation. The temperature dependencies of electrical conductivity were analyzed using the Arrhenius, Litovitz and Vogel-Fulcher-Tammann approaches. The dependences of the Arrhenius activation energy and pre-exponential factor on the mole fraction of ionic liquid in the solutions were fitted with the empirical equations proposed in the literature. The thermo-gravimetric analysis combined with mass spectrometry demonstrated the high thermal stability of [P66614][NTf2] up to 600 K. At higher temperatures the decomposition of [P66614][NTf2] proceeded via the elimination of alkyl radicals as a result of the nucleophilic attack of reactive intermediates to the [P66614](+) cation with the formation of trialkylphosphines. The activation energies of the thermal destruction of [P66614][NTf2] were calculated using the Kissinger equation and non-linear integral isoconversional model.

引用

页码：23909 / 23921

页数：13