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

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abstract

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.

keywords

PHYSICAL-PROPERTIES; ALKYL SUBSTITUENTS; REFRACTIVE-INDEX; CHAIN-LENGTH; SIDE-CHAINS; TEMPERATURE; ANION; TENSION; WATER; CYTOTOXICITY

subject category

Thermodynamics; Chemistry

authors

Vieira, NSM; Luis, A; Reis, PM; Carvalho, PJ; Lopes-da-Silva, JA; Esperanca, JMSS; Araujo, JMM; Rebelo, LPN; Freire, MG; Pereiro, AB

our authors

foto Andreia Veríssimo Luís

Andreia Veríssimo Luís

Research Fellowship
foto Mara Guadalupe Freire Martins

Mara Guadalupe Freire Martins

Coordinating Researcher
foto Pedro J. Carvalho

Pedro J. Carvalho

Assistant Professor

Groups

G4 - Renewable Materials and Circular Economy
G5 - Biomimetic, Biological and Living Materials

Projects

Development of New Oxygen Therapeutics using Fluorinated Ionic Liquids (PTDC/EQU-FTT/118800/2010)

CICECO - Aveiro Institute of Materials (UID/CTM/50011/2013)

Igy Technology: A Purication Platform using Ionic-Liquid-Based Aqueous Biphasic Systems (IGYPURTECH)

acknowledgements

The authors wish to thank M. M. Pineiro from University of Vigo for his contribution to this work and Fundacao para a Ciencia e a Tecnologia (FCT/MCTES - Ministerio da Ciencia, Tecnologia e Ensino Superior, Portugal) for financial support through Grants SFRH/BD/100563/2014 and SFRH/BPD/82264/2011, (N.S.M.V. and P.J.C), contracts under Investigator FCT 2014 (A.B.P. and J.M.M.A.) and 2012 (J.M.S.S.E), and through projects PTDC/EQU-FTT/118800/2010, PTDC/CTM-NAN/121274/2010, IF/00210/2014/CP1244/CT0003, UID/Multi/04551/2013 and UID/CTM/50011/2013. M.G. Freire acknowledges the European Research Council (ERC) for the Starting Grant ERC-2013-StG-337753. The NMR spectrometers are part of The National NMR Facility, supported by FCT/MEC (RECI/BBB-BQB/0230/2012).

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Publication Details

type
Journal Article
year
2016
journal
JOURNAL OF CHEMICAL THERMODYNAMICS
volume
97
publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
issn
0021-9614
digital object identifier
10.1016/j.jct.2016.02.013
web of science article identifier
WOS:000373488800044

Journal Metrics (JCR 2019)

Journal Impact Factor
2.888
Journal Impact Factor (5 yrs)
2.5
category normalized journal percentile
64.563

Citations

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