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Thermophysical properties of trioctylalkylammonium bis(salicylato)borate ionic liquids: Effect of alkyl chain length
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering. Chemical Science Division, CSIR-Indian Institute of Petroleum, Dehradun.ORCID iD: 0000-0002-7340-7237
Department of Chemistry, Indian Institute of Technology Madras, Chennai.
Chemical Science Division, CSIR-Indian Institute of Petroleum, Dehradun.
Department of Chemistry, Indian Institute of Technology Madras, Chennai.
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2018 (English)In: Journal of Molecular Liquids, ISSN 0167-7322, E-ISSN 1873-3166, Vol. 269, p. 540-546Article in journal (Refereed) Published
Abstract [en]

Thermophysical properties of halogen-free ionic liquids are gaining significant attention for industrial applications. In this context, trioctylalkylammonium bis(salicylato)borate (N888n-BScB) ionic liquids having variable alkyl chain length (n = 4, 8, 12, 16) are synthesized to explore the effect of chain length and temperature on their physicochemical properties. The density (ρ), refractive index (nD), and speed of sound (u) are measured in the temperature range of 293.15 to 333.15 K. The tetraoctylammonium-BScB is found to be highly dense ionic liquid, and it was attributed to the closer packing of symmetric structure of tetraoctylammonium cation. Furthermore, derived thermodynamic properties such as isentropic compressibility (βs), coefficient of thermal expansion (α), standard entropy (S°), intermolecular free length (Lf) and lattice energy (UPOT) are calculated for the N888n-BScB ionic liquids using the experimental data and shown the effect of variable chain length. This study provides a comprehensive insight on the thermophysical properties of halogen-free ionic liquids.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 269, p. 540-546
National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-70616DOI: 10.1016/j.molliq.2018.08.083ISI: 000447482500058Scopus ID: 2-s2.0-85051632936OAI: oai:DiVA.org:ltu-70616DiVA, id: diva2:1242385
Note

Validerad;2018;Nivå 2;2018-08-28 (andbra)

Available from: 2018-08-28 Created: 2018-08-28 Last updated: 2018-11-01Bibliographically approved

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