eprintid: 9824
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/98/24
datestamp: 2023-11-09 16:36:28
lastmod: 2023-11-09 16:36:28
status_changed: 2023-11-09 16:29:55
type: article
metadata_visibility: show
creators_name: Sardar, S.
creators_name: Wilfred, C.D.
creators_name: Mumtaz, A.
creators_name: Leveque, J.-M.
creators_name: Khan, A.S.
creators_name: Krishnan, S.
title: Physicochemical properties, Brönsted acidity and ecotoxicity of imidazolium-based organic salts: Non-toxic variants of protic ionic liquids
ispublished: pub
keywords: Escherichia coli; Ionic liquids; Positive ions; Refractive index; Thermal expansion; Toxicity; Viscosity, Alkyl chain lengths; Anti-microbial activity; Camphorsulphonate; Hammett acidities; Imidazolium; Physicochemical property, Acidity
note: cited By 17
abstract: In this study, four new protic ionic liquids (PILs), possessing camphorsulfonate anion with four different cations, 2-methyl-3-(3-sulfopropyl)-imidazolium (7,7-dimethyl-2-oxobicyclo2.2.1heptan-1-yl)methanesulfonate 2MeimPSCS, 2-ethyl-3-(3-sulfopropyl)-imidazolium (7,7-dimethyl-2-oxobicyclo2.2.1heptan-1-yl)methanesulfonate 2EteimPSCS, 2-phenyl-3-(3-sulfopropyl)-imidazolium (7,7-dimethyl-2-oxobicyclo2.2.1heptan-1-yl)methanesulfonate 2PhimPSCS and 3-(3-sulfopropyl)-benzimidazolium (7,7-dimethyl-2-oxobicyclo2.2.1heptan-1-yl)methanesulfonate BnzimPSCS were synthesized and characterized. The effect of alkyl and aromatic substitution on the imidazolium cation was investigated in terms of fluctuations in density, viscosity and thermal degradation of ILs. The density and viscosity were determined within a broad temperature range and measured values of density were used to calculate molar volume, standard molar entropy, lattice energy and thermal expansion coefficients. The refractive indices were measured with an ATAGO refractrometer (RX-5000a) within the temperature range of 288.15�333.15 K. The studied ILs exhibited strong Brönsted acidities as determined by Hammett method. Three human pathogenic bacteria i.e. Escherichia coli E149 (EC), Staphlylococcus aureus S244 (SA) and Aeromonas hydrophilla A97 (AH), were deployed to investigate the toxicity behaviour of studied ILs and their 50% effective concentrations (EC50) were found in comparison with the least toxic imidazolium-based ILs. COSMO-RS was used to determine δ-surface, δ-potential and δ-profile of the investigated ILs. © 2018
date: 2018
publisher: Elsevier B.V.
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85051386566&doi=10.1016%2fj.molliq.2018.08.017&partnerID=40&md5=dc7968e9b99397f4db0d72e206f32522
id_number: 10.1016/j.molliq.2018.08.017
full_text_status: none
publication: Journal of Molecular Liquids
volume: 269
pagerange: 178-186
refereed: TRUE
issn: 01677322
citation:   Sardar, S. and Wilfred, C.D. and Mumtaz, A. and Leveque, J.-M. and Khan, A.S. and Krishnan, S.  (2018) Physicochemical properties, Brönsted acidity and ecotoxicity of imidazolium-based organic salts: Non-toxic variants of protic ionic liquids.  Journal of Molecular Liquids, 269.  pp. 178-186.  ISSN 01677322