relation: https://khub.utp.edu.my/scholars/9824/
title: Physicochemical properties, Brönsted acidity and ecotoxicity of imidazolium-based organic salts: Non-toxic variants of protic ionic liquids
creator: Sardar, S.
creator: Wilfred, C.D.
creator: Mumtaz, A.
creator: Leveque, J.-M.
creator: Khan, A.S.
creator: Krishnan, S.
description: 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
publisher: Elsevier B.V.
date: 2018
type: Article
type: PeerReviewed
identifier:   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     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85051386566&doi=10.1016%2fj.molliq.2018.08.017&partnerID=40&md5=dc7968e9b99397f4db0d72e206f32522
relation: 10.1016/j.molliq.2018.08.017
identifier: 10.1016/j.molliq.2018.08.017