title: RETRACTED: Neoteric FT-IR investigation on the functional groups of phosphonium-based deep eutectic solvents.
abstract: Deep eutectic solvents (DESs) are novel solvent media that are currently under investigation as an alternative to ionic liquids and conventional solvents. The physical properties of DESs as well as their mild environmental footprint and potentially critical industrial application necessitate understanding the interaction of functional groups on both the salt and hydrogen bond donor (HBD). In this study, four DESs were prepared by mixing triethylenglycol, diethylenglycol, ethylenglycol, and glycerol as HBDs with methyltriphenylphosphonium bromide as a salt at a molar ratio of 1:4. Fourier transform infrared spectroscopy was conducted to highlight the chemical structure and mechanism of the combination of the four DESs. New spectra illustrating the combination of the functional groups of the HBDs and salt were observed and interpreted. This study is the first to investigate the properties of neoteric phosphonium-based DESs.
authors.affiliation: Department of Chemical Engineering, University of Technology Petronas, 31750 Tronoh, Perak, Malaysia. Electronic address: t.aissaoui84@gmail.com.
authors.forename: Tayeb
authors.initials: T
authors.lastname: Aissaoui
authors.affiliation: Department of Chemical and Environmental Engineering, Masdar Institute of Science and Technology, Abu Dhabi, United Arab Emirates.
authors.forename: Inas M
authors.initials: IM
authors.lastname: AlNashef
authors.affiliation: Department of Civil Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia; University of Malaya Centre for Ionic Liquids (UMCiL), University of Malaya, Kuala Lumpur 50603, Malaysia.
authors.forename: Maan
authors.initials: M
authors.lastname: Hayyan
authors.affiliation: University of Malaya Centre for Ionic Liquids (UMCiL), University of Malaya, Kuala Lumpur 50603, Malaysia; Department of Chemical Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia.
authors.forename: Mohd Ali
authors.initials: MA
authors.lastname: Hashim