Kinetics of superoxide ion in dimethyl sulfoxide containing ionic liquids

Hayyan, M. and Hashim, M.A. and AlNashef, I.M. (2015) Kinetics of superoxide ion in dimethyl sulfoxide containing ionic liquids. Ionics, 21 (3). pp. 719-728. ISSN 0947-7047, DOI https://doi.org/10.1007/s11581-014-1224-y.

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Abstract

The chemical generation of superoxide ion (O-2 (aEuro cent a')) by dissolving potassium superoxide was investigated. The chemically generated O-2 (aEuro cent a') was then used to study the long-term stability of O-2 (aEuro cent a') in dimethyl sulfoxide (DMSO) containing ionic liquids (ILs) and determine the rate constants based on pseudo 1st- and 2nd-order reactions between the IL and O-2 (aEuro cent a') generated in DMSO. O-2 (aEuro cent a') was unstable in DMSO containing S-222TFSI, DMImMS, BDMImTfO, EMImTFSI, EMImMS, P-14,P-666TPTP, P-14,P-666TFSI, and all pyridinium-based ILs. In contrast, O-2 (aEuro cent a') was very stable in DMSO containing MOPMPipTFSI, BMPyrrDCA, BMPyrrTFSI, BMPyrrTfO, HMPyrrTFSI, MOEMPipTPTP, BMPyrrTFA, N-112,1O(2)TFSI, and MOEMMorTFSI. This shows that these ILs can be used for different applications involving O-2 (aEuro cent a'). The reaction rate constant, total consumption, and consumption rate of O-2 (aEuro cent a') were determined. The rate constants of O-2 (aEuro cent a') in some ILs were found to follow pseudo 1st-order reaction, while in others, pseudo 2nd-order reaction kinetics were observed.

Item Type:	Article
Funders:	University of Malaya HIR-MOHE D000003-16001 , University of Malaya Centre for Ionic Liquids (UMCiL) , Deanship of Scientific Research at King Saud University IRG14-13
Additional Information:	Cd2ba Times Cited:0 Cited References Count:53
Uncontrolled Keywords:	Superoxide ion; Ionic liquids; Oxygen reduction; Aprotic solvents; Reaction engineering; Potassium superoxide; Temperature molten-salt; Electrochemical reduction; Alkyl-halides; Stability; Generation; Oxygen; Solvents; Cation; Destruction; Extraction
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology
Divisions:	Faculty of Engineering
Depositing User:	Mr Jenal S
Date Deposited:	01 Sep 2015 08:06
Last Modified:	01 Sep 2015 08:06
URI:	http://eprints.um.edu.my/id/eprint/14014

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