Kinetics of superoxide ion in dimethyl sulfoxide containing ionic liquids
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...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer Verlag (Germany)
2015
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/14014/1/Kinetics_of_superoxide_ion_in_dimethyl_sulfoxide_containing_ionic.pdf http://eprints.um.edu.my/14014/ http://link.springer.com/article/10.1007%2Fs11581-014-1224-y |
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| Summary: | 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. |
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