Electrochemical Properties of a Verdazyl Radical in Room Temperature Ionic Liquids
© 2020 CSIRO. Room temperature ionic liquids (RTILs) have been widely investigated as alternative electrochemical solvents for a range of dissolved species over the past two decades. However, the behaviour of neutral radicals dissolved in RTILs is relatively unexplored. In this work, the electro...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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2020
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| Online Access: | http://purl.org/au-research/grants/arc/FT170100315 http://hdl.handle.net/20.500.11937/79833 |
| _version_ | 1848764113430249472 |
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| author | Lee, Juni Caporale, Chiara McKinley, A.J. Fuller, Rebecca Silvester-Dean, Debbie |
| author_facet | Lee, Juni Caporale, Chiara McKinley, A.J. Fuller, Rebecca Silvester-Dean, Debbie |
| author_sort | Lee, Juni |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2020 CSIRO.
Room temperature ionic liquids (RTILs) have been widely investigated as alternative electrochemical solvents for a range of dissolved species over the past two decades. However, the behaviour of neutral radicals dissolved in RTILs is relatively unexplored. In this work, the electrochemistry of a stable verdazyl radical-1,5-dimethyl-3-phenyl-6-oxoverdazyl (MPV)-has been studied on a platinum thin-film electrode using cyclic voltammetry and chronoamperometry in 10 different RTILs. The organic solvent propylene carbonate is also employed as a comparison. The nature of the solvent system was found to have a large effect on the electrochemical behaviour, particularly on the reduction reaction of the verdazyl radical. Chronoamperometry on a microdisk electrode was used to calculate diffusion coefficients (D), and plots of D versus the inverse of viscosity were linear, suggesting typical hydrodynamic diffusional characteristics of the radical, in line with the behaviour of dissolved neutral and charged compounds (e.g. ferrocene and cobaltocenium) in RTILs. Overall, this study demonstrates that different RTILs have a significant influence on the electrochemistry of MPV, and therefore careful selection of the solvent system for electrochemical applications is advised. |
| first_indexed | 2025-11-14T11:14:12Z |
| format | Journal Article |
| id | curtin-20.500.11937-79833 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:14:12Z |
| publishDate | 2020 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-798332021-01-08T07:54:28Z Electrochemical Properties of a Verdazyl Radical in Room Temperature Ionic Liquids Lee, Juni Caporale, Chiara McKinley, A.J. Fuller, Rebecca Silvester-Dean, Debbie © 2020 CSIRO. Room temperature ionic liquids (RTILs) have been widely investigated as alternative electrochemical solvents for a range of dissolved species over the past two decades. However, the behaviour of neutral radicals dissolved in RTILs is relatively unexplored. In this work, the electrochemistry of a stable verdazyl radical-1,5-dimethyl-3-phenyl-6-oxoverdazyl (MPV)-has been studied on a platinum thin-film electrode using cyclic voltammetry and chronoamperometry in 10 different RTILs. The organic solvent propylene carbonate is also employed as a comparison. The nature of the solvent system was found to have a large effect on the electrochemical behaviour, particularly on the reduction reaction of the verdazyl radical. Chronoamperometry on a microdisk electrode was used to calculate diffusion coefficients (D), and plots of D versus the inverse of viscosity were linear, suggesting typical hydrodynamic diffusional characteristics of the radical, in line with the behaviour of dissolved neutral and charged compounds (e.g. ferrocene and cobaltocenium) in RTILs. Overall, this study demonstrates that different RTILs have a significant influence on the electrochemistry of MPV, and therefore careful selection of the solvent system for electrochemical applications is advised. 2020 Journal Article http://hdl.handle.net/20.500.11937/79833 10.1071/CH19575 http://purl.org/au-research/grants/arc/FT170100315 http://purl.org/au-research/grants/arc/DE180100112 http://creativecommons.org/licenses/by/4.0/ fulltext |
| spellingShingle | Lee, Juni Caporale, Chiara McKinley, A.J. Fuller, Rebecca Silvester-Dean, Debbie Electrochemical Properties of a Verdazyl Radical in Room Temperature Ionic Liquids |
| title | Electrochemical Properties of a Verdazyl Radical in Room Temperature Ionic Liquids |
| title_full | Electrochemical Properties of a Verdazyl Radical in Room Temperature Ionic Liquids |
| title_fullStr | Electrochemical Properties of a Verdazyl Radical in Room Temperature Ionic Liquids |
| title_full_unstemmed | Electrochemical Properties of a Verdazyl Radical in Room Temperature Ionic Liquids |
| title_short | Electrochemical Properties of a Verdazyl Radical in Room Temperature Ionic Liquids |
| title_sort | electrochemical properties of a verdazyl radical in room temperature ionic liquids |
| url | http://purl.org/au-research/grants/arc/FT170100315 http://purl.org/au-research/grants/arc/FT170100315 http://hdl.handle.net/20.500.11937/79833 |