Electrochemistry of dopamine at the polarised liquid|liquid interface facilitated by an homo-oxo-calix[3]arene ionophore
The homo-oxo-calix[3]arene-facilitated electrochemistry of dopamine at the polarised liquid|liquid interface is presented. Cyclic voltammetry indicated that the dopamine: homo-oxo-calix[3]arene complex formed at the interface between water and 1,2-dichloroethane had a 1:2 stoichiometry, which was co...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier
2008
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| Online Access: | http://hdl.handle.net/20.500.11937/23170 |
| _version_ | 1848751075651223552 |
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| author | Herzog, G. McMahon, B. Lefoix, M. Mullins, N. Collins, C. Moynihan, H. Moynihan, H. Arrigan, Damien |
| author_facet | Herzog, G. McMahon, B. Lefoix, M. Mullins, N. Collins, C. Moynihan, H. Moynihan, H. Arrigan, Damien |
| author_sort | Herzog, G. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The homo-oxo-calix[3]arene-facilitated electrochemistry of dopamine at the polarised liquid|liquid interface is presented. Cyclic voltammetry indicated that the dopamine: homo-oxo-calix[3]arene complex formed at the interface between water and 1,2-dichloroethane had a 1:2 stoichiometry, which was confirmed by 1H NMR titration. The electrochemically-determined association constants for the homo-oxocalix[ 3]arene complexes with dopamine (log b 8.3), Na+ (8.0) and K+ (7.5) showed that the ionophore was more selective for dopamine over the two alkali metal cations than the dibenzo-18-crown-6 ionophore. Square wave voltammetry was employed for assessment of low concentration measurements, with a limit of detection of 3.8 lM dopamine achieved. These results show that oxo-calixarene-based ionophores are useful reagents for the detection of dopamine at the interface between two immiscible electrolyte solutions. |
| first_indexed | 2025-11-14T07:46:58Z |
| format | Journal Article |
| id | curtin-20.500.11937-23170 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:46:58Z |
| publishDate | 2008 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-231702017-02-28T01:37:22Z Electrochemistry of dopamine at the polarised liquid|liquid interface facilitated by an homo-oxo-calix[3]arene ionophore Herzog, G. McMahon, B. Lefoix, M. Mullins, N. Collins, C. Moynihan, H. Moynihan, H. Arrigan, Damien The homo-oxo-calix[3]arene-facilitated electrochemistry of dopamine at the polarised liquid|liquid interface is presented. Cyclic voltammetry indicated that the dopamine: homo-oxo-calix[3]arene complex formed at the interface between water and 1,2-dichloroethane had a 1:2 stoichiometry, which was confirmed by 1H NMR titration. The electrochemically-determined association constants for the homo-oxocalix[ 3]arene complexes with dopamine (log b 8.3), Na+ (8.0) and K+ (7.5) showed that the ionophore was more selective for dopamine over the two alkali metal cations than the dibenzo-18-crown-6 ionophore. Square wave voltammetry was employed for assessment of low concentration measurements, with a limit of detection of 3.8 lM dopamine achieved. These results show that oxo-calixarene-based ionophores are useful reagents for the detection of dopamine at the interface between two immiscible electrolyte solutions. 2008 Journal Article http://hdl.handle.net/20.500.11937/23170 Elsevier restricted |
| spellingShingle | Herzog, G. McMahon, B. Lefoix, M. Mullins, N. Collins, C. Moynihan, H. Moynihan, H. Arrigan, Damien Electrochemistry of dopamine at the polarised liquid|liquid interface facilitated by an homo-oxo-calix[3]arene ionophore |
| title | Electrochemistry of dopamine at the polarised liquid|liquid interface facilitated by an homo-oxo-calix[3]arene ionophore |
| title_full | Electrochemistry of dopamine at the polarised liquid|liquid interface facilitated by an homo-oxo-calix[3]arene ionophore |
| title_fullStr | Electrochemistry of dopamine at the polarised liquid|liquid interface facilitated by an homo-oxo-calix[3]arene ionophore |
| title_full_unstemmed | Electrochemistry of dopamine at the polarised liquid|liquid interface facilitated by an homo-oxo-calix[3]arene ionophore |
| title_short | Electrochemistry of dopamine at the polarised liquid|liquid interface facilitated by an homo-oxo-calix[3]arene ionophore |
| title_sort | electrochemistry of dopamine at the polarised liquid|liquid interface facilitated by an homo-oxo-calix[3]arene ionophore |
| url | http://hdl.handle.net/20.500.11937/23170 |