The electrochemistry of ubiquinone-10 in a phospholipid model membrane
The electrochemistry of ubiquinone-10, UQ, incorporated over a phospholipid layer adsorbed on a mercury drop electrode has been investigated over a wide pH range. It is shown that the position of the quinone headgroup in relation to the lipid determines the reversibility of the redox chemistry. For...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_13596640_v116_n_p89_Gordillo |
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todo:paper_13596640_v116_n_p89_Gordillo2023-10-03T16:10:39Z The electrochemistry of ubiquinone-10 in a phospholipid model membrane Gordillo, G.J. Schiffrin, D.J. phospholipid ubiquinone algorithm article artificial membrane chemistry electrochemistry oxidation reduction reaction pH Algorithms Electrochemistry Hydrogen-Ion Concentration Membranes, Artificial Oxidation-Reduction Phospholipids Ubiquinone The electrochemistry of ubiquinone-10, UQ, incorporated over a phospholipid layer adsorbed on a mercury drop electrode has been investigated over a wide pH range. It is shown that the position of the quinone headgroup in relation to the lipid determines the reversibility of the redox chemistry. For pH < 7, the reaction follows a disproportionation route involving the ubiquinone radical. There is evidence for the presence of a parallel reaction sequence. The bifurcation point appears to occur for the UQ molecule, which disproportionates after protonation and reduction, in parallel with direct electron transfer to yield the UQ:- radical anion. The incorporation of UQ in a lipid monolayer makes its reduction very irreversible for pH > 7. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_13596640_v116_n_p89_Gordillo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
phospholipid ubiquinone algorithm article artificial membrane chemistry electrochemistry oxidation reduction reaction pH Algorithms Electrochemistry Hydrogen-Ion Concentration Membranes, Artificial Oxidation-Reduction Phospholipids Ubiquinone |
| spellingShingle |
phospholipid ubiquinone algorithm article artificial membrane chemistry electrochemistry oxidation reduction reaction pH Algorithms Electrochemistry Hydrogen-Ion Concentration Membranes, Artificial Oxidation-Reduction Phospholipids Ubiquinone Gordillo, G.J. Schiffrin, D.J. The electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| topic_facet |
phospholipid ubiquinone algorithm article artificial membrane chemistry electrochemistry oxidation reduction reaction pH Algorithms Electrochemistry Hydrogen-Ion Concentration Membranes, Artificial Oxidation-Reduction Phospholipids Ubiquinone |
| description |
The electrochemistry of ubiquinone-10, UQ, incorporated over a phospholipid layer adsorbed on a mercury drop electrode has been investigated over a wide pH range. It is shown that the position of the quinone headgroup in relation to the lipid determines the reversibility of the redox chemistry. For pH < 7, the reaction follows a disproportionation route involving the ubiquinone radical. There is evidence for the presence of a parallel reaction sequence. The bifurcation point appears to occur for the UQ molecule, which disproportionates after protonation and reduction, in parallel with direct electron transfer to yield the UQ:- radical anion. The incorporation of UQ in a lipid monolayer makes its reduction very irreversible for pH > 7. |
| format |
JOUR |
| author |
Gordillo, G.J. Schiffrin, D.J. |
| author_facet |
Gordillo, G.J. Schiffrin, D.J. |
| author_sort |
Gordillo, G.J. |
| title |
The electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| title_short |
The electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| title_full |
The electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| title_fullStr |
The electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| title_full_unstemmed |
The electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| title_sort |
electrochemistry of ubiquinone-10 in a phospholipid model membrane |
| url |
http://hdl.handle.net/20.500.12110/paper_13596640_v116_n_p89_Gordillo |
| work_keys_str_mv |
AT gordillogj theelectrochemistryofubiquinone10inaphospholipidmodelmembrane AT schiffrindj theelectrochemistryofubiquinone10inaphospholipidmodelmembrane AT gordillogj electrochemistryofubiquinone10inaphospholipidmodelmembrane AT schiffrindj electrochemistryofubiquinone10inaphospholipidmodelmembrane |
| _version_ |
1807314611994624000 |