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Characterization of a Ruthenium(II) Complex in Singlet Oxygen-Mediated Photoelectrochemical Sensing
[Image: see text] A water-soluble ruthenium(II) complex (L), capable of producing singlet oxygen ((1)O(2)) when irradiated with visible light, was used to modify the surface of an indium–tin oxide (ITO) electrode decorated with a nanostructured layer of TiO(2) (TiO(2)/ITO). Singlet oxygen triggers t...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9835978/ https://www.ncbi.nlm.nih.gov/pubmed/36574357 http://dx.doi.org/10.1021/acs.langmuir.2c03042 |
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author | Verrucchi, Margherita Giacomazzo, Gina Elena Sfragano, Patrick Severin Laschi, Serena Conti, Luca Pagliai, Marco Gellini, Cristina Ricci, Marilena Ravera, Enrico Valtancoli, Barbara Giorgi, Claudia Palchetti, Ilaria |
author_facet | Verrucchi, Margherita Giacomazzo, Gina Elena Sfragano, Patrick Severin Laschi, Serena Conti, Luca Pagliai, Marco Gellini, Cristina Ricci, Marilena Ravera, Enrico Valtancoli, Barbara Giorgi, Claudia Palchetti, Ilaria |
author_sort | Verrucchi, Margherita |
collection | PubMed |
description | [Image: see text] A water-soluble ruthenium(II) complex (L), capable of producing singlet oxygen ((1)O(2)) when irradiated with visible light, was used to modify the surface of an indium–tin oxide (ITO) electrode decorated with a nanostructured layer of TiO(2) (TiO(2)/ITO). Singlet oxygen triggers the appearance of a cathodic photocurrent when the electrode is illuminated and biased at a proper reduction potential value. The L/TiO(2)/ITO electrode was first characterized with cyclic voltammetry, impedance spectroscopy, NMR, and Raman spectroscopy. The rate constant of singlet oxygen production was evaluated by spectrophotometric measurements. Taking advantage of the oxidative process initiated by (1)O(2), the analysis of phenolic compounds was accomplished. Particularly, the (1)O(2)-driven oxidation of hydroquinone (HQ) produced quinone moieties, which could be reduced back at the electrode surface, biased at −0.3 V vs Ag/AgCl. Such a light-actuated redox cycle produced a photocurrent dependent on the concentration of HQ in solution, exhibiting a limit of detection (LOD) of 0.3 μmol dm(–3). The L/TiO(2)/ITO platform was also evaluated for the analysis of p-aminophenol, a commonly used reagent in affinity sensing based on alkaline phosphatase. |
format | Online Article Text |
id | pubmed-9835978 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-98359782023-01-13 Characterization of a Ruthenium(II) Complex in Singlet Oxygen-Mediated Photoelectrochemical Sensing Verrucchi, Margherita Giacomazzo, Gina Elena Sfragano, Patrick Severin Laschi, Serena Conti, Luca Pagliai, Marco Gellini, Cristina Ricci, Marilena Ravera, Enrico Valtancoli, Barbara Giorgi, Claudia Palchetti, Ilaria Langmuir [Image: see text] A water-soluble ruthenium(II) complex (L), capable of producing singlet oxygen ((1)O(2)) when irradiated with visible light, was used to modify the surface of an indium–tin oxide (ITO) electrode decorated with a nanostructured layer of TiO(2) (TiO(2)/ITO). Singlet oxygen triggers the appearance of a cathodic photocurrent when the electrode is illuminated and biased at a proper reduction potential value. The L/TiO(2)/ITO electrode was first characterized with cyclic voltammetry, impedance spectroscopy, NMR, and Raman spectroscopy. The rate constant of singlet oxygen production was evaluated by spectrophotometric measurements. Taking advantage of the oxidative process initiated by (1)O(2), the analysis of phenolic compounds was accomplished. Particularly, the (1)O(2)-driven oxidation of hydroquinone (HQ) produced quinone moieties, which could be reduced back at the electrode surface, biased at −0.3 V vs Ag/AgCl. Such a light-actuated redox cycle produced a photocurrent dependent on the concentration of HQ in solution, exhibiting a limit of detection (LOD) of 0.3 μmol dm(–3). The L/TiO(2)/ITO platform was also evaluated for the analysis of p-aminophenol, a commonly used reagent in affinity sensing based on alkaline phosphatase. American Chemical Society 2022-12-27 /pmc/articles/PMC9835978/ /pubmed/36574357 http://dx.doi.org/10.1021/acs.langmuir.2c03042 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Verrucchi, Margherita Giacomazzo, Gina Elena Sfragano, Patrick Severin Laschi, Serena Conti, Luca Pagliai, Marco Gellini, Cristina Ricci, Marilena Ravera, Enrico Valtancoli, Barbara Giorgi, Claudia Palchetti, Ilaria Characterization of a Ruthenium(II) Complex in Singlet Oxygen-Mediated Photoelectrochemical Sensing |
title | Characterization
of a Ruthenium(II) Complex in Singlet
Oxygen-Mediated Photoelectrochemical Sensing |
title_full | Characterization
of a Ruthenium(II) Complex in Singlet
Oxygen-Mediated Photoelectrochemical Sensing |
title_fullStr | Characterization
of a Ruthenium(II) Complex in Singlet
Oxygen-Mediated Photoelectrochemical Sensing |
title_full_unstemmed | Characterization
of a Ruthenium(II) Complex in Singlet
Oxygen-Mediated Photoelectrochemical Sensing |
title_short | Characterization
of a Ruthenium(II) Complex in Singlet
Oxygen-Mediated Photoelectrochemical Sensing |
title_sort | characterization
of a ruthenium(ii) complex in singlet
oxygen-mediated photoelectrochemical sensing |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9835978/ https://www.ncbi.nlm.nih.gov/pubmed/36574357 http://dx.doi.org/10.1021/acs.langmuir.2c03042 |
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