Photoelectrochemical oxidation of a turn-on fluorescent probe mediated by a surface MnII catalyst covalently attached to TiO2 nanoparticles
| Autor: | Hee Eun Song, Christian F. A. Negre, Matthieu Koepf, Gonghu Li, Robert H. Crabtree, Alec C. Durrell, Victor S. Batista, Karin J. Young, William R. McNamara, Gary W. Brudvig, Laura J. Allen |
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| Rok vydání: | 2014 |
| Předmět: |
Photocurrent
Photoelectrochemical oxidation 010405 organic chemistry Chemistry Inorganic chemistry Substrate (chemistry) Quantum yield 010402 general chemistry Photochemistry 7. Clean energy 01 natural sciences Fluorescence Catalysis 0104 chemical sciences Anode Electrode Physical and Theoretical Chemistry |
| Zdroj: | Journal of Catalysis. 310:37-44 |
| ISSN: | 0021-9517 |
| DOI: | 10.1016/j.jcat.2013.07.001 |
| Popis: | A manganese complex covalently attached to a TiO2 electrode via a light-absorbing organic linker (L) was used in the photooxidation of 2′,7′-dihydrodichlorofluorescein (H2DCF). Significant and sustained photocurrent was observed upon visible-light illumination of the fully assembled anode in the presence of the substrate. The two-electron, two-proton oxidation of H2DCF yields the fluorescent compound, 2′,7′-dichlorofluorescein (DCF). Our studies suggest that the MnII–L–TiO2 architecture is an effective photoanode for multielectron chemistry, as production of DCF under visible-light illumination exceeds yields observed for bare TiO2 as well as ZnII–L–TiO2 anodes. The turn-on fluorescent behavior of H2DCF upon oxidation makes it an excellent substrate for the study of new photoanodes. The high fluorescence quantum yield of DCF allows for nanomolar sensitivity and real-time monitoring of substrate oxidation. |
| Databáze: | OpenAIRE |
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