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Coreactant-free strong Ru(bpy)32+ ECL at ionic liquid modified electrode and its application in sensitive detection of glucose based on resonance energy transfer.
- Source :
-
Talanta . Apr2024, Vol. 270, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
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Abstract
- In this work, we have realized the strong anodic ECL emission of Ru(bpy) 3 2+ at ionic liquid (N-butylpyridinium tetrafluoroborate) modified electrode without additional coreactant. Methylene blue (MB) could accept the energy of Ru(bpy) 3 2+ ECL to construct resonance energy transfer (ECL-RET) system, leading to the decrease of ECL signal. In the presence of glucose oxidase, hydrogen peroxide generated from the oxidation process of glucose could oxidize MB and block the ECL-RET route, resulting in the recovery of ECL signal. As a consequence, the designed sensor showed outstanding performance for "signal-on" detection of glucose in the concentration range of 10 μM to 1 mM, and the detection limit was determined as 1.75 μM. Importantly, this study revealed new roles of ILs in the fabrication of coreactant-free ECL sensing, which might open up a promising route for the potential design and implement in clinical analysis. Strong anodic Ru(bpy) 3 2+ ECL was obtained at ionic liquid modified electrode without coreactant. ECL resonance energy transfer between Ru(bpy) 3 2+ ECL and methylene blue could inhibit ECL signal. Hydrogen peroxide generated from glucose could oxidize methylene and block the energy transfer route, resulting in the recovery of ECL signal. As a result, an "off-on" mode ECL sensor for sensitive and selective detection of glucose was proposed. [Display omitted] • Coreactant-free Ru(bpy) 3 2+ ECL was obtained at ionic liquid modified electrode. • ECL-RET could occur between Ru(bpy) 3 2+ ECL and methylene blue. • The oxidation of methylene blue could block the ECL-RET process. • An ECL sensor was fabricated to sensitively detect glucose. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00399140
- Volume :
- 270
- Database :
- Academic Search Index
- Journal :
- Talanta
- Publication Type :
- Academic Journal
- Accession number :
- 174950699
- Full Text :
- https://doi.org/10.1016/j.talanta.2023.125584