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Impact of aminated carbon quantum dots as a novel co-reactant for Ru(bpy): resolving specific electrochemiluminescence for butein detection

Analytical and Bioanalytical Chemistry, ISSN: 1618-2650, Vol: 412, Issue: 3, Page: 539-546
2020
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Article Description

Development of novel nanomaterial-based co-reactant is highly desired for enhancing ECL intensity and widespread analytical applications. Herein, we report the distinct role of amine-functionalized carbon quantum dots (f-CQDs) as a co-reactant, for the first time, augmenting the ECL property of Ru(bpy) and demonstrating for biopharmaceutical (butein) detection. Unlike conventional co-reactants like tripropylamine (TPrA), 2-(dibutylamino)ethanol (DBAE), and pristine CQDs, the f-CQDs as a co-reactant yield superior ECL of Ru(bpy). More importantly, the ECL intensity is independent of types of noble metals, metal oxide surfaces, and dissolved oxygen. Notably, the ECL intensity of Ru(bpy)–f-CQDs is linearly quenched with an increased concentration of butein, whereas no changes were observed with conventional co-reactants. ECL functionality of Ru(bpy)–f-CQDs has no interference with other similar phytochemicals and antioxidants. Enhanced selectivity is observed due to the formation of polyaminoquinone-like structures, which is confirmed by in situ spectroelectrochemical (UV–vis) and FT-IR studies. The present result envisaged that f-CQDs could be an alternative co-reactant for TPrA/DBAE, raising the ECL of Ru(bpy) suitable for analytical studies. [Figure not available: see fulltext.]

Bibliographic Details

Kalaiyarasan, Gopi; Raju, Chikkili Venkateswara; Veerapandian, Murugan; Kumar, Shanmugam Senthil; Joseph, James

Springer Science and Business Media LLC

Chemistry; Biochemistry, Genetics and Molecular Biology

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