Fluorescence Quenching of Dyes by Graphene Oxide
| Autor: | Vadim V. Shmanai, D. L. Yakovlev, V. I. Stepuro, Dmitry A. Tsybulsky, V. A. Povedailo, B. V. Ronishenko |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Xanthene Materials science Quenching (fluorescence) Graphene Oxide Analytical chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention Rhodamine Colloid chemistry.chemical_compound chemistry law Rhodamine B 0210 nano-technology Spectroscopy Alkyl |
| Zdroj: | Journal of Applied Spectroscopy. 85:605-610 |
| ISSN: | 1573-8647 0021-9037 |
| DOI: | 10.1007/s10812-018-0693-6 |
| Popis: | Fluorescence quenching of four dyes [acridine orange (AO), rhodamine B (Rd B), rhodamine 110 (Rd 110), and rhodamine 640 (Rd 640)] by colloidal graphene oxide (GO) in phosphate buffer (pH 6.0) was studied. Dynamic and static quenching were analyzed using the Stern–Volmer equation. Static quenching by graphene oxide was observed for AO, Rd 640, and Rd B whereas mixed dynamic and static quenching was characteristic of Rd 110. The Stern–Volmer constant of dynamic quenching was 10 times less than that of static quenching. The measured association constants of the dyes with GO fell in the order 2540 (AO) > 495 (Rd 640) > 260 (Rd 110) > 144 L/g (Rd B). The value of the π–π-stacking interaction was strongly influenced by the phthalic fragment oriented perpendicular to the xanthene in the rhodamine dyes and the four alkyl groups of Rd B as a result of their torsional vibrations and rotational motions. |
| Databáze: | OpenAIRE |
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