Abstract
We report on the interaction of graphene quantum dots (GQDs) with 4-acetamido-2,2,6,6-tetramethylpiperidine-oxyl (4-acetamido-TEMPO) free radicals. The GQDs were N and S, N doped. The fluorescence quantum yields were higher for the doped GQDs compared to the undoped. The interaction is assessed by spectrofluorimetric, steady state/time resolved fluorescence and electron paramagnetic resonance (EPR) techniques. Fluorescence quenching was observed upon the addition of 4-acetamido-TEMPO to the GQDs. Photo-induced electron transfer (PET) mechanism was suggested as the plausible mechanism involved in the fluorescence quenching in which 4-acetamido-TEMPO acted as the electron acceptor.
| Original language | English |
|---|---|
| Pages (from-to) | 283-295 |
| Number of pages | 13 |
| Journal | Journal of Fluorescence |
| Volume | 26 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 9 Nov 2015 |
| Externally published | Yes |
Bibliographical note
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