ArticleMaterials (Basel, Switzerland)2020
Reversible Aggregation of Molecular-Like Fluorophores Driven by Extreme pH in Carbon Dots.
Article in Materials (Basel, Switzerland), 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Article
- Insights into tautomerism and pH effects on the photoluminescence of citric acid-derived molecular fluorophores.RSC advances · 2026Article
- Electron Irradiation Effects on N and FeInternational journal of nanomedicine · 2026Article
- Carbon Nanodots from an In Silico Perspective.Chemical reviews · 2022Review
- Normal breast epithelial MCF-10A cells to evaluate the safety of carbon dots.RSC medicinal chemistry · 2021Article
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Authors and funding
5 authors.
Funding
Abstract
The origin of carbon-dots (C-dots) fluorescence and its correlation with the dots structure still lack a comprehensive model. In particular, the core-shell model does not always fit with the experimental results, which, in some cases, suggest a molecular origin of the fluorescence. To gain a better insight, we have studied the response of molecular-like fluorophores contained in the C-dots at extreme pH conditions. Citric acid and urea have been employed to synthesize blue and green-emitting C-dots. They show a different emission as a function of the pH of the dispersing media. The photoluminescence has been attributed to molecular-like fluorophores: citrazinic acid and 4-hydroxy-1H-pyrrolo[3,4-c]-pyridine-1,3,6-(2H,5H)-trione. 3D and time-resolved photoluminescence, ultraviolet-visible (UV-vis) spectroscopy, and dynamic light scattering have been used to determine the aggregation state, quantum yield and emission properties of the C-dots. The dependence of the C-dots blue and green components on the chemical environment indicates that the origin of fluorescence is due to molecular-like fluorophores.
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