ArticleRSC advances2026
Rose Bengal-derived pH-sensitive carbon quantum dots for the detection of urea and urease activity.
Article in RSC advances, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
In this work, rose Bengal-derived carbon quantum dots (S-CQDs) were prepared by a one-step solvothermal method in ethanol using rose Bengal and 2-aminothiophenol as raw materials. The morphological properties, surface functional group information, elemental composition and optical properties of S-CQDs were carefully characterized by TEM, FTIR spectroscopy, XPS and fluorescence spectroscopy. The as-prepared S-CQDs dispersed well in water with a particle size of 1.74 ± 0.06 nm and exhibited excitation-independent yellow-green fluorescence emission (529 nm) with a high quantum yield (55.4%) and excellent salt tolerance and photostability. Importantly, S-CQDs were sensitive to pH and displayed significant fluorescence enhancement with increased pH values from 4.0 to 6.0. Based on this, a fluorescent strategy for the detection of urea and urease activity was developed with linear ranges of 0-4.0 mM and 0-100 mU mL
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