A new fluorescent nitrogen-doped carbon dot system modified by the fluorophore-labeled ssDNA for the analysis of 6-mercaptopurine and Hg (II)

Herbal medicine derived carbon dots: synthesis and applications in therapeutics, bioimaging and sensing

“…Reaction temperature and time can affect the performance of HM-CDs. The hydrothermal reaction temperature of HM-CDs (such as CDs derived from papaya [ 78 ], yams [ 79 ], bamboo leaves [ 80 ]) was normally 100–200 ℃. Li et al [ 81 ] synthesized the nitrogen-doped CDs from ginkgo fruits (H-N-CDs) at different temperatures and times.…”

“…Li et al [ 79 ] used Chinese yams as a source of carbon and nitrogen to prepare water-soluble yam quantum dots and modified the surface with carboxyfluorescein (FAM)-DNA macro-molecules (NCDs-ssDNA) to promote strong π–π accumulation. When 6-mercaptopurine (6-MP) was added, it could form a large conjugated rigid plane structure with FAM-DNA, resulting in fluorescence enhancement.…”

Heavy metal ion detection using green precursor derived carbon dots

“…Zhuo Li et al. ( Li et al, 2015b ) synthesized nitrogen-doped CDs (size 2.7 ± 1.4 nm) using Chinese yams for the detection of Hg (II) in real water samples. It is reported that fluorescence intensity increases because of the addition of Hg (II) analyte and the formation of a hairpin structure.…”

Harnessing versatile dynamic carbon precursors for multi-color emissive carbon dots

“…Accordingly, the successful use of plant leaves indicated the possibility of exploring plant fruits for the synthesis of CDs. The natural precursors can be vegetables such as cabbage, 120 giving CDs with a blue emission and QY of 17.5%, chinese yam with blue emission at 420 nm and QY 9.3% 121 and onion 122 with blue emission at 464 nm and QY 28%. Even garlic with nitrogen and sulfur co-doped carbon dots (CDs) exhibited a blue emission at 442 nm with a QY of 17.5%, 123 that from fungus exhibited a blue emission at 455 nm with QY 15.3% (Fig.…”