In this study,mango leaves were used as a carbon source to synthesize novel carbon quantum dots (CDs-M) through a simple hydrothermal method involving carbonization followed by dissolution with concentrated hydrochloric acid and H2O2.The fluorescence stability of CDs-M and their metal ion recognition capabilities were systematically investigated.The results demonstrated that the CDs-M solution exhibited excellent fluorescence stability in systems with varying pH values and over different storage durations.Notably,Cu2+ and Fe3+ induced significant fluorescence quenching of CDs-M,while other metal ions showed negligible effects.A linear relationship was observed between the fluorescence quenching intensity of CDs-M and the concentrations of Cu2+ and Fe3+,enabling the development of a novel fluorescent probe for detecting these ions.The detection limits were determined to be 38.2 nmol/L for Cu2+ and 14.4 nmol/L for Fe3+,indicating high sensitivity and low detection limits.This method not only provides a highly sensitive approach for Cu2+ and Fe3+ detection but also offers a sustainable strategy for the repurposing of mango leaf waste.
XueP, ZhuangH, ShaoS, et al. Biodegradable ionic nanoregulators for synchronous modulation of copper and iron ion homeostasis in breast cancer therapy[J]. Chemical Engineering Journal, 2025, 511:162041.
[2]
YangY S, WangL B, YangF, et al. A novel pyrazole-pyrazoline fluorescent probe for the detection of Cu2+ and Fe3+ in living cells[J]. Spectrochimica Acta Part A:Molecular and Biomolecular Spectroscopy, 2025, 329:125533.
[3]
LiuS, ChenX, QiX, et al. The role of metal ion metabolism in the pathogenesis of diabetes and associated complications[J]. Frontiers in Endocrinology, 2025, 16:1541809.
[4]
BisagliaM, BubaccoL. Copper ions and Parkinson’s disease:why is homeostasis so relevant?[J]. Biomolecules, 2020, 10(2):195.
[5]
ZhangB, BurkeR. Copper homeostasis and the ubiquitin proteasome system[J]. Metallomics, 2023, 15(3):mfad010.
[6]
CamaschellaC, PaganiA. Mendelian inheritance of anemia due to disturbed iron homeostasis[C]. Seminars in Hematology.WB Saunders, 2021, 58(3):175-181.
[7]
KayaniK F, ShateryO B A, MustafaM S, et al. Environmentally sustainable synthesis of whey-based carbon dots for ferric ion detection in human serum and water samples:evaluating the greenness of the method[J]. RSC Advances, 2024, 14(8):5012-5021.
[8]
WangY D, XianY L. Colorimetric sensing strategy through the coordination chemistry between ascorbic acid 2-phosphate and copper ions[J]. Analytical Chemistry, 2023, 95(18):7202-7211.
WangR, MoZ, PeiH, et al. Fluorometric/electrochemical dual-channel sensors based on carbon quantum dots for the detection and information anti-counterfeiting[J]. Journal of Photochemistry and Photobiology A:Chemistry, 2022, 432:114118.
[12]
BaiZ, LiP, FuH, et al. Fluorescence and electrochemical integrated dual-signal sensor for the detection of iron ions in water based on an ITO substrate[J]. Analyst, 2022, 147(20):4489-4499.
[13]
ZhouW, HuZ, WeiJ, et al. A ratiometric fluorescent probe based on PCN-224 for rapid and ultrasensitive detection of copper ions[J]. Composites Communications, 2022, 33:101221.
[14]
DuB, LiQ, HuangK, et al. A quinoline-fluoran hybrid fluorescent probe for selectively and sensitively sensing copper ions and fluorescence imaging application[J]. Journal of Molecular Structure, 2023, 1271:134015.
[15]
LinS, LiuS, DaiG, et al. A click-induced fluorescence-quenching sensor based on gold nanoparticles for detection of copper(Ⅱ) ion and ascorbic acid[J]. Dyes and Pigments, 2021, 195:109726.
[16]
LiuJ, ZhaoC, YangJ, et al. A novel hybrid lanthanide metal-organic frameworks based on porphyrin for rapid detection of iron ions[J]. Analytica Chimica Acta, 2024, 1319:342961.
[17]
GiordanoM G, SegantiG, BartoliM, et al. An overview on carbon quantum dots optical and chemical features[J]. Molecules, 2023, 28(6):2772.
LiuY, ChenJ, XuZ, et al. Detection of multiple metal ions in water with a fluorescence sensor based on carbon quantum dots assisted by stepwise prediction and machine learning[J]. Environmental Chemistry Letters, 2022, 20(6):3415-3420.
GeJ, ShenY, WangW, et al. N-doped carbon dots for highly sensitive and selective sensing of copper ion and sulfide anion in lake water[J]. Journal of Environmental Chemical Engineering, 2021, 9(2):105081.
[22]
WangC, ShiH, YangM, et al. Facile synthesis of novel carbon quantum dots from biomass waste for highly sensitive detection of iron ions[J]. Materials Research Bulletin, 2020, 124:110730.
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