Syzygium cumini derived carbon dot: Design, synthesis and fluorescent sensing abilities towards selective identification of Fe³⁺ and Cu²⁺ ions

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Structure Pub Date : 2025-06-19 DOI:10.1016/j.molstruc.2025.143050

Sandeep Goyal, Savita Chaudhary

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Abstract

Syzygium cumini seeds derived Carbon dots (Sc@CQDs) have been synthesized by using calcination method. The Sc@CQDs exhibits remarkable optical properties, including high quantum yield (52.8 %) and highly fluorescent in nature. The structural analysis of developed Sc@CQDs has been done by various advance technique such as HRTEM, XPS, XRD, NMR, FTIR and UV visible spectroscopy. The HRTEM data confirmed the spherical morphology of Sc@CQDs with average size 3.6 nm. The Sc@CQDs demonstrate sensitive detection of Fe³⁺/Cu²⁺ ions with limit of detection (LOD) of 0.18 µM and 0.11 µM. The life time decay analysis confirmed the static quenching mechanism having the fluorescence lifetime for Sc@CQDs, Sc@CQDs + Fe³⁺ and Sc@CQDs + Cu²⁺were 2.57 ns, 2.68 ns and 2.69 ns respectively This study highlights the eco-friendly synthesis and practical application of Sc@CQDs in environmental monitoring and industrial processes requiring Fe³⁺/Cu²⁺ ions detection. Further, the developed sensor possessed higher potential for the detection of Fe³⁺/Cu²⁺ ions in real water samples with superior recovery rate.

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紫杉树衍生碳点：Fe +和Cu +选择性鉴定的设计、合成和荧光传感能力

采用煅烧法合成了芫荽籽衍生碳点（Sc@CQDs）。Sc@CQDs具有优异的光学性能，包括高量子产率（52.8%）和高荧光性质。利用HRTEM、XPS、XRD、NMR、FTIR、UV可见光谱等先进技术对Sc@CQDs进行了结构分析。HRTEM数据证实了Sc@CQDs的球形形貌，平均尺寸为3.6 nm。Sc@CQDs对Fe + /Cu2+离子的检测灵敏度较高，检测限（LOD）分别为0.18µM和0.11µM。寿命衰减分析证实了静态猝灭机制，Sc@CQDs、Sc@CQDs + Fe3+和Sc@CQDs + Cu2+的荧光寿命分别为2.57 ns、2.68 ns和2.69 ns。该研究突出了Sc@CQDs在环境监测和需要检测Fe³+ /Cu2+离子的工业过程中的环保合成和实际应用。此外，所开发的传感器具有更高的检测实际水样中Fe + /Cu2+离子的潜力，且回收率高。

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.