HYDROTHERMAL SYNTHESIS OF CARBON DOTS BASED ON GLYCYRRHIZIC ACID AND THIOUREA
Keywords:
Carbon dots (CDs), Glycyrrhizic acid (GLA), Thiourea (TM), Hydrothermal synthesis, Dynamic Light Scattering (DLS), Fourier-transform infrared spectroscopy (FT-IR).Abstract
This study describes a hydrothermal method for synthesizing novel carbon dots (CDs) based on glycyrrhizic acid (GLA) and thiourea (TM). Detailed information is provided regarding the optimal ratios and concentrations of the precursors, as well as the specific synthesis duration and temperature parameters. Furthermore, the purification processes and stages employed to isolate the synthesized CDs in their pure form are elucidated.
The synthesized CDs are classified as nanoscale materials, and their particle size distribution was analyzed using Dynamic Light Scattering (DLS). The results indicated a particle size range of 6.9–12.52 nm, confirming the high degree of structural uniformity. The chemical structure of the synthesized CDs was characterized via Fourier-transform infrared (FT-IR) spectroscopy and compared with the spectra of the initial precursors, GLA and TM. The analysis reveals significant chemical transformations of the functional groups present in the starting materials as a result of the reaction, which are clearly reflected in the shifting and emergence of characteristic peaks in the FT-IR spectra.
References
1. Tuerhong M., Yang X. U., Xue-Bo Y. I. N. Review on carbon dots and their applications // Chinese Journal of Analytical Chemistry. – 2017. – Т. 45. – №. 1. – С. 139-150.
2. Wang H. et al. Biocompatible PEG‐chitosan@ carbon dots hybrid nanogels // Advanced Functional Materials. – 2015. – Т. 25. – №. 34. – С. 5537-5547.
3. Kong B., Zhu A., Ding C., Zhao M., Li B., Tian Y. Carbon dot-based ratiometric fluorescent sensor for sensitive and selective detection of mercury (II) ions // Biosensors and Bioelectronics. – 2011. – Т. 30. – №. 1. – С. 14-19.
4. Baker S. N., Baker G. A. Luminescent carbon nanodots: emergent nanolights //Angewandte Chemie International Edition. – 2010. – Т. 49. – №. 38. – С. 6726-6744.
5. Wang Q. et al. Carbon dots: synthesis, properties and applications // Journal of Materials Chemistry C. – 2014. – Т. 2. – №. 34. – С. 6921-6939.
6. Berdimurodov E. et al. The recent development of carbon dots as powerful green corrosion inhibitors: A prospective review //Journal of Molecular Liquids. – 2022. – Т. 349. – С. 118124.
7. Hola K. et al. Carbon dots–Emerging light emitters for bioimaging, cancer therapy and optoelectronics // Nano Today. – 2014. – Т. 9. – №. 5. – С. 590-603
8. Li H., Kang Z., Liu Y., Lee S.T. Carbon nanodots: synthesis, properties and applications. Journal of Materials Chemistry, 2012, 22(46): 24230–24253.
9. Wang Y., Hu A. Carbon quantum dots: synthesis, properties and applications // Journal of Materials Chemistry C. – 2014. – Т. 2. – №. 34. – С. 6921-6939.
10. Saraswat V., Yadav M. Carbon dots as green corrosion inhibitor for mild steel in HCl solution // ChemistrySelect. – 2020. – Т. 5. – №. 25. – С. 7347-7357.
11. Lim S. Y., Shen W., Gao Z. Carbon quantum dots and their applications //Chemical Society Reviews. – 2015. – Т. 44. – №. 1. – С. 362-381.
12. Wang Y., Kalytchuk S., Zhang Y. et al. Brightening the performance of carbon dot by selective chemical functionalization. Chem. Commun., 2015, 51(15): 2964–2967.
13. Wang Y., Hu A. Carbon quantum dots: synthesis, properties and applications //Journal of Materials Chemistry C. – 2014. – Т. 2. – №. 34. – С. 6921-6939.
14. Babick F. Dynamic light scattering (DLS) //Characterization of nanoparticles. – Elsevier, 2020. – С. 137-172.
15. Huo X. et al. Solvent effects on fluorescence properties of carbon dots: implications for multicolor imaging //ACS omega. – 2021. – Т. 6. – №. 40. – С. 26499-26508.
16. Punjabi D. et al. Infrared spectrum analysis of organic molecules with neural networks using standard reference data sets in combination with real-world data //Journal of Cheminformatics. – 2025. – Т. 17. – №. 1. – С. 1-13.
17. Zhu S., Meng Q., Wang L. et al. Highly photoluminescent carbon dots for multicolor patterning, sensors, and bioimaging. Angew. Chem. Int. Ed., 2013, 52(14): 3953–3957.
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