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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 17:53 |
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Conference: Bucharest University Faculty of Physics 2023 Meeting
Section: Solid State Physics and Materials Science, Optics, Spectroscopy, Plasma and Lasers
Title:
Synthesis, Optical Properties and Electrodes Used for the Evaluation of Curcumin’s Concentration
Authors:
Teodora BURLANESCU(1,2), Mihaela BAIBARAC(1)
*
Affiliation:
1) National Institute of Materials Physics, Atomistilor street 405A, P.O. Box MG-7, 077125 Bucharest, Romania
2) Faculty of Physics, University of Bucharest, P.O. Box MG-11, 077125 Bucharest, Romania
E-mail
teodora.burlanescu@infim.ro
Keywords:
UV-VIS spectroscopy, Raman spectroscopy, detection of curcumin
Abstract:
This work presents the synthesis, optical properties, and principal electrodes employed for the evaluation of curcumin's concentration. Curcumin (CM) is a natural pigment, possessing a crystalline structure and is the most significant curcuminoid in turmeric. CM is effective in treating a wide array of diseases, particularly cancers, due to its antioxidant, antiproliferative, antibacterial, and anti-inflammatory properties [1,2]. In terms of its optical properties, curcumin has been characterized in previous studies by: a) an absorption band with a maximum located at 429 nm assigned to π-π* electronic transitions [3]; b) a photoluminescence band situated in the spectral range of 450-650 nm [4]; c) a Raman spectrum displaying peaks at 962, 1150, 1184, 1249, 1318, 1431, 1626 and 1601 cm-1, with the most prominent Raman bands located at 1601 and 1626 cm-1 attributed to the stretching vibrational mode of the C-C bond in the benzene ring and the C=O vibrational bond, respectively [5]; and d) an IR spectrum showing bands located at 1024, 1278, 1428, 1509, 1597, 1628 and 3508 cm-1 [6]. Electrochemical techniques are extensively utilized to provide valuable information about electrochemical systems. The electrodes used for quantifying curcumin concentration have been modified with carbon nanoparticles, nanocomposites, polymers, inorganic nanowires, and ionic liquid [1]. Understanding curcumin's behaviour in mediums with pH ranging from acidic to neutral and to basic is crucial for accurately quantifying curcumin concentration in biological samples. An example of curcumin's behaviour in a basic medium is demonstrated by UV-VIS spectroscopy. Preliminary data indicate a decrease in absorbance at 462-468 nm when curcumin interacts with NaOH and the sample is exposed to UV light.
References:
[1] Zokhtareh, Rosan. Analytical Methods, 11, 4401-4409, 2019.
[2] Li, Kunjing. Analytical Methods, 6. 7801-7808, 2014.
[3] Del Castillo, M. Vibrational Spectroscopy, 81, 106–111, 2015.
[4] Bhopate, D. New Journal of Chemistry, 39(9), 7086–7096, 2015.
[5] Castillo, M., Vibrational Spectroscopy, 81, 106–111, 2015.
[6] Chen, X. Molecules, 20(8), 14293–14311, 2015.
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