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Daescu M, Matea A, Negrila C, Serbschi C, Ion AC, Baibarac M. Photoluminescence as a Valuable Tool in the Optical Characterization of Acetaminophen and the Monitoring of Its Photodegradation Reactions. Molecules 2020; 25:E4571. [PMID: 33036335 PMCID: PMC7582238 DOI: 10.3390/molecules25194571] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/01/2020] [Accepted: 10/06/2020] [Indexed: 02/05/2023] Open
Abstract
In this work, new evidence for the photodegradation reactions of acetaminophen (AC) is reported by photoluminescence (PL), Raman scattering and FTIR spectroscopy. Under excitation wavelength of 320 nm, AC shows a PL band in the spectral range of 340-550 nm, whose intensity decreases by exposure to UV light. The chemical interaction of AC with the NaOH solutions, having the concentration ranging between 0.001 and 0.3 M, induces a gradual enhancement of the photoluminescence excitation (PLE) and PL spectra, when the exposure time of samples at the UV light increases until 140 min, as a result of the formation of p-aminophenol and sodium acetate. This behavior is not influenced by the excipients or other active compounds in pharmaceutical products as demonstrated by PLE and PL studies. Experimental arguments for the obtaining of p-aminophenol and sodium acetate, when AC has interacted with NaOH, are shown by Raman scattering and FTIR spectroscopy.
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Affiliation(s)
- Monica Daescu
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 077125 Bucharest, Romania; (M.D.); (A.M.)
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Gh. Polizu St 1-7, 011061 Bucharest, Romania;
| | - Adelina Matea
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 077125 Bucharest, Romania; (M.D.); (A.M.)
| | - Catalin Negrila
- Nanoscale Condensed Matter Laboratory, National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 077125 Bucharest, Romania;
| | | | - Alina C. Ion
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Gh. Polizu St 1-7, 011061 Bucharest, Romania;
| | - Mihaela Baibarac
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 077125 Bucharest, Romania; (M.D.); (A.M.)
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Covaci OI, Samohvalov D, Manta CM, Buhalteanu L, Barbatu A, Baibarac M, Daescu M, Matea A, Gherca D. Novel anhydrous solid-state form of Azathioprine: The assessing of crystal structure by powder X-Ray diffraction, Infrared Absorption Spectroscopy and Raman scattering. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.10.065] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Baibarac M, Matea A, Daescu M, Mercioniu I, Quillard S, Mevellec JY, Lefrant S. Polyaniline photoluminescence quenching induced by single-walled carbon nanotubes enriched in metallic and semiconducting tubes. Sci Rep 2018; 8:9518. [PMID: 29934614 PMCID: PMC6015054 DOI: 10.1038/s41598-018-27769-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 06/06/2018] [Indexed: 11/09/2022] Open
Abstract
The influence of single-walled carbon nanotubes enriched in semiconductor (S-SWNTs) and metallic (M-SWNTs) tubes on the photoluminescence (PL) of polyaniline (PANI), electrosynthesized in the presence of the H2SO4 and HCl solutions, is reported. The emission bands peaked at 407-418 and 440-520 nm indicate that the electropolymerization of aniline (ANI) leads to the formation of short and longer macromolecular chains (MCs), respectively. We demonstrate that the reaction product consists of ANI tetramers (TT) and trimers (TR) as well as PANI-salt. Using Raman scattering and IR absorption spectroscopy, a covalent functionalization of SWNTs with shorter and longer MCs of PANI-salt is demonstrated. The presence of S-SWNTs and M-SWNTs induces a decrease in ANI TT weight in the reaction product mass consisting in S-SWNTs and M-SWNTs covalently functionalized with PANI-emeraldine salt (ES) and PANI-leucoemeraldine salt (LS), respectively. A PANI PL quenching is reported to be induced of the S-SWNTs and M-SWNTs. A de-excitation mechanism is proposed to explain PANI PL quenching.
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Affiliation(s)
- Mihaela Baibarac
- National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, P.O. Box MG-7, R077125, Bucharest, Romania.
| | - Adelina Matea
- National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, P.O. Box MG-7, R077125, Bucharest, Romania.,Faculty of Physics, University of Bucharest, 405A Atomistilor, P.O. Box MG-1, 077125, Bucharest, Romania
| | - Monica Daescu
- National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, P.O. Box MG-7, R077125, Bucharest, Romania
| | - Ionel Mercioniu
- National Institute of Materials Physics, Laboratory of Optical Processes in Nanostructured Materials, P.O. Box MG-7, R077125, Bucharest, Romania
| | - Sophie Quillard
- Institut des Mateŕiaux "Jean Rouxel", 2 rue de la Houssinieŕe, B.P. 32229, F-44322, Nantes, cedex 3, France
| | - Jean-Yves Mevellec
- Institut des Mateŕiaux "Jean Rouxel", 2 rue de la Houssinieŕe, B.P. 32229, F-44322, Nantes, cedex 3, France
| | - Serge Lefrant
- Institut des Mateŕiaux "Jean Rouxel", 2 rue de la Houssinieŕe, B.P. 32229, F-44322, Nantes, cedex 3, France
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Matea A, Baibarac M, Baltog I. Optical properties of single-walled carbon nanotubes highly separated in semiconducting and metallic tubes functionalized with poly(vinylidene fluoride). J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.10.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Smaranda I, Baibarac M, Ilie M, Matea A, Baltog I, Lefrant S. Optical Properties of Single-Walled Carbon Nanotubes Functionalized with Poly(2,2’-bithiophene-co-pyrene) Copolymer. CURR ORG CHEM 2015. [DOI: 10.2174/1385272819666150311231454] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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