|
1
|
Cercel R, Paraschiv M, Florica CS, Daescu M, Udrescu A, Ciobanu RC, Schreiner C, Baibarac M. New Aspects Concerning the Ampicillin Photodegradation. Pharmaceuticals (Basel) 2022; 15:ph15040415. [PMID: 35455412 PMCID: PMC9027919 DOI: 10.3390/ph15040415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Revised: 03/20/2022] [Accepted: 03/25/2022] [Indexed: 12/01/2022] Open
Abstract
New aspects concerning the photodegradation (PD) of ampicillin are reported by photoluminescence (PL), Raman scattering and FTIR spectroscopy. The exposure of ampicillin in the absence (AM) and in the presence of the excipient (AMP) to UV light leads to an intensity diminution of the photoluminescence excitation (PLE) and photoluminescence (PL) spectra and the emergence of a new IR band at 3450 cm−1. The photoluminescence studies demonstrate that the AM PD is amplified in the presence of excipients and an alkaline medium. In this last case, the PD process of AM involves the emergence of new compounds, whose presence is highlighted by: (i) the emergence of the isosbestic point at 300 nm in the UV-VIS spectra; (ii) a change in the ratio between the absorbance of IR bands situated in the spectral ranges 1200–1660 and 3250–3450 cm−1; and (iii) a change in the ratio between the intensities of the Raman lines localized in the spectral ranges 1050–1800 and 2750–3100 cm−1. A chemical mechanism of the PD processes of AM in an alkaline medium is proposed.
Collapse
Affiliation(s)
- Radu Cercel
- National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 077125 Bucharest, Romania; (R.C.); (M.P.); (C.S.F.); (M.D.); (A.U.)
| | - Mirela Paraschiv
- National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 077125 Bucharest, Romania; (R.C.); (M.P.); (C.S.F.); (M.D.); (A.U.)
| | - Cristina Stefania Florica
- National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 077125 Bucharest, Romania; (R.C.); (M.P.); (C.S.F.); (M.D.); (A.U.)
| | - Monica Daescu
- National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 077125 Bucharest, Romania; (R.C.); (M.P.); (C.S.F.); (M.D.); (A.U.)
| | - Adelina Udrescu
- National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 077125 Bucharest, Romania; (R.C.); (M.P.); (C.S.F.); (M.D.); (A.U.)
| | - Romeo C. Ciobanu
- SC All Green SRL, 8 George Cosbuc Str., 700470 Iasi, Romania; (R.C.C.); (C.S.)
| | - Cristina Schreiner
- SC All Green SRL, 8 George Cosbuc Str., 700470 Iasi, Romania; (R.C.C.); (C.S.)
- Faculty of Electrical Engineering, Department of Electrical Measurements and Materials, Technical University Gh. Asachi Iasi, Bd. Profesor Dimitrie Mangeron 67, 700050 Iasi, Romania
| | - Mihaela Baibarac
- National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 077125 Bucharest, Romania; (R.C.); (M.P.); (C.S.F.); (M.D.); (A.U.)
- Correspondence: ; Tel.: +40-21-3690170
| |
Collapse
|
|
2
|
Oprica M, Iota M, Daescu M, Fejer SN, Negrila C, Baibarac M. Spectroscopic studies on photodegradation of atorvastatin calcium. Sci Rep 2021; 11:15338. [PMID: 34321518 PMCID: PMC8319406 DOI: 10.1038/s41598-021-94693-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 07/14/2021] [Indexed: 11/09/2022] Open
Abstract
In this work, the photodegradation process of atorvastatin calcium (ATC) is reported as depending on: (1) the presence and the absence of excipients in the solid state; (2) the chemical interaction of ATC with phosphate buffer (PB) having pH equal to 7 and 8; and (3) hydrolysis reaction of ATC in the presence of aqueous solution of NaOH. The novelty of this work consists in the monitoring of the ATC photodegradation by photoluminescence (PL). The exposure of ATC in solid state to UV light induces the photo-oxygenation reactions in the presence of water vapors and oxygen from air. According to the X-ray photoelectron spectroscopic studies, we demonstrate that the photo-oxygenation reaction leads to photodegradation compounds having a high share of C=O bonds compared to ATC before exposure to UV light. Both in the presence of PB and NaOH, the photodegradation process of ATC is highlighted by a significant decrease in the intensity of the PL and photoluminescence excitation (PLE) spectra. According to PLE spectra, the exposure of ATC in the presence of NaOH to UV light leads to the appearance of a new band in the spectral range 340-370 nm, this belonging to the photodegradation products. Arguments concerning the chemical compounds, that resulted in this last case, are shown by Raman scattering and FTIR spectroscopy.
Collapse
Affiliation(s)
- Madalina Oprica
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 77125, Magurele, Romania
| | - Miruna Iota
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 77125, Magurele, Romania
| | - Monica Daescu
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 77125, Magurele, Romania
| | - Szilard N Fejer
- Pro-Vitam Ltd., Muncitorilor Street 16, Sfantu Gheorghe, Romania
| | - Catalin Negrila
- Nanoscale Condensed Matter Laboratory, National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 77125, Magurele, Romania
| | - Mihaela Baibarac
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, P.O. Box MG-7, 77125, Magurele, Romania.
| |
Collapse
|
|
3
|
Daescu M, Iota M, Serbschi C, Ion AC, Baibarac M. The Influence of UV Light on Photodegradation of Acetylsalicylic Acid. Int J Mol Sci 2021; 22:4046. [PMID: 33919943 PMCID: PMC8070936 DOI: 10.3390/ijms22084046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/10/2021] [Accepted: 04/12/2021] [Indexed: 01/07/2023] Open
Abstract
Photodegradation of the aqueous solutions of acetylsalicylic acid, in the absence (ASA) and the presence of excipients (ASE), is demonstrated by the photoluminescence (PL). A shift of the PL bands from 342 and 338 nm to 358 and 361-397 nm for ASA and ASE in solid state and as aqueous solutions was reported. By exposure of the solution of ASA 0.3 M to UV light, a decrease in the PL band intensity was highlighted. This behavior was revealed for ASA in the presence of phosphate buffer (PB) having the pH equal to 6.4, 7, and 8 or by the interaction with NaOH 0.3 M. A different behavior was reported in the case of ASE. In the presence of PB, an increase in the intensity of the PL band of ASE simultaneously with a change of the ratio between the intensities of the bands at 361-364 and 394-397 nm was highlighted. The differences between PL spectra of ASA and ASE have their origin in the presence of salicylic acid (SAL). The interaction of ASE with NaOH induces a shift of the PL band at 405-407 nm. Arguments for the reaction of ASA with NaOH are shown by Raman scattering and FTIR spectroscopy.
Collapse
Affiliation(s)
- Monica Daescu
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, POB MG 7, 077125 Bucharest, Romania; (M.D.); (M.I.)
- Faculty of Applied Chemistry & Material Science, University Politehnica of Bucharest, Gh. Polizu Street 1-7, 011061 Bucharest, Romania;
| | - Miruna Iota
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, POB MG 7, 077125 Bucharest, Romania; (M.D.); (M.I.)
| | | | - Alina C. Ion
- Faculty of Applied Chemistry & Material Science, University Politehnica of Bucharest, Gh. Polizu Street 1-7, 011061 Bucharest, Romania;
| | - Mihaela Baibarac
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, POB MG 7, 077125 Bucharest, Romania; (M.D.); (M.I.)
| |
Collapse
|
|
4
|
Song WJ, Su H, Zhou P, Zhu YH, Khan MA, Song JB, Li H. Controllable synthesis of two adenosine 5'-monophosphate nucleotide coordination polymers via pH regulation: crystal structure and chirality. Dalton Trans 2021; 50:4713-4719. [PMID: 33729226 DOI: 10.1039/d1dt00133g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two types of Cu(ii)-AMP-4,4'-bipy coordination polymers, {[Cu(AMP)(4,4'-bipy)(H2O)3]·5H2O}n (1) and {[Cu2(HAMP)2(4,4'-bipy)2(H2O)4]·2NO3·11H2O}n (2) (Na2AMP = adenosine 5'-monophosphate disodium salt), were synthesised through pH control. X-ray single-crystal diffraction analysis revealed that 1 and 2 are one-dimensional (1D) coordinating coordination polymers. The nucleotide in 1 was not protonated whereas that in 2 was protonated. With the protonated NO3- in 2 entering the crystal lattice, it plays a role in balancing the charge. The chirality was studied using solid-state circular dichroism (CD) spectroscopy based on the analysis of crystal structures.
Collapse
Affiliation(s)
- Wen-Jing Song
- Key Laboratory of Clusters Science of Ministry of Education, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P.R. China.
| | | | | | | | | | | | | |
Collapse
|