{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,12]],"date-time":"2026-09-12T00:06:32Z","timestamp":1789171592924,"version":"build-2803163510"},"reference-count":45,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2021,4,14]],"date-time":"2021-04-14T00:00:00Z","timestamp":1618358400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"European Regional Development Fund under the Competitiveness Operational Program 2014-2020","award":["POC 58\/05.09.2016, subcontract D type, no. 2626\/04.12.2017"],"award-info":[{"award-number":["POC 58\/05.09.2016, subcontract D type, no. 2626\/04.12.2017"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>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\u2013397 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\u2013364 and 394\u2013397 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\u2013407 nm. Arguments for the reaction of ASA with NaOH are shown by Raman scattering and FTIR spectroscopy.<\/jats:p>","DOI":"10.3390\/ijms22084046","type":"journal-article","created":{"date-parts":[[2021,4,14]],"date-time":"2021-04-14T15:30:39Z","timestamp":1618414239000},"page":"4046","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["The Influence of UV Light on Photodegradation of Acetylsalicylic Acid"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3178-5237","authenticated-orcid":false,"given":"Monica","family":"Daescu","sequence":"first","affiliation":[{"name":"Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, POB MG 7, 077125 Bucharest, Romania"},{"name":"Faculty of Applied Chemistry &amp; Material Science, University Politehnica of Bucharest, Gh. Polizu Street 1-7, 011061 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Miruna","family":"Iota","sequence":"additional","affiliation":[{"name":"Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, POB MG 7, 077125 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Constantin","family":"Serbschi","sequence":"additional","affiliation":[{"name":"Bioelectronic SRL, Cercelus St 54, 100028 Ploiesti, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alina C.","family":"Ion","sequence":"additional","affiliation":[{"name":"Faculty of Applied Chemistry &amp; Material Science, University Politehnica of Bucharest, Gh. Polizu Street 1-7, 011061 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mihaela","family":"Baibarac","sequence":"additional","affiliation":[{"name":"Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, Atomistilor Street 405A, POB MG 7, 077125 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"140043","DOI":"10.1016\/j.scitotenv.2020.140043","article-title":"Toxicity of the Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) acetylsalicylic acid, paracetamol, diclofenac, ibuprofen and naproxen towards freshwater invertebrates: A review","volume":"740","author":"Parolini","year":"2020","journal-title":"Sci. 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