{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T11:03:24Z","timestamp":1789556604102,"version":"build-2803163510"},"reference-count":32,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T00:00:00Z","timestamp":1789516800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministry of Research, Innovation and Digitization, CNCS\u2014UEFISCDI","award":["PN-IV-P2-2.1-TE-2023-0592"],"award-info":[{"award-number":["PN-IV-P2-2.1-TE-2023-0592"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Biopolymers functionalized with chromophores exhibit interesting optical properties with a high potential for applications in photonics. Quinoline yellow (QY), sunset yellow (SY) and riboflavin (RB) are commonly used as colorants in the food industry, which makes them suitable candidates for the development and manufacture of environmentally friendly devices for integrated photonics. The incorporation of these dyes into a deoxyribonucleic acid (DNA) matrix could significantly contribute to enhance the optical response and sensitivity of the obtained composites. This enhancement is mainly due to the interaction between the conjugated \u03c0-electrons from the aromatic groups of the chromophores and the DNA matrix. Also, it may influence the appearance of interesting molecular structural arrangements and modify the local electronic environment. The linear optical analysis was performed by UV-Vis, fluorescence and Fourier transform infrared (FTIR) spectroscopies. At the same time, the pump\u2013probe interferometric method was used to study the light-induced refractive index modification.<\/jats:p>","DOI":"10.3390\/polym18182256","type":"journal-article","created":{"date-parts":[[2026,9,16]],"date-time":"2026-09-16T10:09:17Z","timestamp":1789553357000},"page":"2256","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Comparative Optical Response of DNA-Natural and Synthetic Food Colorant Systems"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1570-564X","authenticated-orcid":false,"given":"Ana-Maria","family":"Manea-Saghin","sequence":"first","affiliation":[{"name":"Research Center for Environmental Protection and Eco-Friendly Technologies, National University of Science and Technology POLITEHNICA of Bucharest, 1\u20137 Polizu Street, 011061 Bucharest, Romania"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"},{"role":"validation","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"investigation","vocabulary":"credit"},{"role":"resources","vocabulary":"credit"},{"role":"data-curation","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"},{"role":"visualization","vocabulary":"credit"},{"role":"supervision","vocabulary":"credit"},{"role":"project-administration","vocabulary":"credit"},{"role":"funding-acquisition","vocabulary":"credit"}]},{"given":"Petronela","family":"Gheorghe","sequence":"additional","affiliation":[{"name":"National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1244-9863","authenticated-orcid":false,"given":"Jaroslaw","family":"Mysliwiec","sequence":"additional","affiliation":[{"name":"Soft Mater Optics Group, Wroclaw University of Science and Technology, 27, 50-370 Wroclaw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,9,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"569","DOI":"10.1016\/j.mssp.2015.05.040","article-title":"Electrical and photoelectrical characterization of an organic\u2013inorganic heterojunction based on quinoline yellow dye","volume":"39","author":"Ugur","year":"2015","journal-title":"Mater. 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