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Article

Large Enhancement of the Luminescence Properties of an Eu(III) Dye upon Association with the DNA-CTMA Matrix

by
Daniele Marinotto
1,*,
Cosmina Andreea Marin
2,3,4,
Ileana Rau
2,
Alessia Colombo
5,
Francesco Fagnani
5,*,
Dominique Roberto
5 and
Claudia Dragonetti
5
1
Istituto di Scienze e Tecnologie Chimiche (SCITEC) “Giulio Natta”, Consiglio Nazionale delle Ricerche (CNR), Via C. Golgi 19, 20133 Milan, Italy
2
Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology POLITEHNICA Bucharest, 1-7 Polizu Street, 011061 Bucharest, Romania
3
Secondary School “Nicolae Bălcescu”, Aleea Școlii 2, 100498 Ploieşti, Romania
4
Secondary School “Nicolae Titulescu”, Popa Farcaș 23, 100058 Ploieşti, Romania
5
Dipartimento di Chimica, Università degli Studi di Milano, UdR-INSTM, Via C. Golgi 19, 20133 Milan, Italy
*
Authors to whom correspondence should be addressed.
Molecules 2025, 30(6), 1395; https://doi.org/10.3390/molecules30061395
Submission received: 14 February 2025 / Revised: 18 March 2025 / Accepted: 18 March 2025 / Published: 20 March 2025
(This article belongs to the Special Issue 30th Anniversary of Molecules: Recent Advances in Photochemistry)
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Abstract

In this study, the photophysical properties of thin films of an Eu3+ dye, namely europium tetrakis(dibenzoylmethide) triethylammonium (EuD4TEA), within deoxyribonucleic acid (DNA) biopolymer functionalized with hexadecyltrimethylammonium chloride (CTMA) were extensively investigated and compared with those of thin films of the same dye embedded in more conventional polymers, like poly(methyl methacrylate) and polycarbonate. The new materials obtained have good optical properties, as shown by their absorption and emission spectra. Remarkably, a large enhancement in photoluminescence was observed upon the interaction of EuD4TEA with DNA-CTMA (2- and 17-fold increase in luminescence quantum yield with respect to PMMA and PC). Photophysical analyses suggest that the emission enhancement was mainly due to the increase in the sensitization efficiency (ηsens) from the ligands to the Eu3+ ion along with the suppression of the vibrational deactivation upon immobilization onto the DNA-CTMA matrix, as the concentration of the complex increased from 20 to 50%. These phenomena are primarily driven by the transformation of the Eu3+ micro-environments, which are created by the interactions between complex ligands and the DNA-CTMA matrix.
Keywords: deoxyribonucleic acid (DNA); biopolymer; europium dye; sustainable materials; biodegradable matrices deoxyribonucleic acid (DNA); biopolymer; europium dye; sustainable materials; biodegradable matrices
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MDPI and ACS Style

Marinotto, D.; Marin, C.A.; Rau, I.; Colombo, A.; Fagnani, F.; Roberto, D.; Dragonetti, C. Large Enhancement of the Luminescence Properties of an Eu(III) Dye upon Association with the DNA-CTMA Matrix. Molecules 2025, 30, 1395. https://doi.org/10.3390/molecules30061395

AMA Style

Marinotto D, Marin CA, Rau I, Colombo A, Fagnani F, Roberto D, Dragonetti C. Large Enhancement of the Luminescence Properties of an Eu(III) Dye upon Association with the DNA-CTMA Matrix. Molecules. 2025; 30(6):1395. https://doi.org/10.3390/molecules30061395

Chicago/Turabian Style

Marinotto, Daniele, Cosmina Andreea Marin, Ileana Rau, Alessia Colombo, Francesco Fagnani, Dominique Roberto, and Claudia Dragonetti. 2025. "Large Enhancement of the Luminescence Properties of an Eu(III) Dye upon Association with the DNA-CTMA Matrix" Molecules 30, no. 6: 1395. https://doi.org/10.3390/molecules30061395

APA Style

Marinotto, D., Marin, C. A., Rau, I., Colombo, A., Fagnani, F., Roberto, D., & Dragonetti, C. (2025). Large Enhancement of the Luminescence Properties of an Eu(III) Dye upon Association with the DNA-CTMA Matrix. Molecules, 30(6), 1395. https://doi.org/10.3390/molecules30061395

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