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| Format: | Artículo Open Access |
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Wiley
2025
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| Online Access: | https://onlinelibrary.wiley.com/doi/10.1111/php.14119 |
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| author | Gustavo Wander Streit Rafael Bernardino Rodrigues da Silva Taques Gabriela Fernandes Barreto Fabiano Vargas Pereira Gilson DeFreitas‐Silva Thiago Teixeira Tasso |
| author_facet | Gustavo Wander Streit Rafael Bernardino Rodrigues da Silva Taques Gabriela Fernandes Barreto Fabiano Vargas Pereira Gilson DeFreitas‐Silva Thiago Teixeira Tasso Gustavo Wander Streit Rafael Bernardino Rodrigues da Silva Taques Gabriela Fernandes Barreto Fabiano Vargas Pereira Gilson DeFreitas‐Silva Thiago Teixeira Tasso |
| collection | Wiley Open Access |
| contents | Enhanced fluorescence emission or singlet oxygen production of cationic porphyrazines and porphyrins through combination with carbon dots Gustavo Wander Streit Rafael Bernardino Rodrigues da Silva Taques Gabriela Fernandes Barreto Fabiano Vargas Pereira Gilson DeFreitas‐Silva Thiago Teixeira Tasso Photochemistry and Photobiology AbstractA cationic porphyrin and porphyrazine with the 3‐ethylpyridyl substituent (H2P and H2Pz) and their respective zinc complexes (ZnP and ZnPz) were assembled to a carbon dot (CD) synthesized from citric acid and ammonium citrate. A titration was performed using a fluorescence spectrophotometer to determine the stoichiometric ratio at which the maximum interaction between the substances occurs, as well as the Stern–Volmer constant and intrinsic binding constant. The combination between CD and porphyrins or porphyrazines was confirmed using UV–VIS absorption spectroscopy, fluorescence emission, zeta potential, and Diffusion‐Ordered NMR Spectroscopy (DOSY). It was observed that after combination, there is a decline in the absorption of porphyrin derivatives, a variation in the emission of porphyrazines, a subtle increase in the zeta potential compared to the isolated CD particles, and a variation in the translational diffusion coefficient. It was also found that upon combination with the CD, changes in the photophysical properties of the macrocycles occur, for example, the fluorescence quantum yield of H2Pz increases from 0.81 ± 0.03% to 1.97 ± 0.05% while the singlet oxygen quantum yield of H2P increases ca. 70%. These results exemplify the capacity of CD to boost some properties of photosensitizers that are key for photodynamic therapy applications. 10.1111/php.14119 http://creativecommons.org/licenses/by/4.0/ |
| doi_str_mv | 10.1111/php.14119 |
| format | Artículo Open Access |
| id | wiley_oa_10_1111_php_14119 |
| institution | Wiley Open Access |
| license_str_mv | http://creativecommons.org/licenses/by/4.0/ |
| publishDate | 2025 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Enhanced fluorescence emission or singlet oxygen production of cationic porphyrazines and porphyrins through combination with carbon dots Gustavo Wander Streit Rafael Bernardino Rodrigues da Silva Taques Gabriela Fernandes Barreto Fabiano Vargas Pereira Gilson DeFreitas‐Silva Thiago Teixeira Tasso Photochemistry and Photobiology Enhanced fluorescence emission or singlet oxygen production of cationic porphyrazines and porphyrins through combination with carbon dots Gustavo Wander Streit Rafael Bernardino Rodrigues da Silva Taques Gabriela Fernandes Barreto Fabiano Vargas Pereira Gilson DeFreitas‐Silva Thiago Teixeira Tasso Photochemistry and Photobiology AbstractA cationic porphyrin and porphyrazine with the 3‐ethylpyridyl substituent (H2P and H2Pz) and their respective zinc complexes (ZnP and ZnPz) were assembled to a carbon dot (CD) synthesized from citric acid and ammonium citrate. A titration was performed using a fluorescence spectrophotometer to determine the stoichiometric ratio at which the maximum interaction between the substances occurs, as well as the Stern–Volmer constant and intrinsic binding constant. The combination between CD and porphyrins or porphyrazines was confirmed using UV–VIS absorption spectroscopy, fluorescence emission, zeta potential, and Diffusion‐Ordered NMR Spectroscopy (DOSY). It was observed that after combination, there is a decline in the absorption of porphyrin derivatives, a variation in the emission of porphyrazines, a subtle increase in the zeta potential compared to the isolated CD particles, and a variation in the translational diffusion coefficient. It was also found that upon combination with the CD, changes in the photophysical properties of the macrocycles occur, for example, the fluorescence quantum yield of H2Pz increases from 0.81 ± 0.03% to 1.97 ± 0.05% while the singlet oxygen quantum yield of H2P increases ca. 70%. These results exemplify the capacity of CD to boost some properties of photosensitizers that are key for photodynamic therapy applications. 10.1111/php.14119 http://creativecommons.org/licenses/by/4.0/ |
| title | Enhanced fluorescence emission or singlet oxygen production of cationic porphyrazines and porphyrins through combination with carbon dots |
| topic | Photochemistry and Photobiology |
| url | https://onlinelibrary.wiley.com/doi/10.1111/php.14119 |