Hafed-Khatiri, Salma, Quintero-Jaime, Andrés Felipe, Salinas-Torres, David, Montilla, Francisco
Electrofluorochromism of Conjugated Polymers Applied to the Development of Chemical Sensors
ACS Applied Electronic Materials. 2024, 6(2): 847-852. https://doi.org/10.1021/acsaelm.3c01384
URI: http://hdl.handle.net/10045/139995
DOI: 10.1021/acsaelm.3c01384
ISSN: 2637-6113
Abstract: 
Electrofluorochromism (EFC) is a phenomenon widely employed for the development of optoelectronic devices. In this work, we applied EFC as a powerful tool in sensing applications. The ability to tune the photoluminescence emission by controlling the applied potential may help maximize the response to target molecules. We have explored the EFC of the conjugated copolymer poly[9,9-dioctylfluorene-alt-benzothiadiazole] (F8BT) to design an electrofluorochromic sensor able to detect emerging pollutants with a significant impact in the marine ecosystems. In particular, a sulfonic acid-based chemical sunscreen (Ecamsule) was used as a model molecule. The photoluminescence emission modulation is affected by the presence of Ecamsule, which is attributed to the enhanced quenching process of F8BT during the p-doping process. The quenching is due to the formation of exciplex-like within the conjugated film upon the insertion of the organic anionic molecule in the polymer chain. The developed F8BT-based electrofluorochromic sensor displays a low limit of detection and good selectivity in the presence of interfering anions that are common in seawater.
Keywords:Electrofluorochromic sensor, In situ fluorescence spectroscopy, F8BT, Sulfonic acid-based sunscreen, Ecamsule, Mexoryl SX
American Chemical Society
info:eu-repo/semantics/article