Núñez Martínez, ManuelFernández Míguez, ManuelQuiñoá Cabana, EmilioFreire Iribarne, Félix Manuel2025-06-042025-06-042025Núñez-Martínez, M., Fernández-Míguez, M., Quiñoá, E., Freire, F. (2025). Colorimetric detector of oxidizing metal ions by anilide-poly(phenylacetylene)s. "Nanoscale", vol. 17, pax. 4439-44432040-3364https://hdl.handle.net/10347/41979Poly(phenylacetylene)s (PPAs) bearing para-substituted anilide pendant groups are sensitive to the presence of oxidizing metal ions such as Cu2+, Hg2+, Fe3+, Au3+ or Ce4+ due to a redox reaction between the anilide-PPA and the metal ion. Using a library of six different PPAs containing diverse chiral pendant groups connected to the PPA backbone through the N (anilide) or C (benzamide) atoms of an amide group used as a linker, it was found that anilide-PPAs are sensitive to oxidizing metal ions. In these polymers, and through a redox reaction, a radical species is delocalized along the polyene backbone, resulting in a color change of the solution from yellow to blue. UV-Vis, ECD, IR, EPR, XPS and computational studies were carried out to demonstrate the electron transfer from PPA to the oxidizing metal once the metal coordinates with the anilide of the polymer.engAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/2306 Química orgánicajournal article10.1039/D4NR03662J2040-3372open access