RT Journal Article
T1 Colorimetric detection of oxidizing metal ions using anilide-poly(phenylacetylene)s
A1 Núñez Martínez, Manuel
A1 Fernández Míguez, Manuel
A1 Quiñoá Cabana, Emilio
A1 Freire Iribarne, Félix Manuel
AB Poly(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.
PB Royal Society of Chemistry
SN 2040-3364
YR 2025
FD 2025
LK https://hdl.handle.net/10347/41979
UL https://hdl.handle.net/10347/41979
LA eng
NO Núñez-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. 4439-4443
NO Financial support from AEI (PID2022-136848NB-I00), Xunta de Galicia (ED431C 2022/21, Centro Singular de Investigación de Galicia acreditación 2023–2027, ED431G 2023/03), and the European Regional Development Fund (ERDF) are gratefully acknowledged. M. N.-M. and M. F.-M. thank MICINN for an FPI contract (BES-2016-078107 and PID2019-109733GB-I00). We also thank Centro de Supercomputación de Galicia (CESGA) for computational resources
DS Minerva
RD 23 abr 2026